Walworth Valves

Walworth since 1842 is supplying valves to the petrochemical, oil & gas, petroleum, power generation, pulp and paper, cryogenic and geothermal industries, among others. Over the years, the Company has produced more than 40,000 different types of products and serves as a global supplier to varied markets utilizing the expertise of over 500 trained employees.

WALWORTH products are manufactured following strictly the most recognized international standards all over the world, such as API, ANSI, ASME, ASTM, MSS, NACE, AWWA, BSI, CSA, among others.

Walworth_Corporate_Profile_2011-2

We are one of the leading companies in industrial valve manufacture for fluid control made in a wide variety of materials such as carbon and alloyed steels, austenitic and duplex stainless steels, nickel alloys, ductile iron, and bronze, just to mention a few, which are available as Gate, Globe, Check, Ball, Pressure Seal, AWWA Butterfly and Plug Valves, in the various alloy materials necessary to meet the required specifications for the valve industry.

Walworth FORGED STEEL CATALOG

WALWORTH® offers this product line manufactured in accordance with ANSI Classes 800, 1500 and 2500 and sizes from 1/4″ to 2″ for socket weld, threaded and combined ends. Available also Integral Flanges in 150, 300, 600 and 1500 either Raised Face or ring type joint ends.

Forged Steel Gate Valves

Design Features
  • Valves in accordance with API-602.
  • Socket Weld, Threaded, Combined or Flanged RF or RTJ ends.
  • Bolted Bonnet or Welded Bonnet options.
  • Renewable or integral seats.
  • Low fugitive emissions control.
  • NACE Service either MR-0175 or MR-0103.
  • Test in accordance with API-598
TYPE SIZE PRESSURE CLASS AS PERASME/ANSI B16.34 FOR SW OR NPT ENDS PRESSURE CLASS AS PER ASME/ANSI B16.34FOR RF OR RTJ ENDS
Gate 1/4” to 2” 800, 1500 & 2500# 150, 300, 600, 1500 & 2500 #
Globe 1/4” to 2” 800, 1500 & 2500# 150, 300, 600, 1500 & 2500 #
Piston Check 1/4” to 2” 800, 1500 & 2500# 150, 300, 600, 1500 & 2500 #
Ball Check 1/4” to 2” 800, 1500 & 2500# 150, 300, 600, 1500 & 2500 #
Swing Check 1/4” to 2” 800, 1500 & 2500# 150, 300, 600, 1500 & 2500 #

Forged Steel Globe Valves

The Globe Valves are primarily used to modulate or regulate the volume of the flow.  This type of valve should always be installed so the flow intake enters through the base of the valve seat. The valve has an arrow stamped on the body to indicate the preferred direction on flow.

Design Features
  • Valves in accordance with API-602.
  • Socket Weld, Threaded, Combined or Flanged RF or RTJ ends.
  • Bolted Bonnet or Wel ded Bonnet options.
  • Standard or Full Port.
  • Low fugitive emissions control.
  • NACE Service either MR-0175 or MR-0103.
  • Test in accordance with API-598
Product Range
TYPE SIZE PRESSURE CLASS AS PERASME/ANSI B16.34 FOR SW OR NPT ENDS PRESSURE CLASS AS PER ASME/ANSI B16.34FOR RF OR RTJ ENDS
Gate 1/4” to 2” 800, 1500 & 2500# 150, 300, 600, 1500 & 2500 #
Globe 1/4” to 2” 800, 1500 & 2500# 150, 300, 600, 1500 & 2500 #
Piston Check 1/4” to 2” 800, 1500 & 2500# 150, 300, 600, 1500 & 2500 #
Ball Check 1/4” to 2” 800, 1500 & 2500# 150, 300, 600, 1500 & 2500 #
Swing Check 1/4” to 2” 800, 1500 & 2500# 150, 300, 600, 1500 & 2500 #

Forged Steel Swing Check Valves:  Check valves are generally used to protect pumps or similar equipment, allowing the flow only in one direction and preventing flow reversal due to back pressure.

Design Features
  • Valves in accordance with API-602
  • Socket weld, threaded, combined.
  • Bolted or welded bonnets options.
  • Low fugitive emissions control.
  • Nace service either MR-0175 or MR-0103
  • Test in accordance with API-598.

