Flowserve® Worcester Controls

Worcester® Control Valves
Actuation & Controls

Q: What is Worcester Controls and who makes it?

Worcester Controls is Flowserve's quarter-turn ball valve and valve automation brand. The catalog covers three-piece, flanged, wafer and directional ball valves, special service variants including firesafe, cryogenic, chlorine, fugitive emission and high purity, plus electric and pneumatic actuators, switch boxes and positioners. Flowserve rotary valves are positioned around easy maintenance and automation backed by quality heritage brands.

Three-piece, flanged, wafer and directional ball valves with firesafe, cryogenic, chlorine, fugitive emission and high purity variants, plus electric and pneumatic actuators, switch boxes and positioners. A complete automated valve package from a single source. Specified and supported from Houston, Texas.

ASME B16.34API 6D & API 607NACE MR01-75 ASME BPEISO 5211NAMUR VDI/VDE 3845 ATEX & IECExFM, UL, CSA

Worcester® Controls is Flowserve®'s quarter-turn ball valve and valve automation brand. Flowserve rotary valves offer easy maintenance and automation backed by market-friendly expertise and quality heritage brands, and the Worcester catalog is unusual in covering the entire automated valve package under one product line: the valve, the actuator, the switch box, and the positioner.

That single-source scope is the practical argument for Worcester. On most projects the valve comes from one supplier, the actuator from another, and the mounting kit from a third, and the interfaces between them are where cost, lead time and alignment problems accumulate. Worcester valves arrive with pre-drilled actuation mounting or ISO 5211 as standard, the actuators carry NAMUR and ISO interfaces, and the switch boxes comply with NAMUR VDI/VDE 3845 so the coupler is eliminated entirely.

The range spans general process isolation through to genuinely difficult service: chlorine to Chlorine Institute Pamphlet 6, cryogenic to -425 degrees F, fugitive emission control for ASME B31.3 Category M fluids, high purity to ASME BPE and FDA 21CFR, and high pressure to 5,000 psi and ASME Class 2500.

E4 Industrial is an engineering-led flow systems company delivering pump systems and valve automation solutions for industrial, energy, and infrastructure markets. Call 281.664.8000 or email sales@e4industrial.com with your line size, class, media, temperature and required end connection, and we will return a sized selection with pricing and lead time.

Worcester® Controls is a Flowserve® brand.
E4 Industrial specifies and supplies complete Worcester valve and actuation packages.

Product Scope

E4 Industrial supplies Worcester® control valve and valve automation products: the CPT characterized seat control valve, electric and pneumatic actuators, switch boxes, position indicators and positioners. Isolation valves are not within our current product scope.

The isolation valve sections on this page are published as technical reference for engineers specifying Worcester automation onto valves they already own or are procuring elsewhere. Quotation requests are handled for control valve and automation products only. For isolation valve supply, contact Flowserve or your existing valve distributor.

Worcester Controls Product Catalog

The complete Flowserve catalog covering every series on this page, with pressure and temperature charts, dimensional data and the full options list. Each product card below also cites its individual Flowserve brochure and IOM numbers, which can be searched by literature number at flowserve.com/library at no charge.

Download The Catalog (PDF)

How To Select A Worcester® Body Style

Body style, port size and end connection are decided before anything else. Here is the logic.

Every other decision on a ball valve follows from three choices made at the start: how the body is constructed, whether the bore is full or regular port, and how it connects to the pipe. Get those right and material selection and actuation follow naturally. Get them wrong and you are replacing the valve, not adjusting it.

Three-Piece Versus Flanged Versus Wafer

Three-piece construction separates into a centre body and two end pieces. The valve acts as both a valve and a union, so the centre section carrying the ball and seats can be removed for service without disturbing the pipework or breaking the end connections. On a valve that will be rebuilt rather than replaced, and on any line where cutting out a welded valve would be a project, three-piece pays for itself the first time it is serviced. Worcester covers 1/4 in through 6 in across the Series 44, 59 and 45/59.

Flanged construction bolts to mating pipe flanges and is the default where the plant specification calls for flanged connections throughout, where the valve must be removable as a unit, or where sizes exceed the three-piece range. Worcester offers unibody flanged in regular and full port and a split body flanged option carrying API 6D and NACE. Sizes run to 10 in.

Wafer construction clamps between flanges with no flanges of its own, which is what makes the Series 151 and 301 40 to 60 percent lighter than a conventional ball valve of the same size. On elevated pipework and long unsupported spans that weight saving is a structural consideration, not a convenience.

Full Port Versus Regular Port

A full port bore matches the inside diameter of the pipe. A regular port bore is one nominal size smaller. Regular port is smaller, lighter, cheaper, and requires less actuator torque, and it is the correct default for isolation service where the valve spends its life either fully open or fully closed and the pressure drop across a fully open valve is negligible against total system loss.

Full port earns its cost in three situations. Where the line is continuously flowing and the accumulated pressure drop becomes a real pumping cost over years. Where the media is viscous, fibrous or slurried and a step change in bore causes deposition. And where the line must be pigged or cleaned in place, since anything less than full bore stops the pig.

Live Loaded Stem Seals

Most Worcester series carry a live loaded stem seal, and the Series 94 carries a double live loaded design. Packing relaxes and compresses over thousands of cycles and thermal excursions, and on a conventional gland the load decays until the valve becomes a leak path. Live loading uses spring elements to maintain packing compression as the packing consolidates, which is what converts a valve from a scheduled repacking item into a valve that holds its stem seal for its service life. On fugitive emission service this is not a refinement, it is the entire mechanism.

Cavity Filled And Vented Ball Designs

A standard ball valve traps media in the body cavity behind the ball when it is closed. Depending on the service, that trapped volume causes three different problems: it holds product that will not drain in sanitary service, it polymerises or solidifies in some chemical service, and in cryogenic or liquefied gas service it vaporises as it warms and generates pressure capable of damaging the valve. Worcester answers all three. Cavity filled designs eliminate the void. The cryogenic C4, C44 and C51 use a V3 vent hole for positive ball and cavity relief. The chlorine CL series vents the ball to the high pressure side.

Three-Piece Ball Valves

Serviceable in line, from 1/4 inch through 6 inch. The valve acts as both a valve and a union.

Series 44

3-Piece Regular Port Ball Valve

A three-piece regular port ball valve to ASME class 600 design, meeting ASME B16.34 requirements. The live loaded stem seal design maintains packing load as the packing relaxes over thousands of cycles, which is what keeps a valve from becoming a fugitive emission source in year three. Cavity filled designs are available where trapped media is a concern, and a locking device is standard.

Key Features

Three-piece regular port design, ASME class 600
Meets ASME B16.34 requirements, consult pressure and temperature charts
Live loaded stem seal design
Multiple soft and metal seat options
Tight shut off and bi-directional sealing
Cavity filled designs available
Special service approvals including UL, FM, and USCG
Locking device as standard

Sizes	1/4 in to 2 in
End Connections	Screwed, socket weld, butt weld and solder ends (brass only)
Materials	Carbon steel, stainless steel, brass, Monel, Alloy 20, Hastelloy-C
Standards	ASME B16.34, screwed end to ASME B2.1, socket weld to ASME B16.11

Typical ApplicationsGeneral process isolation, utility service, OEM and packaged equipment, and applications requiring UL, FM, or USCG approval.

Flowserve® literature: brochure WCABR1050, IOM WCENIM2030

Reference only. Isolation valves are outside E4 Industrial's current product scope.

Series 59

3-Piece Full Port Ball Valve

The full port counterpart to the Series 44. A full port bore matches the pipe inside diameter, which minimizes pressure drop across the valve, maintains system efficiency, and reduces pumping cost over the life of the installation. On a valve that sits in a continuously flowing line, that pressure drop is a real operating expense rather than a specification detail.

Key Features

Three-piece full port design, ASME class 600
Meets ASME B16.34 requirements, consult pressure and temperature charts
Live loaded stem seal
Multiple soft and metal seat options
Tight shut off and bi-directional sealing
Cavity filled designs available
Full port design minimizes pressure drop and reduces pumping cost
Locking device as standard

Sizes	1/4 in to 2 in
End Connections	Screwed, socket weld, butt weld and solder ends (brass only)
Materials	Carbon steel, stainless steel, brass, Monel, Alloy 20, Hastelloy C
Standards	ASME B16.34, screwed end to ASME B2.1, socket weld to ASME B16.11

Typical ApplicationsContinuous flow service where pressure drop matters, slurry and viscous media, pigging and cleaning lines, and general process isolation.

Flowserve literature: brochure WCABR1050, IOM WCENIM2030 (Miser) and WCENIM2054 (FM)

Reference only. Isolation valves are outside E4 Industrial's current product scope.

Worcester Series 45 and 59 large diameter three-piece ball valve

Series 45 / 59

3-Piece Larger Sizes

Large diameter three-piece ball valves to ASME Class 300. The three-piece construction allows the valve to act as both a valve and a union, which means the centre section can be removed for service without disturbing the pipework or the end connections. On a packaging line or OEM skid where downtime is measured in minutes, that matters more than the valve specification.

Key Features

Large diameter three-piece design, ASME Class 300
Three-piece design allows the valve to act as a valve and a union
Large diameter bore for OEM equipment and packaging systems
Compact design with multiple options
Tight shut off and bi-directional sealing
Cavity filled designs available

Sizes	Series 45: 2-1/2 in to 6 in. Series 59: 2-1/2 in to 4 in
End Connections	Screwed, socket weld, butt weld
Materials	Carbon steel, stainless steel
Standards	ASME B16.34, screwed end to ASME B2.1, socket weld to ASME B16.11

Typical ApplicationsOEM equipment, packaging systems, larger diameter process isolation where in-line serviceability is required.

Flowserve literature: brochure WCABR1050, IOM WCENIM2046

Reference only. Isolation valves are outside E4 Industrial's current product scope.

Flanged Ball Valves

Unibody regular port, unibody full port, and split body with API 6D and NACE. To 10 inch.

Series 51 / 52

Flanged Regular Port Unibody

A flanged regular port unibody ball valve in ASME class 150 and 300, and the workhorse of the Worcester® flanged range. Pre-drilled mounting holes for actuation come standard, which removes the bracket engineering step that adds cost and lead time on most flanged automation packages. Body, seat, and seal material breadth is what makes it dependable across steam, petroleum products, chemicals, and abrasive liquids.

Key Features

Flanged regular port unibody design, ASME class 150 and 300
Tight shut-off with bi-directional sealing
Live loaded stem seal
Multiple soft and metal seat options
Wide variety of body, seat and seal materials for dependable high cycle control
Pre-drilled mounting holes for actuation

Sizes	1/2 in to 10 in flanged
Pressure Class	ASME 150# and 300#
Materials	Carbon steel, stainless steel
Standards	ASME B16.34

Typical ApplicationsSteam, petroleum products, chemicals and abrasive liquids. High cycle control service and automated valve packages across general process plant.

Flowserve® literature: brochure WCABR1013, IOM WCENIM2014 (small), WCENIM2015 (large), WCENIM2052 (FM)

Reference only. Isolation valves are outside E4 Industrial's current product scope.

