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RW Gate Company
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RW - Stainless Steel Mud Valves

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Submittals shall include, at a minimum, detailed custom drawings of the mud valve assembly with dimensional and mounting information and a listing of the materials of construction. General arrangement drawings and cut sheets are not considered acceptable drawings.

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QUALITY ASSURANCE

  1. The basis for the design of the mud valves is the Model RW7200-S as manufactured by RW Gate Company of Troy, New York.
  2. All valves shall be shop inspected for proper operation prior to shipment.
  3. Welds shall be performed by welders with ASME Section IX certification.
  4. The valve manufacturer shall be ISO 9001:2015 certified.  

MATERIALS OF CONSTRUCTION

  1. All stainless steel referenced in this specification shall be Type (304)(316) or Type (304L)(316L), ASTM A240 or ASTM A276 unless otherwise indicated herein.
    1. All welded stainless steel components shall be constructed of minimum ¼-inch Type (304L)(316L) stainless steel.  
    2. All non-welded stainless steel components, excluding anchor bolts and assembly bolts, shall be Type (304)(316) or Type (304L)(316L) stainless steel.
    3. Anchor bolts and assembly bolts shall be Type 316 stainless steel.  

ASSEMBLY

  1. The mud valve shall be a one-piece assembly with a non-rising stem, a movable cover and a fixed, integral frame.
  2. The frame will be provided with a bolt pattern to mount to a pipe flange or to a concrete floor.
  3. The mud valve cover shall be designed to lower into place over the opening for tight shut-off.
    1. The cover and frame shall be constructed of stainless steel plate.  
    2. A resilient seal shall be mounted to the bottom of the cover.  Mud valves with metallic seats are not acceptable.