Forged Products Include:  Forged Steel “Y” Globe Valves, Forged Steel Swing Check Valves, Forged Steel Piston Check Valves, Forged Steel “Y” Piston Check Valves, Forged Steel Ball Check, Forged Steel “Y” Ball Check

 Cast Steel Globe Valves

The Globe Valves are primarly used to modulate or regulate the volume of the flow.  A Globe Valve is not recommended when a continuous full flow of fluid is required due to the high pressure drop inherent to the design of a Globe Valve.  This type of valve should always be installed so the flow intake enters through the base of the valve seat. The valve has an arrow stamped on the body to indicate the preferred direction on flow.

Design Features
  • Globe valves design in accordance with ASME B16.34
  • Globe valves option in accordance with API-603 only for stainless steel & nickel alloys.
  • Gate & globe valves for cryogenic service with gas column in accordance with BS-6364 upon request
  • Flange dimensions in accordance with ASME B16.5 for valves up to 24″ nominal diameter
  • Handwheel, handwheel impact, chain wheel, gear operation, electric, pneumatic or hyydraulic actuation as per customer requirements
  • By-pass, lantern rings, grease injectors, special connections, etc.
  • Low fugitive emissions control
  • NACE service either MR-01-75 or MR-01-03.
  • Test in accordance with API-598
  • Stop check design option available

Walworth CAST STEEL valves

The Gate Valve is used when the need exist for a device that allows an interruption or cut off the flow of a fluid.

Is not recommendable to use Gate Valves for flow modulation as the high velocity of the through may result in erosive damage to the wedge and seats when the valve is partially opened. Under normal operating conditions, the valve should remain either fully open or fully closed. Installation of a Gate Valve is independent of the flow direction.

Design Features
  • Gate valves designed in accordance with API-600,  solid or parallel slide wedge/disc.
  • Gate valves option in accordance with API-603 only for stainless steel & nickel alloys.
  • Standard manufacturing wedge from 2” to 4” solid wedge design; 5” and up flexible wedge.
  • Gate and Globe valves for Cryogenic service with gas column in accordance with BS-6364 upon request.
  • Flange dimensions in accordance with ASME B16.5 for valves up to 24” nominal diameter.
  • Hand-wheel, impact Hand-wheel, Chain-wheel, Gear operation, Electric, Pneumatic or Hydraulic Actuation as per Customer requirements.
  • By-Pass, Lantern rings, grease injectors, special connections, etc. Low fugitive emissions control.

Cast Steel Check Valves

Check valves are generally used to protect pumps or similar equipment, allowing the flow only in one direction and preventing flow reversal due to back pressure.The swing type check valves are designed to produce a low pressure drop in the pipeline. This design provides a tighht seal as well as a fast reaction to the closure.

Design Features
  • Swing check valves option in accordance with API-603 only for stainless steel & Nickel alloys.
  • Swing check valves for cryogenic service in accordance with BS-6364.
  • Flange dimensions in accordance with ASME B16.5 for valves up to 24” nominal diameter.
  • Damper & Counter weight options.
  • Drain connections as per Customer request.
  • Low fugitive emissions control.
  • NACE service either MR-01-75 or MR-01-03.

 Walworth Ball Valves

Trunnion Mounted Ball      
 
Trunnion Mounted Ball valves  Walworth-Trunnion_Ball_Valves_Catalog are used primarily, but not limited to, the Oil & Gas Industry. Trunnion Mounted Ball valves are offered in Pressure Classes 150, 300, 600, 900, 1500 & 2500# and sizes from 2” up to 60” nominal diameter. WALWORTH® Trunnion Mounted Ball valves meet API-6D full bore specifications for piggable service  avoiding turbulence and fluid pressure drop through the valve. WALWORTH® offers an array of materials used for this product line, including but not limited to:a) Carbon Steels like A105 or WCB.b) Low Carbon Steels like LF2, LF3 or LCB, LCC, etc.c) Stainless Steels like F316, F347 or CF8M, CF8C, etc.d) Duplex Stainless Steel like F51 or CD3MN.e) Super Duplex Stainless Steel like F55 or CD3MWCuN.