Series F519 / F529

Flanged Full Port Unibody

A flanged full port unibody valve with ISO 5211 mounting as standard and firesafe by design construction. ISO 5211 on the valve is the detail that determines whether automation is a bolt-on or a custom bracket exercise, and it is worth confirming at valve selection rather than discovering at actuator selection.

Key Features

Flanged full port unibody design, ASME class 150 and 300
ISO 5211 mounting as standard
Live loaded stem seal
Multiple soft and metal seat options
Full port design minimizes pressure drop and reduces pumping cost
Wide material range for high cycle control on steam, petroleum products, chemicals and abrasive liquids
Firesafe by design

Sizes	1/2 in to 1-1/2 in
Pressure Class	ASME 150# and 300#
Materials	Carbon steel, stainless steel
Standards	ASME B16.34, API 607 fire test

Typical ApplicationsFiresafe process isolation, hydrocarbon service, and automated packages where ISO 5211 direct mounting is specified.

Flowserve literature: brochure WCENBR0032, IOM WCEIM0519

Reference only. Isolation valves are outside E4 Industrial's current product scope.

Series F819 / F829

Flanged Full Port Split Body

A flanged full port split body valve carrying the heaviest standards package in the Worcester flanged range: API 6D, API 607 4th Edition, ASME B16.34, and NACE MR01-75. That combination is the specification language of pipeline, upstream, and sour service, and it is the reason this series appears on hydrocarbon requisitions where the others will not qualify.

Key Features

Flanged full port split body design, ASME class 150 and 300
ISO 5211 mounting as standard
Full port design minimizes pressure drop and reduces pumping cost
Wide variety of body, seat and seal materials for high cycle control
NACE MR01-75 compliant for sour service

Sizes	2 in to 8 in
Pressure Class	ASME 150# and 300#
Materials	Carbon steel, stainless steel
Standards	API 6D, API 607 4th Edition, ASME B16.34, NACE MR01-75

Typical ApplicationsPipeline and midstream isolation, upstream production, sour service, refinery and petrochemical units requiring API 6D.

Flowserve literature: brochure WCENBR0032, IOM WCENIM0013 (standard), WCENIM2057 (fugitive emission)

Reference only. Isolation valves are outside E4 Industrial's current product scope.

Wafer Pattern And Directional Valves

Light weight wafer isolation, and multi-port diverter valves with up to five ports.

Series 151 and 301

Wafer Pattern Ball Valve

A wafer pattern design weighing 40 to 60 percent less than a conventional ball valve of the same size and rating. The body is symmetrically balanced to avoid the side loads that actuation imposes on an asymmetric wafer body, which is why this pattern survives automation where lighter wafer designs do not.

Key Features

Wafer design, engineered for light weight
40 to 60 percent less weight than conventional ball valves
Symmetrically balanced to avoid side loads from actuation
Suitable for steam processes including vegetable peelers, steam ejectors and distilleries

Sizes	3 in to 6 in
Pressure Class	ASME 150# and 300#
Rating	720 CWP
Materials	Bronze, carbon steel, stainless steel, ductile iron

Typical ApplicationsSteam service, vegetable peelers, steam ejectors, distilleries, and weight-constrained installations.

Flowserve® literature: brochure WCABR1041, IOM WCENIM2015

Reference only. Isolation valves are outside E4 Industrial's current product scope.

Worcester Series D44 D4 D51 and 18 19 directional multiport diverter valve

Series D44 / D4, D51, 18 / 19

Directional And Multi-Port Diverter Valves

Multi-port diverter valves in three-piece or flanged design, with bottom entry or side entry and 90 or 180 degree operation. The D44 and D4 three-piece diverter accepts media through a bottom inlet port and directs it to either of two outlet ports. The D51 cast flanged version performs the same function in larger sizes. The 18 and 19 Series is the most adaptable of the three, supporting up to five ports.

Key Features

Multi-port diverter valves, three-piece or flanged design
Bottom entry or side entry, full port or regular port
90 or 180 degree operation
D44 and D4 accept media through a bottom inlet and direct it to either of two outlets
D51 cast flanged for larger sizes with similar operation
Series 18 and 19 supports up to five ports, multiple seat and body materials, regular or full port
Optional fugitive emission design on Series 18 and 19

Sizes	D44 / D4 three-piece: 1/2 in to 2 in. D51 flanged: 2 in to 8 in. Series 18 and 19: 1 in to 6 in
Pressure Class	ASME 150 flanges. Series 18 and 19 class 150 or 300
End Connections	Screwed, socket or butt weld and slip-on flanges on Series 18 and 19
Materials	Carbon steel, stainless steel
Standards	ASME B16.34, API 607 fire test

Typical ApplicationsDiverting and blending service, sampling systems, batching, tank switching, and any application requiring flow to be directed between multiple outlets.

Flowserve literature: brochure WCABR1052, IOM WCENIM2030 (Miser), WCENIM2015 (large), WCENIM0009 (18/19)

Reference only. Isolation valves are outside E4 Industrial's current product scope.

Special Service Valves

Fugitive emission, chlorine, firesafe and cryogenic. Where a general purpose valve will not qualify.

Four service categories in the Worcester® range require construction that a general purpose valve cannot provide, and in each case the requirement is written into a standard rather than left to judgment. Fugitive emission control is governed by the plant's LDAR program and by ASME B31.3 Category M for the most hazardous fluids. Chlorine service follows Chlorine Institute Pamphlet 6. Firesafe follows API 607 and, for the FM listed variants, FM 7440. Cryogenic is defined by the temperature itself and by what happens to packing, seats and trapped liquid at -425 degrees F.

The important point across all four is that these are not one-off specials. Worcester offers each as a variant across the standard body styles, which means the firesafe or fugitive emission version of a valve you already use carries the same face-to-face dimensions, the same mounting, and the same spare parts logic as the standard version.

Worcester Series 94 fugitive emission ball valve

Series 94, 94-150, 94-300, 94-600

Fugitive Emission Control

Specifically designed to control and minimize fugitive emissions, with a double live loaded stem seal design and outstanding performance on high-cycle applications where no stem leakage is allowed. Suitable for Category M services, which is the ASME B31.3 designation for fluids so toxic that a single exposure to a small quantity can cause serious irreversible harm. High vacuum capability is included.

Key Features

Specially designed to control and minimize fugitive emissions
Outstanding performance on high-cycle applications where no stem leakage is allowed
Double live loaded stem seal design
High vacuum capability
High cycle capability
Suitable for Category M services

Sizes	1/2 in to 2 in three-piece, 1/2 in to 8 in flanged
End Connections	Screwed, socket weld, butt weld
Pressure Class	To ASME 600
Materials	Carbon steel, stainless steel, Hastelloy-C trim option
Standards	ASME B16.34, screwed end to ASME B2.1, socket weld to ASME B16.11, API 607 fire test

Typical ApplicationsFugitive emission control, Category M service, high cycle process valves, high vacuum systems, and any service where stem leakage is unacceptable.

Flowserve® literature: brochure WCABR1023, IOM WCENIM2003 (Series 94), WCENIM2057 (Series E818/828)

Reference only. Isolation valves are outside E4 Industrial's current product scope.

Series CL94, CL44, CL51 / 52

Chlorine Service

Purpose-built for chlorine service in both liquid and gas phase, constructed in accordance with the recommendations of the Chlorine Institute including special testing, cleaning, and packaging. A relief vent in the ball vents to the high pressure side, which prevents the trapped liquid chlorine in the ball cavity from generating destructive pressure as it warms. Assembled in a Class 1000 clean room.

Key Features

Special construction for chlorine service, liquid and gas
Relief vent in ball vents to the high pressure side
Built to Chlorine Institute recommendations including special testing, cleaning and packaging
Available with 94 FEM stem design
Assembled in Class 1000 clean room

Sizes	1/2 in to 2 in three-piece, 1/2 in to 4 in flanged
End Connections	Screwed, socket weld, butt weld
Pressure Class	To ASME 600
Materials	Carbon steel with Monel trim
Standards	ASME B16.34, Chlorine Institute Pamphlet 6, MSS-SP-72, B31.1, B31.3

Typical ApplicationsChlorine production, storage and handling, water treatment chlorination, chlor-alkali plants, and chemical processing using liquid or gaseous chlorine.

Flowserve literature: brochure WWCABR1039, IOM WCENIM2003, WCENIM2014, WCENIM2015, WCENIM2030

Reference only. Isolation valves are outside E4 Industrial's current product scope.

Worcester firesafe ball valve series AF44 FZ44 AF51 52 FZ51 52 FM51 52 AF94 FZ94

Series AF, FZ and FM

Firesafe Valves

Firesafe valves engineered to ensure operational integrity before, during, and after a fire. Certification covers API 607 fire test, EXES 3-14-1-2A, and FM 7440. The range spans the AF44, FZ44, AF51/52, FZ51/52, FM51/52, AF94, FZ94, F519/529, and F819/829 series, so a firesafe option exists across essentially the full Worcester body style range rather than in one isolated model.

Key Features

Firesafe construction across the three-piece and flanged range
Ensures operational integrity before, during, and after a fire
Tight shut off, anti-static, no external leakage
Available with 94 FEM stem design
Pressure classes to ASME 600

Series	AF44, FZ44, AF51/52, FZ51/52, FM51/52, AF94, FZ94, F519/529, F819/829
Sizes	1/2 in to 2 in three-piece, 1/2 in to 10 in flanged
End Connections	Screwed, socket weld, butt weld
Pressure Class	To ASME 600
Standards	ASME B16.34, API 607 fire test, EXES 3-14-1-2A, FM 7440

Typical ApplicationsHydrocarbon processing, refinery and petrochemical units, tank farms and terminals, LPG and LNG handling, and any service where a fire scenario appears in the hazard analysis.

Flowserve literature: brochure WCABR1029, IOM WCENIM2003, 2014, 2015, 2020, 2030, 2047, 2052, 2054, 2057

Reference only. Isolation valves are outside E4 Industrial's current product scope.

Worcester Series C4 C44 C51 cryogenic ball valve with bonnet extension

Series C4, C44 and C51

Cryogenic Service

High-performance shutoff valves for intermittent and continuous flow applications at temperatures down to -425 degrees F. Positive ball and cavity relief through a V3 vent hole prevents trapped cryogenic liquid from generating destructive pressure as it vaporizes, and effective bonnet extensions keep the packing above the cold zone so it stays flexible. Designed for low thermal stress, automation, and fire safety, and assembled in a Class 1000 clean room.

Key Features

Cryogenic service to -425 degrees F
High performance shutoff for intermittent and continuous flow
Positive ball and cavity relief with V3 vent hole
Zero leak packing
Effective bonnet extensions
Designed for low thermal stress, automation and fire safety
Assembled in Class 1000 clean room

Sizes	1/2 in to 2 in three-piece, 1/2 in to 6 in flanged
End Connections	Screwed, socket weld, butt weld
Pressure Class	To ASME 600
Materials	Brass, stainless steel
Standards	ASME B16.34, API 607 fire test

Typical ApplicationsIndustrial gases, LNG, liquid nitrogen, oxygen and argon service, air separation plants, and cryogenic storage and transfer.

