4"-12" Resilient Wedge NRS Gate Valves with ALPHA Restrained Joint Ends



Sample Specifications for Resilient Wedge Gate Valves with Alpha Ends


  1. Valves shall meet or exceed ANSI/AWWA C515, latest revision for water supply service.
  2. Valves size shall be of a resilient wedge design with a rated working pressure of 250 psig.
  3. All cast ferrous components shall be ductile iron and shall be manufactured in compliance with the latest edition of ANSI/AWWA C515.
  4. All valves shall be certified to NSF/ANSI Standard 61.
  5. Valve to be designed for use in drinking water, sewage, fire protection systems, irrigation and backflow control systems.


  1. The valve body design shall be lightweight in design and easy to handle. Valve body and bonnet shall be constructed of ductile iron with wall thickness per Table 2, of ANSI/AWWA C515. Heavy wall or and/or cast gray-iron bodies are not acceptable.
  2. The valve shall have a smooth and oversize waterway and have the marking “DI” or “Ductile Iron” cast onto the body.
  3. All wedges shall be constructed of ductile iron. Wedge shall be fully encapsulated with EPDM rubber and provided with polymer wedge guide covers.
  4. Valve stuffing box and wrench nut shall be made of ductile iron.


  1. Valve stems shall be sealed by three O-rings.
  2. Two of the stem O-rings shall reside above the thrust collar. One O-ring shall be located below the thrust collar which creates a sealed lubrication chamber around the stem thrust collar.
  3. O-rings set in a cartridge shall not be allowed.
  4. The valve shall also be equipped with thrust washers above and below the stem thrust collar for reduced operating torque.


  1. All exterior valve body bolting shall be Type 304 stainless steel and shall be provided with hexagonal heads with dimensions conforming to ANSI B18.2.1.
  2. Metric sizes and / or socket head cap screws, or bolts, are not allowed.
  3. The operating nut shall be 2 in. square and shall be constructed of ductile iron fitted to a square tapered stem to help ensure even distribution of input torque.
  4. The body-to-bonnet and stuffing box seals are pressure energized O-ring style designs that reduce the need for excessive bolt loading. The seals shall be reusable.


  1. All internal and external ferrous surfaces of the valve body and bonnet shall have fusion-bonded epoxy coating, complying with ANSI/AWWA C550.


  1. Valve inlet shall be designed for use with ductile iron, cast iron, HDPE and PVC pipe materials.
  2. Inlet shall incorporate stab-fit design requiring the use of only one Type 304 stainless steel fastener. The assembly of flange or mechanical joint restrainers using multiple fasteners or wedge bolts is not permitted.
  3. Restraint accessories shall be factory installed.
  4. All valve inlets shall be the ALPHA design furnished by AMERICAN Flow Control.


  1. All valves shall be the AMERICAN Flow Control Series 2500-1 Resilient Wedge Gate Valves with ALPHA Ends.