WALWORTH® offers a variety of trim materials including but not limited to the full API-6D published trim list. Additional trims are available such as high strength steels like 17-4pH, duplex and super duplex steels (UNS S31803 or UNS S32750), high nickel alloys (Monel, Inconel, Incoloy, Hastelloy, etc), among others.

Design Features

  • Trunnion Mounted Ball Valves in accordance with API-6D.
  • Bolted Body or Welded Body.
  • Metal to Metal Tungsten Carbide and stellite 6 coatings option available.
  • Carbon steel body, Inconel 625 internal cladding available.
  • Meets Fire Test in accordance API-6FA, API-607.
  • Full bore or reduced bore available.
  • Flange dimensions in accordance ASME B16.5 for valves up to 24”nominal diameter.
  • Flange dimensions in accordance MSS-SP-44, ASME/ANSI B16.47
  • Series A or B for valves over 26” nominal diameter.
  • Wrench, Gear or Electric Operated options.
  • Double Block and Bleed.
  • Bi-directional flow.
  • Anti-static device.
  • Blow out proof system.
  • NACE Service either MR-01-75 or MR-01-03.
  • Test in accordance API-6D.

 

Product Range

 

TYPE SIZE PRESSURE CLASS AS PER ASME/ANSI B16.34 ENDS
Trunnion Ball Valve Bolted Body 2” to 60” 150, 300, 600, 900, 1500  & 2500# RF, RTJ or BW
Trunnion Ball Valve Welded 2” to 60” 150, 300, 600, 900, 1500  & 2500# RF, RTJ or BW
 Floating Ball      
 
This product line is used primarily in the Oil & Gas, Building and construction Industries, Chemical and Petrochemical services, among others. WALWORTH® offers Floating Ball valves to provide positive shut-off while minimizing pressure drop.WALWORTH® offers an array of materials used for this product line, including but not limited to: a) Carbon Steel such as A-105 or WCB, etc.b) Stainless Steel such as CF8, CF8M, etc.c) Low Carbon Stainless Steel such as CF3, CF3M, CG3M, etc.d) Super Stainless Steel such as CN7M (Alloy 20), CN3M (Alloy 20 modified), CT15C, etc.e) Brass like B283 grade C37700.
STEEL PLUG VALVES
Steel Plug valves are used primarily, but not limited to, the Gas & Petroleum Pipeline, Pulp & Paper, Refineries, Chemical / Buildings, Water & Sewerage Industries.  Steel Plug valves are used to prevent internal leakage. This product line is offered in Pressure Classes 150, 300, 600, 900, 1500 & 2500 # and sizes from 2” up to 36” nominal diameter.

  • Bottom Entry Compensator Plug valves in three patterns: Short, Regular and Venturi from 1/2” (8 mm) to 36” (900 mm) and pressure class in accordance ASME B16.34, 150 (PN 20), 300 (PN 50), 600 (PN 110), 900 (PN 150), 1500 (PN 260) & 2500 (PN 420).
  • Top Entry Steel Lubricated Plug Valve API Classes 2000#, 3000#, & 5000# and sizes from 2 1/2” to 4 1/16” nominal diameter.
  • Top Entry Steel Plug Valves in three patterns: short, regular and venturi and sizes from 2” (8 mm) to 36” (900 mm) and pressure classes in accordance ASME B16.34, 150#, 300# & 600#.
  • Gas service Steel Plug Valve in regular pattern from 3/4” to 2” and 150# (200 CWP)

Product Range
BOTTOM ENTRY COMPENSATOR STEEL PLUG VALVE SIZE PRESSURE CLASS AS PER ASME B16.34 ENDS
Short Pattern API-6D 2″ to 12″ 150, 300, 600 # RF, RTJ or BW
Regular Pattern API-6D 1/2″ to 12″ 600, 900, 1500 & 2500 # RF, RTJ or BW
Venturi Pattern API-6D 6″ to 36″ 150, 300, 600, 900, 1500 # RF, RTJ or BW
TOP ENTRY COMPENSATOR STEEL PLUG VALVE SIZE PRESSURE CLASS AS PER API ENDS
Regular Pattern for offshore design 2 1/16″ to 4 1/16″ 2000, 3000 & 5000 RF, RTJ or BW
TOP ENTRY STEEL PLUG VALVE SIZE PRESSURE CLASS AS PER ASME B16.34 ENDS
Short Pattern API-6D 1/2″ to 8″ 150, 300 # RF, RTJ or BW
Regular Pattern API-6D 1/2″ to 2″ 600 # RF, RTJ or BW
Venturi Pattern API-6D 14″ to 36″ 150 # RF, RTJ or BW
GAS SERVICE STEEL PLUG VALVE SIZE PRESSURE CLASS AS PER ASME B16.34 ENDS
Short Pattern API-6D 3/4″ to 8″ 150 # ANSI, 200 CWP. SW or BW