Flowserve literature: brochure WCABR1040, IOM WCENIM2006 (R12/R6 or earlier), WCENIM2038 (standard)

Reference only. Isolation valves are outside E4 Industrial's current product scope.

High Purity And Tank Bottom Valves

ASME BPE, FDA 21CFR, USP VI and USDA compliant valves for sanitary and aseptic process.

High purity valve selection turns on details that never appear on an industrial datasheet. Interior surface finish at 20Ra standard or 15Ra electropolished determines whether product adheres to the wetted surface. Controlled ferrite, below 1 percent on forged and below 5 percent on cast, governs corrosion behaviour and magnetic permeability. Controlled sulfur is what allows the valve to be orbital welded into a system without weld penetration problems. Class 100 clean room assembly keeps particulate out of a valve that will be installed into a validated system. And CMTRs provide the material traceability that the validation package requires.

Series WK70

High Purity, Forged F316L

A high purity three-piece valve in forged F316L with a tube bore, assembled in a Class 100 clean room. Ferrite is controlled below 1 percent and sulfur is controlled for orbital welding, which is the detail that determines whether the valve welds cleanly into an automated orbital weld system or fights it. CMTRs are supplied.

Key Features

High purity, forged F316L with tube bore
Class 100 clean room assembly
20Ra interior surface finish standard, 15Ra electropolished available
Controlled ferrite below 1 percent
Controlled sulfur for orbital welding
CMTRs supplied

Sizes	1/2 in to 2 in three-piece
End Connections	Extended butt weld, hygienic clamp
Materials	ASTM A182 F316L, ASTM A479
Seats and Seals	PTFE, Polyfill
Standards	ASME BPE, FDA 21CFR, USP VI, USDA

Typical ApplicationsPharmaceutical and biotech, microelectronics, steam distribution and distillation, fermentation, lyophilization, food and beverage.

Flowserve® literature: brochure WCABR1036, IOM WCAIM2018

Reference only. Isolation valves are outside E4 Industrial's current product scope.

Series WK74

High Purity, Cast 316L

The larger companion to the WK70, in cast A351-CF3M rather than forged, covering 3 in to 4 in. Same Class 100 clean room assembly, same 20Ra interior finish, with ferrite controlled below 5 percent reflecting the cast rather than forged metallurgy. CMTRs are standard.

Key Features

High purity, cast 316L with tube bore
Class 100 clean room assembly
20Ra interior surface finish standard, 15Ra electropolished available
Controlled ferrite below 5 percent
Controlled sulfur for orbital welding
CMTRs standard

Sizes	3 in to 4 in three-piece
End Connections	Extended butt weld, hygienic clamp
Materials	ASTM A351-CF3M, ASTM A479
Seats and Seals	PTFE, Polyfill
Standards	ASME BPE, FDA 21CFR, USP VI, USDA

Typical ApplicationsHigh purity and aseptic processes, sterile steam, high purity water, fermentation, lyophilization, food processing.

Flowserve literature: brochure WCABR1037, IOM WCAIM2018

Reference only. Isolation valves are outside E4 Industrial's current product scope.

Series TB59

Tank Bottom Drain Valve

A flush tank bottom drain valve that carries the Worcester® three-piece design advantages into a tank bottom end piece. Flush mounting eliminates the dead leg below a vessel where product pools, will not drain, and becomes a contamination and cleaning problem. Available prepared for oxygen and vacuum service.

Key Features

Flush tank bottom drain valve
Worcester three-piece design advantages with a tank bottom end piece
Available prepared for oxygen and vacuum service
Pressure classes to ASME 300

Sizes	1 in to 4 in three-piece
End Connections	Screwed, socket weld, butt weld
Pressure Class	To ASME 300

Typical ApplicationsBiotech, pharmaceutical, food, chemical and cosmetic processing. Vessel and reactor drain service where flush mounting is required.

Flowserve literature: brochure WCENBR1028, IOM WCENIM2001

Reference only. Isolation valves are outside E4 Industrial's current product scope.

High Pressure And Control Valves

Resilient seated valves to 5,000 psi and ASME Class 2500, plus the CPT characterized seat control valve.

Series 4, H44 and PT

High-per Mizer High Pressure Valves

Resilient seated valves for high pressure and high temperature applications, rated above ASME 600 and up to 5,000 psi. A resilient seat at 5,000 psi is an unusual combination: it delivers bubble-tight shutoff at pressures normally reserved for metal-seated designs, which is why this family appears in hydraulics and CNG service where a metal seat would leak.

Key Features

High pressure resilient seated valves
High temperature applications
Pressures above ASME 600 to 5,000 psi
Used in steam, hydraulics, gasses, fluids and CNG

Sizes	1/2 in to 2 in three-piece, 1/2 in to 6 in flanged, 3 in to 6 in wafer
End Connections	Screwed, socket weld, butt weld
Pressure	Above ASME 600 to 5,000 psi
Standards	ASME B16.34, screwed end to ASME B2.1, socket weld to ASME B16.11

Typical ApplicationsSteam, hydraulic systems, compressed gas, CNG service, and high pressure process isolation.

Flowserve® literature: brochure WCABR1051, IOM WCENIM2015 (large 51/52), WCENIM2030 (Miser)

Reference only. Isolation valves are outside E4 Industrial's current product scope.

Series H71

Hydromizer High Pressure Valve

The top of the Worcester® pressure range, in ASME Class 1500 for 1 in and 2 in and ASME Class 2500 for 1/2 in and 3/4 in. Subsea service is within scope alongside steam, hydraulics, and CNG. Pressure and temperature curves carry limitations at these classes, so the brochure should be consulted rather than assumed.

Key Features

High pressure resilient seated valves
High temperature applications
ASME Class 1500 for 1 in to 2 in
ASME Class 2500 for 1/2 in and 3/4 in
Used in steam, hydraulics, gasses, fluids, CNG and subsea

Sizes	1/2 in to 2 in three-piece
End Connections	Screwed, socket weld, butt weld
Pressure Class	ASME 1500 and ASME 2500
Standards	ASME B16.34, screwed end to ASME B2.1, socket weld to ASME B16.11

Typical ApplicationsSubsea systems, high pressure hydraulics, CNG, steam service, and pressure classes above the standard flanged range.

Flowserve literature: brochure WCABR1051, IOM WCENIM2024

Reference only. Isolation valves are outside E4 Industrial's current product scope.

Series CPT

Characterized Seat Control Valve

A characterized seat control valve that turns a quarter-turn ball valve into a genuine modulating control element. Custom-cut characterized seats shape the flow curve rather than relying on ball position alone, delivering high rangeability and precision control with zero external leakage. The efficient shearing action makes it viable on media that would foul a globe valve trim.

Key Features

Characterized seat control valve with a revolutionary design
Precision control at high capacity
Zero external leakage
High cycle capacity
Custom-cut characterized seats
High rangeability
Efficient shearing action

Sizes	1/2 in to 2 in three-piece, 1/2 in to 4 in flanged, 3 in to 6 in wafer
End Connections	Screwed, socket and butt weld
Pressure Class	To ASME 600, consult literature
Standards	ASME B16.34, screwed end to ASME B2.1, socket weld to ASME B16.11

Typical ApplicationsModulating flow control, pulp and paper stock control, slurry and fibrous media, and control service where a globe valve trim would foul or erode.

Flowserve literature: brochure WCABR1001, IOM WCENIM2009 (Series 94), WCENIM2040 (Series 44, 51, 52)

Request Series CPT Quote

Worcester® Valve Selection Table

Every valve series in the range, side by side. Use this to shortlist before specifying.

Series	Body Style	Sizes	Pressure Class	Key Standards	Specify When
Series 44	Three-piece, regular port	1/4 in to 2 in	To ASME 600	ASME B16.34	General isolation, UL / FM / USCG approval required
Series 59	Three-piece, full port	1/4 in to 2 in	To ASME 600	ASME B16.34	Continuous flow, viscous or slurried media, pigged lines
Series 45 / 59	Three-piece, larger sizes	2-1/2 in to 6 in	ASME 300	ASME B16.34	OEM and packaging equipment, in-line serviceability
Series 51 / 52	Flanged unibody, regular port	1/2 in to 10 in	ASME 150 / 300	ASME B16.34	Flanged plant standard, automated packages, high cycle
Series F519 / F529	Flanged unibody, full port	1/2 in to 1-1/2 in	ASME 150 / 300	ASME B16.34, API 607	Firesafe by design with ISO 5211 direct mounting
Series F819 / F829	Flanged split body, full port	2 in to 8 in	ASME 150 / 300	API 6D, API 607, NACE MR01-75	Pipeline, upstream, sour service
Series 151 / 301	Wafer pattern	3 in to 6 in	ASME 150 / 300, 720 CWP	Rated 720 CWP	Weight-constrained installations, steam service
D44 / D4, D51, 18 / 19	Directional, multi-port	1/2 in to 8 in	ASME 150 / 300	ASME B16.34, API 607	Diverting, blending, sampling, up to five ports
Series 94	Fugitive emission	1/2 in to 8 in	To ASME 600	ASME B16.34, API 607	LDAR programs, Category M service, high vacuum
Series CL94 / CL44 / CL51-52	Chlorine service	1/2 in to 4 in	To ASME 600	Chlorine Institute Pamphlet 6, MSS-SP-72	Liquid or gaseous chlorine
Series AF / FZ / FM	Firesafe	1/2 in to 10 in	To ASME 600	API 607, EXES 3-14-1-2A, FM 7440	Fire scenario in the hazard analysis
Series C4 / C44 / C51	Cryogenic	1/2 in to 6 in	To ASME 600	ASME B16.34, API 607	Down to -425 °F, LNG and industrial gases
Series WK70	High purity, forged 316L	1/2 in to 2 in	Sanitary	ASME BPE, FDA 21CFR, USP VI	Pharmaceutical, biotech, microelectronics
Series WK74	High purity, cast 316L	3 in to 4 in	Sanitary	ASME BPE, FDA 21CFR, USP VI	Larger sanitary and aseptic process lines
Series TB59	Tank bottom drain	1 in to 4 in	To ASME 300	Worcester three-piece design	Flush vessel drain, no dead leg permitted
Series 4 / H44 / PT	High pressure	1/2 in to 6 in	Above ASME 600 to 5,000 psi	ASME B16.34	Hydraulics, CNG, high pressure steam
Series H71	High pressure Hydromizer	1/2 in to 2 in	ASME 1500 and 2500	ASME B16.34	Subsea, highest pressure classes
Series CPT	Characterized seat control	1/2 in to 6 in	To ASME 600	ASME B16.34	Modulating control, fibrous or fouling media

Sizes and pressure classes reflect published Worcester catalog data. Confirm the pressure and temperature curve for your specific material and seat combination before finalizing, since the class rating and the actual allowable working pressure at temperature are not the same number.

Worcester® Electric Actuators

Compact through 3,000 in-lbs, plus a self-contained electro-hydraulic fail-safe operator.

