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Rockwell Edward Valves

Edward Valves

Manufacturers names: Edward Valves, aka Rockwell Edward Valves, aka Flowserve Edward Valve have been producing cast steel, alloy steel, and forged carbon steel valves as Edward Valves for power plants and process facilities for more than one hundred years. Edward Valves, currently known as Flowserve Edward Valve produces Globe Valves, Gate Valves, Check Valves, and Stop-check Valves for high temperature and high-pressure services, as well as valves for critical service conditions that meet standards specified by power plants and ASME pressure vessel codes. These standards meet or exceed general manufacturers’ standards for process valves.

Cast Steel Valves

Basic cast carbon steel, grade ASTM A216 WCB, WCC, LCB, and LCC are designed for temperatures up to 800° F. 

High-Temperature Valve

The high-temperature valve incorporates ASTM A217 cast alloys such as WC6, WC9, C5 and C9, C12, or Flowserve Edward forged steel forgings in ASTM A182, grades F11, F22, F5, and F9. High temperatures or corrosive service media for critical service conditions utilize austenitic or low carbon or “L” grade stainless steels ASTM A182 F316, 317, 347, and Alloy 20. Where circumstances in process facilities demand very high-temperature valves, the specified choice is Inconel or High carbon stainless steel.

Valves for high-pressure services

Valves for high-pressure services or process valves for critical service conditions where pressure /temperature dynamics require a pressure rating that exceeds actual service conditions, high-pressure valves are the specified choice because they carry both a steam rating and a WOG, or CWP rating. High-pressure services are generally considered as working conditions above 800 psi. They are available in all alloys. Consult Authorized Parts website pressure /temperature charts for recommendations.

Valves for critical service conditions

Valves for critical service conditions or severe service conditions are designated as such because circumstances in facilities with process lines may expose operators to potential harms, Thus, a process involving flammables, high temperature, toxic materials such as phenol, hydrogen sulfide, and chlorine, or acids and caustics, especially at higher pressure ratings require careful consideration in the selection process. Consult Authorized Parts website for corrosion resistance charts for material recommendations.

Flowserve Edward Forged Steel Valves

Flowserve Edward Forged Steel Valves are smaller design valves built with threaded ends, socket-weld ends, or flanged ends up to 3”. Flowserve Edward Forged Steel Valve bodies are forged in ASTM A105 Carbon Steel, ASTM A350, LF2, ASTM A182, Grade F91 – 9Cr – 1Mo – V, ASTM A182, Grade F11, Class 2 (0.15 Carbon max.) 1-1/4Cr – 1/2Mo, ASTM A182, Grade F316 / F316L – 18Cr – 8Ni – 3Mo, ASTM A182, Grade F22, Class 3 (0.15 Carbon max.) 2-1/4Cr – 1/2Mo, ASTM A182, Grade F316H – 18Cr – 8Ni – 3Mo, and ASTM A182, Grade F5 – 5Cr – 1/2Mo for a variety of service conditions. 

Globe Valve

The Rockwell, Flowserve Edward, Rockwell Edward, Edward, Edward Valves, Flite-Flow, or Uni-Valve designed globe valve is the specified choice within the power plant industry and wherever process facilities need reliable regulating valves for high-pressure services. The globe valve in diameters above 3” are cast steel valves. Below 3” they are Flowserve Edward Forged Steel Valves. The globe valve is built as a T-pattern or 45-degree offset Y-pattern. For critical service conditions, the specified choice includes combinations of cast steel or alloy steel body with ASTM A182 F316, 317, 347, and Alloy 20 trim.

Submit your RFQ on Authorized Parts website easy to use form at: and we will make a product recommendation based upon service conditions.

Gate Valve

See Edward Valves, aka Rockwell Edward Valve, aka Flowserve Edward Valve under the name Equiwedge. 

The Equiwedge gate valve is built in WCB, WCC, WC6, WC9, C5, C9, or C12 grades of cast steel. 

Check Valve

Edward Valves, aka: Rockwell Edward Valve, aka: Flowserve Edward Valve, check valves are built in cast steel WCB, WCC and alloy steel LCB, LCC, WC6 WC9, C5, C9, and C12.

Select a pattern and pressure class of Angle Pattern Check Valve, Piston Check Valve, Swing Check Valve, Stop-check Valve, or Spring-loaded Vertical Check Valve.

How to identify Edward Valves

If no Figure Number is visible on the body casting, a valve can normally be distinguished by the shape and pattern. Markings may include Rockwell, Flowserve Edward, Rockwell Edward, Edward, Edward Valves, Flite-Flow, Uni-Valve, or Equiwedge. The grade of steel, WCB, WCC, WC6, WC9, C5, C9, or C12 will be cast into the valve. The shape of the casting will identify the valve as a Globe Valve, Gate Valve, Check Valve, or Stop-check Valve. A check valve can be a piston check, swing check, or lift check. Consult the technical guide in the Authorized Parts Technical Library to determine the manufacturer’s figure number. The pressure class will also be cast into the valve, or stamped into the forging if the valve is a Flowserve Edward Forged Steel Valve. Pressure Class markings can be Class 300, 400, 600, 700, 900, 1100, 1500, 1800,2000, 2500, 2900, 3600 and 4500.

How to Order

Submit your RFQ on Authorized Parts website easy to use form at: and we will quote. Please include Size and Figure Number, or: Size, Valve Type, Body and Trim material, Pressure Class, end connections, and any special requirements.


Yes. Other manufacturer’s valves cross-reference to Rockwell Edward valves and Flowserve Edward Forged Steel Valves and vice versa. Powell, Pacific, Velan, and Lunkenheimer are examples of manufacturers with equivalent products. However, not all design features are the same, so care should be taken when evaluating.

Yes. All valve testing requirements can be made available for all Edward valves and Flowserve Edward Forged Steel Valves, including MTR’s, NDE, Pressure Testing, Radiography Testing, Magnetic Particle, Dye Penetrant, PMI, Positive Material Identification, Hardness Testing, and Failure Analysis.

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