Walworth Cast Iron  WALWORTH® Iron valves are manufactured in accordance with MSS standards.  The primarily use of this type of valve is the water industry. However, demands are coming more and more from Petroleum Refineries, Chemical plants, Sewage Treatment Plants and Municipalities. WALWORTH® offers this product line in the following base materials: Cast Iron in accordance ASTM A126 Class B offers this product line in the following standard trim:  Bronze trim in accordance with ASTM B62 grade C83600.

Iron Gate

  • MSS-SP-70 OS&Y IRON GATE VALVE SIZES: 2 TO 24” ASME 125
  • Bidirectional flow
  • Minimal pressure drop
  • Smooth operation
  • Operates in fully open or closed position
  • Retains minimal line fluid
  • Seats fixed or screwed into the body
  • Moderate temperature service
  • Metal-metal sealing
  • Bore in accordance with ASME B16.1
  • OS&Y
  • Solid Wedge
  • Bolted Bonnet
  • Vertical or Horizontal Installation
  • Bronze Trim

Iron Globe

  • Single-directional flow
  • High pressure drop
  • Smooth operation
  • Regulates flow
  • Seats fixed or screwed into the body
  • Moderate temperature service
  • Metal-metal sealing
  • ASME B16.1 Reduced bore
  • OS&Y
  • Bolted Bonnet
  • Fully guided disc
  • Loose disc for efficient seal
  • Vertical or Horizontal Installation
  • Bronze Trim

Iron Check

  • Single-directional flow
  • Minimal pressure drop
  • Eliminates counterflow
  • Seats fixed or screwed into the body
  • Moderate temperature service
  • Metal-metal sealing
  • ASME B16.1 Reduced bore
  • Side plug design
  • Bolted Cover
  • Vertical or Horizontal Installation
  • Bronze Trim

Plug Valves Compensator Steel Top Entry SteelTop Entry Iron 1 of 2

Plug Valves Compensator Steel Top Entry SteelTop Entry Iron 2 of 2

Walworth-Pressure _Seal_2011_1

The Gate Valve is used when the need exist for a device that allows an interruption or cut off the flow of a fluid.

Is not recommendable to use Gate Valves for flow modulation as the high velocity of the through may result in erosive damage to the wedge and seats when the valve is partially opened. Under normal operating conditions, the valve should remain either fully open or fully closed. Installation of a Gate Valve is independent of the flow direction.

Design Features
  • Design in accordance with ASME B16.34.
  • WE short pattern; RF & RTJ long pattern as per ASME B16.10.
  • Outside Screw & Yoke (OS&Y).
  • Flexible wedge.
  • Option with Parallel Slide disc available upon request.
  • Handwheel or gear operated depending on the size and class.
  • End to end dimensions as per ASME B16.10.
  • Flange dimensions as per ASME B16.5.
  • Weld end dimensions as per ASME B16.25

 Walworth FORGED STEEL CATALOG   WALWORTH FORGED STEEL VALVES:  WALWORTH offers this product line manufactured in accordance with API-602 and ANSI Classes 800, 1500 and 2500 for socket weld, threaded and combined ends. Available also Integral Flanges in 150, 300, 600 and 1500 either Raised Face or ring type joint ends.  WALWORTH keeps a large quantity of these valves in stock in the most common trims used by the industry. For  Certain Customer applications where forged material is not available (specifically for high nickel alloys), WALWORTH has developed this product line but produced from sand casting. In order to keep the same quality level as forged, these castings are produced with 10 % of each lot to be subject to X-ray examination

 FORGED STEEL, ALLOY AND STAINLESS STEEL TYPE SIZE PRESSURE CLASS AS PER ASME/ANSI B16.34 FOR SW OR NPT ENDS PRESSURE CLASS AS PER ASME/ANSI B16.34 FOR RF OR RTJ ENDS