The Worcester electric range is deliberately narrow and covers three distinct jobs. The Series 36 is the compact OEM unit at 150 and 550 in-lb with a timer option for unattended cycling. The Series 75 is the general-purpose platform to 3,000 in-lbs with manual override, optional fail-safe and optional integral positioners and PID control. The Series F72 is an electro-hydraulic operator that solves the one thing a conventional electric actuator cannot: a genuine fail-safe stroke on power loss.

The F72 deserves particular attention because of what it does not contain. There is no hydraulic reservoir, so it mounts in any orientation rather than requiring a specific attitude. There are no clutches, no battery packs and no clock springs, which are the three components that most commonly fail on fail-safe electric actuators and the reason many plants stopped specifying them. Simple two-wire control and FM approval complete the package.

Series 36

Compact Electric Actuator

A compact electric actuator with a permanently lubricated and sealed gear train, thermal overload protection, and simple mounting. The solid-state timer option for automatic cycling is what distinguishes it in OEM service, where a valve needs to stroke on a fixed interval without a controller in the loop. Condensate draining and air dryer regeneration are exactly that pattern.

Key Features

Compact size
Permanently lubricated and sealed gear train
Thermal overload protection
Simple mounting and installation
Additional output switch
Solid-state timer option for automatic cycling

Torque	150 in-lb and 550 in-lb output torques
Temperature	0 °F to 150 °F
Supply Voltage	120, 240 VAC
Enclosure	NEMA 1, 4 and 4X

Typical ApplicationsIndustrial quarter-turn ball valves. OEM installations including air drying equipment, sampling systems, compressor installations, condensate draining and tank draining.

Flowserve® literature: brochure WCABR1006 (36 Series), WCABR1007 (36T Series), IOM WCAIM2007

Request Series 36 Quote

Series 75

Electric Actuator With Fail-Safe Option

A broader electric platform reaching 3,000 in-lbs with a manual override, thermal overload protection, and reversible rotary operation as standard. Optional fail safe capability, extended duty cycle motors, and integrated positioners and PID controllers move it from on/off isolation into genuine modulating control. The hard anodised coating option addresses corrosive plant atmospheres.

Key Features

Two year warranty
Baked epoxy coated
Permanently lubricated gear train
Manual override
Thermal overload protection
Reversible rotary operation
Optional extended duty cycle motors and fail safe capability
Optional positioners and PID controllers
Optional hard anodised coating

Torque	150 to 3,000 in-lbs
Temperature	-40 °F to 150 °F
Supply Voltage	120, 240 VAC and 12, 24 VDC
Enclosure	NEMA 4, 4X
Hazardous Area	Class 1, Div 1, Groups C and D

Typical ApplicationsProcess control for rotary valves, dampers and multi-turn chokes. Boiler feed water, temperature control on steam and thermal fluid, chemical, power, water and wastewater, food and beverage, HVAC.

Flowserve literature: brochure WCABR1014, IOM WCAIM2013

Request Series 75 Quote

Series F72

Electro-Hydraulic Actuator

A self-contained electro-hydraulic actuator that is fail-safe on power failure with a fast closure stroke. The design has no hydraulic reservoir, which means it mounts in any orientation, and no clutches, battery packs or clock springs, which removes the three components that most often fail on competing fail-safe electric designs. Simple two-wire control and FM approval.

Key Features

Fail-safe on power failure
Fast moving valve closure
Long operational life
No hydraulic reservoir, mounts in any position
No clutches, battery packs or clock springs
Simple two-wire control
Two year warranty
FM approved

Torque	Up to 900 in-lbs at end of spring
Temperature	0 °F to 150 °F
Supply Voltage	120, 240 VAC and 24 VDC
Enclosure	NEMA 4, 4X
Hazardous Area	Class 1, Div 1, Groups B, C and D. FM 7411

Typical ApplicationsOil and gas safety shut off, tank farms, water and wastewater, burner management, oil field steam generators, dampers.

Flowserve literature: brochure WCENBR1022, IOM WCAIM2049

Request Series F72 Quote

Worcester® Pneumatic Actuators

Compact scotch yoke, twin piston rack and pinion to 60,000 in-lbs, and a fully integrated actuator.

Three pneumatic platforms with genuinely different design intents. The Series 34 is a compact scotch yoke with a built-in solenoid air pilot and single external air and electrical connections, engineered for OEM and space-constrained installations. The Series F39 is the high cycle twin piston double rack and pinion workhorse reaching 60,000 in-lbs. ACCESS integrates the solenoid and position switch into the actuator itself, eliminating mounting brackets and reducing the whole assembly to one item with one electrical connection.

The choice between F39 and ACCESS is mostly about how you buy and maintain. F39 with separate accessories gives you flexibility in solenoid and switch selection and lets you stock those parts across multiple actuator brands. ACCESS gives you a lower installed cost, a smaller footprint, no bracket engineering and a diagnostic LED board, at the cost of that flexibility. On a large valve population with a standardized accessory list, ACCESS usually wins on total installed cost.

Series 34

Compact Scotch Yoke Pneumatic Actuator

A compact scotch yoke pneumatic actuator with a built-in solenoid air pilot and a single external air and electrical connection. Consolidating the air and electrical entries into one point each removes the conduit and tubing congestion that makes a conventional actuator and solenoid assembly difficult to service in a tight pipe rack. Minimum air consumption and adjustable speed control are standard.

Key Features

Compact scotch yoke design
Baked epoxy coating
Minimum air consumption
Adjustable speed control
Single external air and electrical connections
Fail-safe spring return option
Built-in solenoid air pilot
High temperature option

Torque	Up to 1,000 in-lbs at 100 psi input
Temperature	-25 °F to 160 °F, optional to 250 °F
Supply Voltage	12, 24 VDC and 24, 120, 240, 480 VAC
Enclosure	NEMA 1, 4, 4X
Hazardous Area	Class 1, Div 1, Groups A, B, C and D

Typical ApplicationsIndustrial quarter-turn valve automation, automotive, OEM, chemical and water service.

Flowserve® literature: brochure WCENBR1004, IOM WCAIM2008

Request Series 34 Quote

Series F39

Rack And Pinion Pneumatic Actuator

A twin piston double rack and pinion actuator in an extruded, anodized aluminum body, reaching 60,000 in-lbs at 120 psi. Polished stainless steel guide rods and multi-spring force transfer are the high-cycle details. NAMUR and ISO mounting with end cap air supply ports and end mount solenoid and switch accessories mean the accessory package assembles without tubing runs.

Key Features

High performance, high cycle design
Two year warranty
Twin piston, double rack and pinion
Extruded, anodized aluminum body
NAMUR and ISO mounting
Polished stainless steel guide rods
Multi-spring force transfer
End cap air supply ports
End mount solenoid and switch accessories
Limit stops

Torque	Up to 60,000 in-lbs at 120 psi input
Temperature	-40 °F to 212 °F, high temperature option to 300 °F
Supply Voltage	12, 24 VDC and 24, 120, 240 VAC
Pressure Range	30 to 120 psi double acting, 40 to 120 psi spring return
Enclosure	NEMA 1, 4, 4X
Hazardous Area	Class 1, Div 1, Groups A, B, C and D

Typical ApplicationsChemical, petrochemical and refining, power, oil and gas, food and beverage.

Flowserve literature: brochure WCENBR1003, IOM WCENIM2036

Request Series F39 Quote

ACCESS

Integrated Pneumatic Actuator

A fully integrated actuator with the solenoid and position switch built in, driven through a single electrical connection with no mounting brackets required. A high flow spool valve, manual override and speed control, and a diagnostic LED circuit board are on board. Where a conventional package is an actuator plus a solenoid plus a switch box plus brackets plus tubing, this is one item with one wire.

Key Features

Integral solenoid and position switch
Single electrical connection
High flow spool valve
Manual override and speed control
No mounting brackets required
Diagnostic LED circuit board
Digital bus networks

Torque	Up to 60,000 in-lbs at 120 psi input
Position Switch	SPDT / DPDT, gold contact, proximity
Temperature	0 °F to 160 °F
Supply Voltage	12, 24 VDC and 24, 120, 240 VAC
Pressure Range	40 to 120 psi
Enclosure	NEMA 4, 4X
Hazardous Area	Class 1, Div 1, Groups B, C and D. Intrinsically safe, NRTL/C approved, UL and CSA approved
Protocols	DeviceNet, AS-i and other digital bus networks

Typical ApplicationsDigital bus networks, chemical, petrochemical and refining, oil and gas, food and beverage, pharmaceutical.

Flowserve literature: brochure WCABR1024, IOM WCAIM2027 (standard), WCAIM2028 (intrinsically safe), WCAIM2023 (DeviceNet), WCAIM2032 (AS-i)

Request ACCESS Actuator Quote

Actuator Comparison

The six Worcester® actuator platforms side by side.

Criteria	Series 36	Series 75	Series F72	Series 34	Series F39	ACCESS
Power Source	Electric	Electric	Electric, self-contained hydraulic	Pneumatic	Pneumatic	Pneumatic
Mechanism	Gear train	Gear train	Electro-hydraulic with spring	Scotch yoke	Twin piston rack and pinion	Rack and pinion, integrated
Torque	150 and 550 in-lb	150 to 3,000 in-lbs	Up to 900 in-lbs at end of spring	Up to 1,000 in-lbs at 100 psi	Up to 60,000 in-lbs at 120 psi	Up to 60,000 in-lbs at 120 psi
Fail-Safe	No	Optional	Yes, inherent on power failure	Spring return option	Spring return	Spring return
Temperature	0 to 150 °F	-40 to 150 °F	0 to 150 °F	-25 to 160 °F, optional 250 °F	-40 to 212 °F, optional 300 °F	0 to 160 °F
Enclosure	NEMA 1, 4, 4X	NEMA 4, 4X	NEMA 4, 4X	NEMA 1, 4, 4X	NEMA 1, 4, 4X	NEMA 4, 4X
Hazardous Area	Not rated	Cl. 1 Div. 1 Gr. C, D	Cl. 1 Div. 1 Gr. B, C, D. FM 7411	Cl. 1 Div. 1 Gr. A, B, C, D	Cl. 1 Div. 1 Gr. A, B, C, D	Cl. 1 Div. 1 Gr. B, C, D. Intrinsically safe
Modulating	No	Yes, with positioner or PID option	No, shutdown duty	With positioner	With positioner	With positioner
Best Fit	OEM skids, timed cycling, small valves	General plant on/off and modulating	Fail-safe ESD where only power is available	Compact installations, single-point connections	High cycle, high torque plant service	Large populations, lowest installed cost

Switch Boxes And Valve Controllers

End mount, top mount, explosion-proof, stainless, and integrated fieldbus valve controllers.

A switch box does one job, telling the control system where the valve actually is, and the selection is driven almost entirely by three questions: what the area classification demands, what the environment will do to the enclosure, and whether you want the device to also control the valve.

Every Worcester® top mount box complies with NAMUR VDI/VDE 3845, which eliminates the coupler between the actuator shaft and the switch cams. That is not a small thing. A coupler is an alignment tolerance, a wear part, and the most common cause of a switch box that drifts out of calibration after a few thousand cycles. Removing it removes the failure mode.