 Gate 1/4” to 2” 800, 1500 & 2500 150, 300, 600, & 1500

 Globe 1/4” to 2” 800, 1500 & 2500 150, 300, 600, & 1500

 Piston Check 1/4” to 2” 800, 1500 & 2500 150, 300, 600, & 1500

 Ball Check 1/4” to 2” 800, 1500 & 2500 150, 300, 600, & 1500

 Swing Check 1/4” to 2” 800, 1500 & 2500 150, 300, 600, & 1500

 WALWORTH offers the majority of materials known and used for this product line, including but not limited to:  

a) Carbon Steels A105.

 b) Low Carbon Steels LF2, LF3.

 c) Low Alloy Steels F1, F11, and F22.

 d) Medium Alloy Steels F5, F9, and F91.

 e) Stainless Steel Valves F304, F316.

 f) Low Carbon Stainless Steel F304L, F316L.

 g) Duplex Stainless Steel F51, F53.

 h) Nickel Alloys Inconel, and Monel.

WALWORTH® Expanding Gate valves are manufactured and tested in accordance with API-6D.

This type of valve is suitable for onshore and offshore applications where suspended and abrasive solids are present in the fluid or for oil and gas transportation and isolation service.

The double block and bleed design offers a proper seal in between both seats and the gate in both high and low pressure, for this reason line pressure is not needed to seal the valve. The principle of operation is based in two segmented members of a disc which at open or closed position is capable to seal in both directions.

WALWORTH® offers this product line in the following base materials:

a) Carbon Steel such as WCB, WCC.

b) Carbon Steel as per ASTM A216 grade WCB for NACE MR0-175 with 0.25%C maximum and 22HRc maximum hardness.

  • Design in accordance with API-6D.
  • Full thru-conduit port to permit pass scrapers, pigs and wipers.
  • Top entry for maintenance inline.
  • Double block and bleed at open or closed position.
  • Bi-directional.
  • Hand-wheel, Impact Hand-wheel, Chain-wheel, Gear operation, Electric, Pneumatic or Hydraulic Actuation as per Customer requirements.
  • Hard faced option is available for severe service with Tungsten carbide or stellite applied by HVOF process.
  • Test in accordance with API-6D.

WALWORTH® AWWA Butterfly valves comply with AWWA C-504 standard. This type of valve with soft rubber (Buna) seats is used in the water treatment industry.

  • The AWWA WALWORTH® valves can be used for throttling as well as open/close applications. The main features are a leak proof hermetic seal, easy installation and operation at the maximum differential pressure. The soft Buna seats run the entire 360° of the disc, thus reducing turbulence and pressure drop. Butterfly valves are used in power generation, pollution control, the pulp and paper industry, water and waste water treatment facilities worldwide. WALWORTH® offers this product line in the following base materials: a) Cast Iron ASTM A126 grade Bb) Ductile Iron ASTM A536 grade 65-45-12c) Alloy Cast Iron ASTM A436 grade 2d) Cast Steel ASTM a 216 grade WCBe) Stainless Steel ASTM 351 grade CF8 M (Not listed by AWWA C-504,
    but avalaible upon request). 

    Design Features

    • Design in accordance with AWWA C-504.
    • Uninterrupted 360° seat.
    • Underground installation.
    • Manual and automated operation as per Customer requirement.
    • Class A (maximum velocity at 8 feet per second).
    • Class B (maximum velocity at 16 feet per second).
    • Test in accordance with API-598.
    • Available disc in Aluminium Bronze ASTM B148 grade
    • Soft Seat in Neoprene (180ºF) & EDPM (275ºF) also available as per Customer request.

     

    Product Range

     

    TYPE SIZE PRESSURE CLASS AS PERAWWA C-504 ENDS FIGURE Nr.
    Ductil Iron Butterfly Valve Short Body 3” to 72” 75 A and B FF OR RF 2111 (75A); 2110 (75B)
    Cast Iron Butterfly Valve Wafer Body 3” to 72” 150 B FF OR RF 2114 (150B)
    Ductile Iron Butterfly Valve Short Body 3” to 72” 150A & 150B FF OR RF 2117 (150A); 2116 (150B)