Series ELK39

End Mounted Switch Box

An end mounted switch box rather than a top mounted one, which reduces assembly height and installation envelope and eliminates the mounting kit entirely. On a valve in a congested pipe rack or under a low platform, the vertical clearance a top mount consumes is often the constraint that forces a redesign. Die cast aluminum enclosure with CSA and FM approvals.

Key Features

End mount rather than top mount
Reduced assembly height
Reduced installation envelope
Eliminates mounting kits
Multiple switch options
Aluminum enclosure
CSA and FM approvals

Housing	Die cast aluminum, epoxy coated
Enclosure	NEMA 4, 4X, CSA approved
Hazardous Area	Class 1, Div 1, Groups C and D. Class 1, Div 2, Groups E, F and G
Position Switch	SPDT / DPDT, gold contact, proximity
Temperature	0 °F to 160 °F
Switch Ratings	SPDT 15 A at 125, 250, 480 VAC and 0.5 A at 24 VDC. DPDT 10 A at 125, 250 VAC and 0.3 A at 125 VDC. Proximity sensor 5 to 200 mA, 20 to 140 VAC, 10 to 140 VAC, UL listed and CSA certified

Typical ApplicationsRemote position indication, relay device for pumps, alarms and indicator lights, industrial, chemical and petrochemical installations.

Flowserve® literature: brochure WCABR1027, IOM WCAIM2051

Request ELK39 Quote

Series WWS / WWM

Top Mounted Switch Box

A compact, economical, globally certified weatherproof, non-incendive or intrinsically safe package for visual and remote electrical indication. UltraDome visual indicators give high contrast wide angle viewing, and Quick-Set™ spring loaded cams are extra wide and splined to permit tool-free limit switch calibration. Anyone who has calibrated a switch box with a screwdriver in a classified area understands why that matters.

Key Features

UltraDome visual position indicators for high contrast, wide angle viewing
Compliance to NAMUR VDI/VDE 3845, eliminating the coupler and maximizing interchangeability
Captive stainless steel cover screws
Prewired multipoint terminal strip
Quick-Set spring loaded cams, extra wide and splined for tool-free limit switch calibration
Extensive switch offering including mechanical, proximity and solid state feedback

Housing	Die cast aluminum with dichromate conversion undercoat and electrostatic powder top coat, or engineered resin 25 to 33 percent fiberglass filled for harsh corrosive applications
Enclosure	IP66, IP67, NEMA 4, 4X
Hazardous Area	Intrinsically safe ATEX II 1GD Ex ia IIC T4/T5/T6. Intrinsically safe cCSAus Cl. I Div. 1 Gr. A,B,C,D, Cl. II Div. 1 Gr. F,G, Cl. III T3. Non-incendive cCSAus Cl. I Div. 2 Gr. A,B,C,D, Cl. II Div. 2 Gr. E,F,G T3

Typical ApplicationsGeneral plant valve position indication where a globally certified weatherproof or intrinsically safe package is required.

Flowserve literature: brochure WCENBR0135, IOM WCENIM0135

Request WWS/WWM Quote

Series WPS / WPM

Top Mount Switch Box, Engineered Resin

The engineered resin sibling to the WWS and WWM, built specifically for harsh corrosive environments where a die cast aluminum enclosure eventually pits. Fiberglass-filled resin at 25 to 33 percent gives the mechanical strength without the corrosion path, and the certification package adds increased safety ATEX and IECEx intrinsically safe listings alongside analog feedback options.

Key Features

UltraDome visual position indicators for high contrast, wide angle viewing
Compliance to NAMUR VDI/VDE 3845, eliminating the coupler
Captive stainless steel cover screws
Prewired multipoint terminal strip
Quick-Set spring loaded cams for tool-free limit switch calibration
Mechanical, proximity, solid state and analog feedback options

Housing	Engineered resin, 25 to 33 percent fiberglass filled for harsh corrosive applications
Enclosure	IP66, NEMA 4, 4X
Hazardous Area	Intrinsically safe ATEX II 1G Ex ia IIC T4/T5/T6. Increased safety ATEX II 2G Ex e mb IIC T6. Intrinsically safe IECEx Ex ia IIC T4/T5/T6. Intrinsically safe cFMus/cCSAus Cl. I,II,III Div. 1 Gr. A,B,C,D,E,F,G T5. Non-incendive cFMus/cCSAus Cl. I Div. 2

Typical ApplicationsCoastal and offshore installations, chemical processing, wash-down areas, and any environment where a metal enclosure becomes a maintenance item.

Flowserve literature: brochure WCENBR0134, IOM WCENIM2075

Request WPS/WPM Quote

Series WXCL

Explosion-Proof Top Mounted Switch Box

The heavy-duty explosion-proof option, with the widest global certification package in the Worcester switch range. Flameproof ATEX and IECEx, explosion-proof cCSAus, intrinsically safe FM, plus KOSHA and INMETRO listings for Korean and Brazilian installations. If your project has an international scope with mixed certification requirements, this is the enclosure that satisfies all of them from one part number family.

Key Features

UltraDome visual position indicators for high contrast, wide angle viewing
Compliance to NAMUR VDI/VDE 3845
Captive stainless steel cover screws
Prewired multipoint terminal strip
Quick-Set spring loaded cams for tool-free limit switch calibration
Mechanical, proximity, solid state and analog feedback options
Heavy-duty, rugged, globally certified explosion-proof package

Housing	Die cast aluminum with dichromate conversion undercoat and electrostatic powder top coat
Enclosure	IP66, IP67, NEMA 4, 4X, 7 and 9
Hazardous Area	Flameproof ATEX II 2GD Ex d IIB T5, Ex tD A21 IP66/IP67. Flameproof IECEx Ex d IIB T5. Explosion-proof cCSAus Cl. I Div. 1 Gr. C and D. Intrinsically safe FM (US/CAN)/cCSAus Cl. I,II,III Div. 1. KOSHA Ex d IIB T5. INMETRO Ex d IIB T5 Gb

Typical ApplicationsHazardous area installations requiring explosion-proof rather than intrinsically safe protection, and international projects with mixed certification scope.

Flowserve literature: brochure WCENBR1057, specification WCENPS1056, IOM WCENIM2076

Request WXCL Quote

Series DS / DM UltraSwitch™

Compact Top Mounted Switch Box

A compact housing in aluminium or corrosion resistant stainless steel that mounts directly onto actuators for both rotary and linear indication, and doubles as a junction box for direct connection of solenoid valves. Up to three cable entries and pre-wired switches. On a valve population where every assembly currently needs a separate junction box, consolidating the two saves both the box and the conduit run between them.

Key Features

Tool-free Quick-Set cams
Switches available in a wide range of options
Easily accessed pre-wired terminal strip
Minimum two open terminals provided
Aluminum or corrosion resistant stainless steel housing
Optional 4 to 20 mA feedback signal
Doubles as a junction box for direct connection of solenoid valves
Rotary and linear indication
Up to three cable entries

Housing	Aluminum or stainless steel
Enclosure	IP66, NEMA 4, 4X, 7 and 9
Hazardous Area	Flameproof ATEX II 2G Ex d IIC T4 Gb, Ex tb IIIC T113 °C Db IP66. Flameproof IECEx Ex d IIC T4 Gb. Explosion-proof CSA Cl. I Div. 1 Gr. B,C,D. Explosion-proof CSAus Cl. I Div. 1 Gr. A,B,C,D

Typical ApplicationsRotary and linear valve position indication, solenoid junction duty, and compact installations where a stainless enclosure is preferred.

Flowserve literature: brochure WCENBR0136, IOM WCENIM0136

Request DS/DM UltraSwitch Quote

Aviator and BUSwitch

Top Mount Integrated Valve Controller

An integrated valve controller rather than a switch box. The Aviator carries the same features as the UltraSwitch but adds actuator and valve control by receiving a direct solenoid voltage signal, while providing remote indication of open and closed positions through separate electrical circuits. The BUSwitch does the same over a CAN bus, available in AS-i, DeviceNet, Foundation Fieldbus and Profibus DP.

Key Features

Integrated valve controller for pneumatic rotary actuators in hazardous locations
Same feature set as the UltraSwitch, with actuator and valve control
Accepts a direct solenoid voltage signal
Remote indication of open and closed positions via separate circuits
BUSwitch adds CAN bus communication
Available in AS-i, DeviceNet, Foundation Fieldbus and Profibus DP

Housing	Aluminum on WNXV models, engineered resin on WR model
Enclosure	IP65, NEMA 4, 4X, 7 and 9
Hazardous Area	Flameproof ATEX II 2G Ex d IIB T3/T4. Flameproof IECEx Ex d IIB T3/T4 IP65. Explosion-proof cCSAus Cl. I Div. 1 Gr. C and D. Non-incendive cCSAus Class I Div. 2. Intrinsically safe FM (US/CAN)/cCSAus Cl. I,II,III Div. 1
Protocols	AS-i, DeviceNet, Foundation Fieldbus, Profibus DP

Typical ApplicationsNetworked valve populations, hazardous area installations requiring both control and feedback from one device, and plants standardizing on a fieldbus.

Flowserve literature: brochure WCENBR1057, IOM AXENIOM0100

Request Aviator / BUSwitch Quote

Switch Box Selection

Which enclosure belongs in which environment and area classification.

Series	Mounting	Housing	Enclosure	Protection Concept	Specify When
ELK39	End mount	Die cast aluminum, epoxy coated	NEMA 4, 4X, CSA	Class 1 Div 1 Gr. C, D and Div 2 Gr. E, F, G	Vertical clearance is the constraint, mounting kit elimination
WWS / WWM	Top mount	Die cast aluminum or engineered resin	IP66, IP67, NEMA 4, 4X	Intrinsically safe ATEX, cCSAus, non-incendive	General plant, globally certified, economical
WPS / WPM	Top mount	Engineered resin, 25 to 33 percent fiberglass filled	IP66, NEMA 4, 4X	Intrinsically safe ATEX and IECEx, increased safety ATEX	Harsh corrosive environments, coastal and offshore
WXCL	Top mount	Die cast aluminum	IP66, IP67, NEMA 4, 4X, 7 and 9	Flameproof ATEX and IECEx, explosion-proof cCSAus, KOSHA, INMETRO	Explosion-proof required, international certification scope
DS / DM UltraSwitch™	Top mount	Aluminum or stainless steel	IP66, NEMA 4, 4X, 7 and 9	Flameproof ATEX and IECEx, explosion-proof CSA	Compact, stainless housing, junction box duty, linear or rotary
Aviator / BUSwitch	Top mount	Aluminum or engineered resin	IP65, NEMA 4, 4X, 7 and 9	Flameproof ATEX and IECEx, explosion-proof and intrinsically safe cCSAus	Control and feedback in one device, fieldbus networks

Intrinsically safe and explosion-proof are different protection concepts, not different grades of the same thing. Intrinsically safe limits the energy in the circuit so ignition cannot occur. Explosion-proof contains an ignition within the enclosure. Your site standard will specify which, and the wiring, barriers and installation cost differ substantially between them.

Positioners And Controllers

Pneumatic and electric positioners, plus a PID controller resident in the actuator.

A positioner closes the loop between a control signal and actual valve position. Without one, an actuator moves until its own internal force balance says stop, which is not the same as the position the controller asked for, particularly against variable process forces. Worcester® offers three pneumatic positioners and three electric devices covering the full span from a simple analog card to a self-contained PID loop.

One selection factor deserves more weight than it usually gets: air consumption. A conventional pneumatic positioner bleeds instrument air continuously to maintain its null balance. Across fifty modulating valves that steady bleed is a measurable compressor load running twenty-four hours a day. The L93 Pulsair zero air bleed design and piezoelectric low power control exist specifically to remove that, and on a large modulating population the compressor energy saving is a real line item rather than a marketing claim.

Worcester APEX W7000 pneumatic top mount valve positioner

Series APEX W7000

Pneumatic Top Mount Positioner

A compact, rugged positioner providing accurate valve positioning at a competitive price, with pneumatic and electro-pneumatic input options that can be field retrofitted. Non-interactive zero and span adjustment is the calibration feature that matters most: on an interactive positioner, adjusting span moves zero and you iterate. Here you do not. The TUFRAM® severe service coating option addresses aggressive atmospheres.

Key Features

Non-interactive zero and span adjustment simplifies and shortens calibration
Interchangeable I/P modules allow field conversion between 3 to 15 psi and 4 to 20 mA input
Multiple cam options configure positioner characteristics to match valve requirements
Gold-plated spool valves in low or high flow versions to match actuator load
Low-profile flat or optional UltraDome visual indicator
Top-mounted UltraSwitch™ optional for position feedback

Housing	Die cast aluminum with electrostatic epoxy powder coating, or TUFRAM severe service coating
Enclosure	NEMA 4, 4X
Hazardous Area	FM/CSA Class I Div. 1 and 2 Gr. B,C,D. FM/CSA Class II Gr. E,F,G. ATEX II 2 G EEx d IIB + H2. ATEX II 2 G EEx d IIC. FM intrinsically safe ATEX II 2 G EEx ia IIC. FM intrinsically safe Class I Div. 1 Gr. A,B,C,D

Typical ApplicationsModulating control of rotary valves and dampers where a competitively priced, field-retrofittable positioner is required.

Flowserve® literature: brochure AXENBR0006

Request APEX W7000 Quote

Worcester APEX W8000 high performance pneumatic top mount valve positioner

Series APEX W8000

High Performance Pneumatic Positioner

The performance step above the W7000. A two-stage pneumatic relay provides faster, more sensitive response characteristics to meet demanding control objectives, which is what you need when the control loop is fighting a fast process rather than trimming a slow one. Pneumatic and electro-pneumatic input options are field retrofittable, and limit switch feedback, analog feedback and UltraDome indicators are available.

Key Features

Extremely precise control for a wide range of valve and damper applications
Two-stage pneumatic relay for faster, more sensitive response
Pneumatic and electro-pneumatic input options, field retrofittable
Limit switch feedback and analog feedback available
UltraDome visual position indicators available

Housing	Die cast aluminum with electrostatic powder coating or optional epoxy coating
Enclosure	NEMA 4, 4X, 7 and 9
Hazardous Area	FM Class I Div. 1 and 2 Gr. B,C,D and Class II Div. 1 and 2 Gr. E,F,G. FM intrinsically safe Class I Div. 1 Gr. A,B,C,D T4. FM Class I Zone 0 AEx ia IIC T4. FM non-incendive Class I Div. 2 T4. ATEX intrinsically safe II 1 G EEx ia IIC T6. ATEX II 2 GD EEx d IIB + H2 T6

Typical ApplicationsDemanding modulating control on valves and dampers, fast process loops, and applications needing hazardous area certification with integrated feedback.

Flowserve literature: brochure AXENBR0007, IOM WCENIM2078

Request APEX W8000 Quote

Series L93 Pulsair

Digital Top Mount Positioner

A loop powered microprocessor positioner controlling both linear and rotary actuators, with auto calibration and a high visibility graphic display. The zero air bleed design and piezoelectric low power control are the operating cost story: a conventional positioner bleeds instrument air continuously, and across a large modulating valve population that consumption is a compressor load you pay for every hour.

Key Features

Linear and rotary actuator control
Loop powered, microprocessor design
Simple user interface
High visibility graphic display
Auto calibration
Two-stage air delivery
Piezoelectric low power control
Zero air bleed design
Digital communication options
NAMUR output and ISO mounting

Housing	Die cast aluminum with epoxy paint, or stainless steel
Enclosure	IP66, NEMA 4X
Temperature	-22 °F to 185 °F
Hazardous Area	ATEX EExd, EEx ia, EEx nl. CSA Class 1 Div. 1 Gr. B,C,D,E,F,G and IS Class 1 Div. 1 Gr. A,B,C,D. FM Class 1 Div. 1 Gr. B,C,D and IS Class 1 Div. 1 Gr. A,B,C,D
Accessories	Position indication, fail freeze, remote mount

Typical ApplicationsHigh performance digital process control for linear and rotary actuators in modulating control service.

Flowserve literature: brochure AWCABR1019, IOM WCAIM2055

Request L93 Pulsair Quote

Series AF17

Electric Actuator Positioner

A solid-state positioner for rotary electric actuators, accepting a wide range of signal inputs from milliamp and voltage through resistive. LED calibration, deadband control, and direct or reverse acting operation cover the configuration needs of most electric modulating applications without a microprocessor in the loop.

Key Features

Solid-state circuit board
Multiple signal inputs
LED calibration
Deadband control
Direct and reverse acting
Position feedback

Housing	Die cast aluminum, epoxy paint
Supply Voltage	12, 24 VDC and 120, 240 VAC
Standard Inputs	1 to 5 mA, 4 to 20 mA, 10 to 50 mA, 0 to 135 ohm, 0 to 1,000 ohm, 0 to 5 VDC, 0 to 10 VDC
Temperature	-40 °F to 150 °F
Accessories	Analog output module

Typical ApplicationsPosition control for rotary electric actuators controlling valves and dampers.

Flowserve literature: brochure WCABR1000, IOM WCAIM2031 and WCAIM2050

Request Series AF17 Quote

Series DFP17 DataFlo

Microprocessor Electric Positioner

The microprocessor step above the AF17. Pushbutton calibration, speed control, electronic travel stops, adjustable dead band, and twenty programmable functions. Electronic travel stops are worth attention: they remove the mechanical stop adjustment from the commissioning sequence, and they can be changed later without opening the actuator.

Key Features

Microprocessor control
Pushbutton calibration
Speed control
Electronic travel stops
Adjustable dead band
Multiple I/O options
Digital network communications
Twenty programmable functions

Housing	Die cast aluminum, epoxy paint
Supply Voltage	12, 24 VDC and 120, 240 VAC
Standard Inputs	1 to 5 mA, 4 to 20 mA, 10 to 50 mA, 0 to 135 ohm, 0 to 1,000 ohm, 0 to 5 VDC, 0 to 10 VDC
Temperature	-40 °F to 150 °F
Accessories	Analog output module

Typical ApplicationsHigh performance modulating control of quarter-turn and multi-turn rotary electric actuators on valves and dampers.

Flowserve literature: brochure WCENBR1021, IOM WCAIM2037

Request Series DFP17 Quote

Series DFC17 DataFlo

Electric Actuator Controller

Not a positioner but a controller. The DFC17 provides direct process control with a PID loop and autotuning resident in the actuator itself, accepting a 4 to 20 mA, RTD or thermocouple process input and driving the valve to a setpoint without a separate loop controller. On a skid or a standalone system, that removes an entire panel from the scope.

Key Features

Microprocessor PID control
Autotuning
Local process control
Pushbutton calibration
Performance monitoring
Multiple I/O options
Modbus network communications
RS485 network communications
Desktop software

Housing	Die cast aluminum, epoxy paint
Supply Voltage	24 VDC and 120, 240 VAC
Standard Inputs	4 to 20 mA, RTD, thermocouple
Temperature	-40 °F to 150 °F
Accessories	Analog output, 24 VDC power supply

Typical ApplicationsDirect process control for flow, temperature, pressure, level and pH. Food and beverage, OEM, industrial and automotive.

Flowserve literature: brochure WCENBR1021, IOM WCENIM2026

Request Series DFC17 Quote

Application Cross-Reference

Match your service to the right Worcester® valve and actuation combination.

Application	Valve	Actuation	Why
General Process Isolation, Screwed Or Welded	Series 44	Series F39 or ACCESS	Three-piece serviceability with rack and pinion automation
Continuous Flow, Pressure Drop Matters	Series 59	Series F39	Full port bore minimizes pumping cost over the line's life
Flanged Plant Standard, High Cycle	Series 51 / 52	Series F39 with WWS/WWM	Pre-drilled actuation mounting and live loaded stem seal
Pipeline And Sour Service	Series F819 / F829	Series F39 with WXCL	API 6D, API 607 and NACE MR01-75 in one valve
Fire Scenario In The Hazard Analysis	AF, FZ or FM firesafe series	Series 34 or F39 spring return	API 607, EXES 3-14-1-2A and FM 7440 with fail-safe stroke
LDAR Program Or Category M Fluid	Series 94	Series F39 with ACCESS	Double live loaded stem seal, no permitted stem leakage
Chlorine Handling	Series CL94, CL44 or CL51/52	Series 34 spring return	Chlorine Institute Pamphlet 6 with ball vented to high pressure side
LNG And Industrial Gases	Series C4, C44 or C51	Series F39 with bonnet extension clearance	Rated to -425 °F with V3 cavity relief
Pharmaceutical And Biotech	Series WK70	Series 36 or F39	ASME BPE, FDA 21CFR, Class 100 clean room assembly
Larger Sanitary Process Lines	Series WK74	Series F39	Cast 316L tube bore with 20Ra finish
Vessel And Reactor Drain	Series TB59	Series 34 or F39	Flush tank bottom eliminates the dead leg
Hydraulics And CNG Above ASME 600	Series 4, H44 or PT	Series F39	Resilient seat to 5,000 psi
Subsea And Highest Pressure Classes	Series H71	Consult E4 Industrial	ASME Class 1500 and 2500
Modulating Control On Fibrous Media	Series CPT	Series F39 with APEX W8000 or L93 Pulsair	Characterized seat with efficient shearing action
Diverting, Blending Or Sampling	D44 / D4, D51 or 18 / 19	Series F39 180 degree configuration	Multi-port diverter, up to five ports
Weight-Constrained Elevated Pipework	Series 151 / 301	Series 34	40 to 60 percent lighter than a conventional ball valve
OEM Skid With Timed Cycling	Series 44 or 45 / 59	Series 36 with solid-state timer	Unattended cycling without a separate controller
Fail-Safe ESD, Power But No Instrument Air	Any flanged or three-piece series	Series F72 electro-hydraulic	Fail-safe on power failure with no clutches or battery packs
Standalone Process Loop, No Panel	Series CPT or 51 / 52	Series 75 with DFC17 DataFlo	PID control and autotuning resident in the actuator
Explosion-Proof Area, International Project	Series per process	Series F39 with WXCL	ATEX, IECEx, cCSAus, KOSHA and INMETRO from one family
Coastal Or Offshore, Corrosive Atmosphere	Stainless body per process	Series F39 with WPS / WPM	Fiberglass-filled engineered resin removes the corrosion path
Large Valve Population, Lowest Installed Cost	Series 51 / 52	ACCESS	Integral solenoid and switch, no brackets, single connection

Specifying A Worcester® Package

What we need from you, and where valve and actuation specifications most often go wrong.

Information Required

Line size and pressure class. Nominal diameter and ASME class, plus the actual operating pressure and temperature rather than only the class rating.
Media. Composition, phase, and whether it is abrasive, fibrous, polymerising, crystallising or toxic. This drives seat material, cavity fill, and body material more than anything else.
Operating and design temperature. Both process and ambient, at both extremes.
End connection. Screwed, socket weld, butt weld, flanged, hygienic clamp, or wafer.
Port requirement. Full port or regular port, and whether the line will be pigged.
Body and trim material. Or the corrosion data to let us work it.
Duty. On/off isolation, emergency shutdown, or continuous modulating, with expected cycles per day.
Failure mode. Fail open, fail closed, or fail in last position, confirmed against the process hazard analysis.
Available utility at the valve. Instrument air pressure including the minimum, or electrical supply and phase.
Area classification. Class and division or zone, gas group, temperature class, and whether the site standard is intrinsically safe or explosion-proof.
Control interface. Discrete signal, 4 to 20 mA, or a fieldbus protocol.
Special service requirements. Firesafe, fugitive emission, NACE, sanitary, oxygen clean, cryogenic, or Chlorine Institute.

Common Specification Errors

Confusing pressure class with allowable working pressure. An ASME 300 valve is not rated to 300 psi, and it is not rated to its cold working pressure at temperature either. The pressure and temperature curve for the specific body material and seat combination governs. Soft seats derate sharply with temperature.
Sizing the actuator at nominal air pressure. Size at the minimum expected supply pressure at the valve. An actuator sized at 80 psig that sees 55 psig at the end of a long header on a cold morning is undersized in service.
Missing the spring stroke check. On a spring return actuator the calculation runs twice: air stroke against valve demand at minimum supply, and spring stroke against seating torque with margin. A unit that opens comfortably but fails to seat is a silent failure.
Ignoring seat torque growth. Published valve torque is a clean, new-valve number. A valve sitting closed for months in scaling, coking or polymerising service does not present that number.
Specifying firesafe or fugitive emission after the fact. Both are construction variants, not add-ons. Getting them into the original requisition costs a fraction of replacing the valve.
Overlooking cavity relief on cryogenic and liquefied gas service. Trapped liquid warming in a closed ball cavity generates pressure capable of damaging the valve. This is a design feature, not an accessory.
Mixing protection concepts. Intrinsically safe and explosion-proof require different wiring, barriers and installation practice. Confirm the site standard before selecting the switch box, not after.
Forgetting bonnet extension clearance. Cryogenic valves with bonnet extensions need vertical space above the valve, and the actuator sits above that. Check the envelope at the design stage.

Mounting Standards

ISO 5211 defines the mounting flange between a quarter-turn valve and its actuator, standardizing bolt circle, pilot diameter and drive coupling. The Worcester F519/F529 and F819/F829 carry ISO 5211 mounting as standard, and the Series 51/52 provides pre-drilled mounting holes for actuation.

NAMUR VDI/VDE 3845 standardizes the accessory interface on the actuator. Across the Worcester switch box range, NAMUR compliance eliminates the coupler and maximizes interchangeability, and on the F39 actuator the end cap air supply ports and end mount accessories remove the tubing runs between solenoid and actuator. See also our solenoid valve reference, our quarter-turn valve reference and our valve materials and trims guide.

Standards, Certifications & Compliance

The specification language that appears on Worcester® requisitions, and what it means.

ASME B16.34. The governing standard for valve pressure and temperature ratings, wall thickness and materials. Applies across essentially the entire Worcester valve range. Note that the class rating and the allowable working pressure at your operating temperature are different numbers, and the pressure and temperature chart governs.

API 6D. The pipeline valve specification, carried by the Series F819 / F829. This is the standard that qualifies a valve for pipeline and midstream service.

API 607 fire test. Carried across the firesafe range and the F519/F529, F819/F829, Series 94, cryogenic and directional series. API 607 is a type test demonstrating that the valve maintains a defined seat and external leakage limit during and after a fire exposure.

NACE MR01-75. Materials requirements for sulfide stress cracking resistance in sour service, carried by the Series F819 / F829.

EXES 3-14-1-2A and FM 7440. Additional firesafe approvals on the AF, FZ and FM series beyond API 607.

ASME B31.3 Category M. The piping code designation for fluids so toxic that a single exposure to a very small quantity can cause serious irreversible harm. The Series 94 is suitable for Category M service.

Chlorine Institute Pamphlet 6, MSS-SP-72, B31.1 and B31.3. The CL series is built to Chlorine Institute recommendations including special testing, cleaning and packaging.

ASME BPE, FDA 21CFR, USP VI and USDA. The high purity standards package on the WK70 and WK74, covering surface finish, material, and cleanability for pharmaceutical, biotech and food processing.

ASME B2.1 and ASME B16.11. Screwed end and socket weld end connection standards respectively, applied across the three-piece range.

ISO 5211 and NAMUR VDI/VDE 3845. Valve-to-actuator and actuator-to-accessory mounting standards. See the ISO 5211 and NAMUR reference pages.

Hazardous area certification. Across the actuation and controls range: ATEX, IECEx, FM, CSA, cCSAus, cFMus, UL, NRTL/C, KOSHA and INMETRO, in intrinsically safe, non-incendive, increased safety, flameproof and explosion-proof protection concepts. Confirm which concept your site standard requires before selecting. Further detail is on the valve standards reference page.

Industries We Support

Where the Worcester® range lands, and what drives selection in each.

Chemical And Petrochemical

The broadest use of the range. Aggressive media drive body and trim material, LDAR programs drive the Series 94 fugitive emission valves, fire hazard analysis drives the AF and FZ firesafe series, and Category M fluids drive the double live loaded stem seal. Material breadth across carbon steel, stainless, Monel, Alloy 20 and Hastelloy-C is what lets one valve family cover a whole unit.

Refining And Hydrocarbon Processing

Firesafe construction to API 607 and FM 7440, API 6D on pipeline-adjacent service, and NACE MR01-75 where sour service applies. High cycle capability and live loaded stem seals matter because turnaround intervals are long and a valve that needs repacking between turnarounds is a problem with no good solution.

Pipeline And Midstream

The Series F819 / F829 with API 6D, API 607 and NACE. Explosion-proof switch boxes and spring return pneumatic actuation for shutdown service. For pipeline actuation specifically, see our pneumatic actuation and hydraulic actuator references.

Pharmaceutical, Biotech And Life Sciences

WK70 forged and WK74 cast high purity valves, TB59 tank bottom drains, Class 100 clean room assembly, controlled ferrite and sulfur, 20Ra or 15Ra electropolished finish, and CMTRs for the validation package. This is a market where the paperwork is as much of the product as the valve.

Food, Beverage And Cosmetics

High purity and tank bottom valves, sanitary end connections, and FDA 21CFR and USDA compliance. The Series 151 and 301 wafer valves also appear here in steam service on vegetable peelers, steam ejectors and distilleries.

Industrial Gases And Cryogenics

The C4, C44 and C51 cryogenic series to -425 degrees F with V3 cavity relief and bonnet extensions, in air separation, LNG, and liquid nitrogen, oxygen and argon storage and transfer.

Chlor-Alkali And Water Treatment

The CL series for liquid and gaseous chlorine built to Chlorine Institute Pamphlet 6, plus general process isolation across water and wastewater treatment. See our gate, globe and check valve reference for the linear valve side of these plants.

Power Generation

Boiler feed water, condensate, and temperature control on steam and thermal fluid. The Series 75 electric actuator with PID control and the Series 151 and 301 wafer valves in steam service both appear regularly here.

Pulp And Paper

The CPT characterized seat control valve is built for exactly this: fibrous stock that would foul a globe valve trim, controlled through an efficient shearing action with high rangeability and zero external leakage.

OEM, Packaging And Skid Builders

The Series 45 / 59 large diameter three-piece for packaging systems, the Series 36 with solid-state timer for unattended cycling, and ACCESS for the lowest installed cost on repeatable packages with no bracket engineering.

Why Source Worcester® From E4 Industrial

We are an engineering-led flow systems company, not a catalog reseller. On an automated valve package the difference is in the interfaces.

Complete Package From One Source

Valve, actuator, mounting, solenoid, switch box and positioner specified together and supplied on one purchase order. The interfaces between those items are where projects lose time and money, and we own all of them.

Engineering-Led Selection

Selections worked from media, temperature, pressure and duty, with actuator sizing run against your minimum available air pressure and both the air stroke and the spring stroke checked. You get the calculation basis with the quote.

Special Service Experience

Firesafe, fugitive emission, cryogenic, chlorine, sanitary and NACE are construction variants that have to be right at requisition. We will tell you which ones your service actually requires.

Material Selection Guidance

Carbon steel, stainless, brass, Monel, Alloy 20 and Hastelloy-C bodies with soft and metal seat options. We work the material against your corrosion data rather than defaulting to 316 and hoping.

Houston Gulf Coast Base

Located in Houston, Texas, at the center of North American refining, petrochemical and midstream infrastructure. Local support across Texas and the Gulf Coast, nationwide shipping.

Direct Engineer Accountability

You talk to the engineer who did the selection. One point of contact from specification through commissioning, not a rotating account rep and not a call center.

Hazardous Area Competence

Intrinsically safe and explosion-proof are different protection concepts with different wiring and installation consequences. We confirm your site standard before selecting, not after the switch boxes arrive.

Documentation That Survives Audit

Pressure and temperature curves, material certificates and CMTRs where required, torque calculation basis, certifications, IOM manuals and test records supplied with the package.

Worcester® Frequently Asked Questions

The questions we field most often on Worcester valve and actuation selection.

What is Worcester Controls and who makes it?

Worcester Controls is Flowserve®'s quarter-turn ball valve and valve automation brand. The catalog covers three-piece, flanged, wafer and directional ball valves, special service variants including firesafe, cryogenic, chlorine, fugitive emission and high purity, plus electric and pneumatic actuators, switch boxes and positioners. Flowserve rotary valves are positioned around easy maintenance and automation backed by quality heritage brands.

What is the difference between a three-piece and a flanged ball valve?

A three-piece valve separates into a centre body and two end pieces, so it acts as both a valve and a union. The centre section carrying the ball and seats can be removed for service without disturbing the pipework or breaking the end connections. A flanged valve bolts to mating pipe flanges and is removed as a complete unit. Three-piece suits valves that will be rebuilt in place, particularly on welded lines. Flanged suits plant standards calling for flanged connections and sizes above the three-piece range.

Should I specify full port or regular port?

Regular port is smaller, lighter, cheaper and needs less actuator torque, and it is correct for most isolation service where the valve is either fully open or fully closed. Full port earns its cost in three cases: continuously flowing lines where accumulated pressure drop becomes a real pumping cost, viscous or fibrous or slurried media where a bore step change causes deposition, and any line that must be pigged or cleaned in place.

What is a live loaded stem seal and why does it matter?

Packing relaxes and consolidates over thousands of cycles and thermal excursions. On a conventional gland the packing load decays until the stem becomes a leak path. A live loaded design uses spring elements to maintain packing compression as the packing consolidates. That is what converts a valve from a scheduled repacking item into one that holds its stem seal for its service life. The Series 94 uses a double live loaded design for fugitive emission service.

What is a cavity filled ball valve?

A standard ball valve traps media in the body cavity behind the ball when closed. Cavity filled designs eliminate that void. It matters in three situations: sanitary service where trapped product will not drain, chemical service where trapped media polymerises or solidifies, and cryogenic or liquefied gas service where trapped liquid vaporises as it warms and generates damaging pressure. The cryogenic series uses a V3 vent hole for cavity relief and the chlorine series vents the ball to the high pressure side.

Which Worcester valves are firesafe?

The AF44, FZ44, AF51/52, FZ51/52, FM51/52, AF94, FZ94, F519/529 and F819/829 series. They are certified to API 607 fire test, EXES 3-14-1-2A and FM 7440, ensuring operational integrity before, during and after a fire, with tight shut off, anti-static construction and no external leakage. Because firesafe versions exist across the standard body styles, the firesafe variant of a valve you already use keeps the same face-to-face dimensions and mounting.

What is Category M service and which valve covers it?

Category M is the ASME B31.3 designation for fluids so toxic that a single exposure to a very small quantity can cause serious irreversible harm. The Series 94 fugitive emission valve is suitable for Category M services, using a double live loaded stem seal design with outstanding performance on high-cycle applications where no stem leakage is allowed.

How cold can Worcester cryogenic valves go?

The C4, C44 and C51 cryogenic series are rated to -425 degrees F. They use positive ball and cavity relief through a V3 vent hole, zero leak packing, and effective bonnet extensions that keep the packing above the cold zone. They are designed for low thermal stress, automation and fire safety, and assembled in a Class 1000 clean room.

What is special about the chlorine service valves?

The CL94, CL44 and CL51/52 are constructed in accordance with Chlorine Institute recommendations including special testing, cleaning and packaging, and comply with Chlorine Institute Pamphlet 6 alongside MSS-SP-72, B31.1 and B31.3. A relief vent in the ball vents to the high pressure side, and construction is carbon steel with Monel trim. They are assembled in a Class 1000 clean room and handle both liquid and gaseous chlorine.

What is the highest pressure Worcester valve?

The Series H71 Hydromizer, at ASME Class 1500 for 1 in to 2 in and ASME Class 2500 for 1/2 in and 3/4 in, with subsea among its applications. Below that, the Series 4, H44 and PT cover pressures above ASME 600 up to 5,000 psi with resilient seats, which is an unusual combination since that pressure normally requires metal seating.

What surface finish do the high purity valves have?

20Ra interior surface finish as standard, with 15Ra electropolished available. The WK70 is forged F316L with ferrite controlled below 1 percent, and the WK74 is cast A351-CF3M with ferrite below 5 percent. Both control sulfur for orbital welding, are assembled in a Class 100 clean room, and comply with ASME BPE, FDA 21CFR, USP VI and USDA. CMTRs are provided.

Which Worcester actuator is fail-safe on power loss?

The Series F72 electro-hydraulic actuator. It is fail-safe on power failure with a fast closure stroke, and notably it has no hydraulic reservoir so it mounts in any position, and no clutches, battery packs or clock springs. It is FM approved to Class 1 Div 1 Groups B, C and D under FM 7411, with torque up to 900 in-lbs at end of spring. Spring return versions of the pneumatic Series 34 and F39 also provide a fail-safe stroke.

What is the difference between the Series F39 and ACCESS actuators?

Both are rack and pinion reaching 60,000 in-lbs at 120 psi. The F39 is a conventional actuator to which you add a separate solenoid and switch box, which gives flexibility in accessory selection and lets you stock those parts across brands. ACCESS integrates the solenoid and position switch into the actuator with a single electrical connection, no mounting brackets, and a diagnostic LED board. On a large population with a standardized accessory list, ACCESS usually wins on total installed cost.

What does NAMUR VDI/VDE 3845 compliance give me on a switch box?

It eliminates the coupler between the actuator shaft and the switch cams, and maximizes interchangeability between devices. A coupler is an alignment tolerance and a wear part, and it is the most common reason a switch box drifts out of calibration after a few thousand cycles. Removing it removes the failure mode. All the Worcester top mount boxes comply.

What is the difference between intrinsically safe and explosion-proof?

They are different protection concepts, not different grades of the same thing. Intrinsically safe limits the energy in the circuit so that ignition cannot occur, and requires barriers and specific wiring practice. Explosion-proof contains an ignition inside a robust enclosure, and requires conduit sealing practice. Your site standard specifies which, and installation cost differs substantially. Worcester offers both across the switch box range, with WXCL for explosion-proof and WPS/WPM and WWS/WWM for intrinsically safe.

Which switch box should I use in a corrosive or coastal environment?

The WPS / WPM, which uses an engineered resin enclosure at 25 to 33 percent fiberglass fill rather than die cast aluminum. Resin removes the corrosion path entirely rather than coating over it. The DS / DM UltraSwitch™ in corrosion resistant stainless steel is the alternative where a metal enclosure is preferred or required.

What is a valve positioner and do I need one?

A positioner closes the loop between the control signal and actual valve position. Without one, an actuator moves until its own internal force balance says stop, which is not necessarily the position the controller asked for, particularly against variable process forces. If the valve is modulating rather than on/off, you need one. If it is on/off isolation, you do not.

Why does positioner air consumption matter?

A conventional pneumatic positioner bleeds instrument air continuously to maintain its null balance. Across a large modulating valve population that steady bleed is a measurable compressor load running continuously. The L93 Pulsair uses a zero air bleed design with piezoelectric low power control specifically to remove it, and on a large population the compressor energy saving is a real operating line item.

What is the DFC17 DataFlo and how is it different from a positioner?

The DFC17 is a controller rather than a positioner. It provides microprocessor PID control with autotuning resident in the actuator itself, accepting a 4 to 20 mA, RTD or thermocouple process input and driving the valve to setpoint without a separate loop controller. On a skid or standalone system that removes an entire control panel from the project scope. It supports Modbus and RS485 network communications with desktop software.

Does the pressure class tell me the working pressure?

No, and this is the most common specification error we see. An ASME 300 valve is not rated to 300 psi, and it is not rated to its cold working pressure at elevated temperature either. The pressure and temperature curve for the specific body material and seat combination governs, and soft seats derate sharply with temperature. Always work from the curve, not the class.

Can Worcester actuators be fitted to valves from other manufacturers?

In most cases yes. Where the valve carries an ISO 5211 flange the interface is straightforward, and the F39 provides NAMUR and ISO mounting. Where it does not, a mounting bracket and coupling can be engineered from the valve topworks dimensions. Send us the valve tag data, the topworks drawing if you have it, and photographs of the existing mounting.

What lead times should I expect?

Standard carbon steel and stainless configurations in common sizes move fastest. Special service variants, exotic materials such as Monel, Alloy 20 and Hastelloy-C, high purity valves requiring clean room assembly and CMTRs, and the highest pressure classes are built to order and carry longer schedules. Call us with your requirement and we will give you a current, honest schedule rather than an optimistic one.

Valve Automation Engineering References

Technical reference pages covering valve types, materials, actuation technologies and mounting standards.

Quarter Turn Valves Gate Globe Check Valve Materials & Trims Valve Standards Valve Actuation Pneumatic Actuation Electrical Actuation Hydraulic Actuators Electro-Hydraulic Actuators ISO 5211 NAMUR Solenoid

Ready To Specify Your Valve Package?

Send us line size and class, media and temperature, end connection, port requirement, duty and failure mode, plus the available instrument air or electrical supply at the valve. We will return a complete Worcester® selection covering valve, actuator, mounting, controls and position indication, with the calculation basis, pricing and lead time.

281.664.8000 Email sales@e4industrial.com Request A Quote Download Catalog

E4 Industrial is an independent supplier and is not a Flowserve authorized distributor. Flowserve is a registered trademark of Flowserve Corporation. Worcester, UltraSwitch, UltraDome, Quick-Set, DataFlo, APEX, Pulsair, Aviator, BUSwitch, Hydromizer, Mizer and TUFRAM are trademarks of Flowserve Corporation. All other marks are the property of their respective owners. All product specifications shown reflect published Worcester® Controls product literature and are subject to change by the manufacturer without notice. Responsibility for proper selection, use, and maintenance of any product remains with the purchaser and end user.

E4Industrial LLC is a Houston, Texas based engineering-led flow systems company. 281.664.8000 | sales@e4industrial.com

Your cart is empty

Your cart

Subtotal

$0.00

Worcester® Control Valves, Actuators & Controls | Flowserve® Valve Automation

Worcester® Control ValvesActuation & Controls

Worcester Controls Product Catalog

How To Select A Worcester® Body Style

Three-Piece Versus Flanged Versus Wafer

Full Port Versus Regular Port

Live Loaded Stem Seals

Cavity Filled And Vented Ball Designs

Three-Piece Ball Valves

Series 44

Series 59

Series 45 / 59

Flanged Ball Valves

Series 51 / 52

Series F519 / F529

Series F819 / F829

Wafer Pattern And Directional Valves

Series 151 and 301

Series D44 / D4, D51, 18 / 19

Special Service Valves

Series 94, 94-150, 94-300, 94-600

Series CL94, CL44, CL51 / 52

Series AF, FZ and FM

Series C4, C44 and C51

High Purity And Tank Bottom Valves

Series WK70

Series WK74

Series TB59

High Pressure And Control Valves

Series 4, H44 and PT

Series H71

Series CPT

Worcester® Valve Selection Table

Worcester® Electric Actuators

Series 36

Series 75

Series F72

Worcester® Pneumatic Actuators

Series 34

Series F39

ACCESS

Actuator Comparison

Switch Boxes And Valve Controllers

Series ELK39

Series WWS / WWM

Series WPS / WPM

Series WXCL

Series DS / DM UltraSwitch™

Aviator and BUSwitch

Switch Box Selection

Positioners And Controllers

Series APEX W7000

Series APEX W8000

Series L93 Pulsair

Series AF17

Series DFP17 DataFlo

Series DFC17 DataFlo

Application Cross-Reference

Specifying A Worcester® Package

Information Required

Common Specification Errors

Mounting Standards

Standards, Certifications & Compliance

Industries We Support

Chemical And Petrochemical

Refining And Hydrocarbon Processing

Pipeline And Midstream

Pharmaceutical, Biotech And Life Sciences

Food, Beverage And Cosmetics

Industrial Gases And Cryogenics

Chlor-Alkali And Water Treatment

Power Generation

Pulp And Paper

OEM, Packaging And Skid Builders

Why Source Worcester® From E4 Industrial

Complete Package From One Source

Worcester® Control Valves
Actuation & Controls