MSS SP-71 ANSI Swing Check Valve

Cast Iron, Ductile Iron

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MSS SP-71 ANSI Swing Check Valve Product Information

MSS SP-71 ANSI swing check valve is also called one-way valve or non-return valve, which is used to prevent of mediums back flow in the pipeline. The disc of the check valve is action depending on the mediums itself flow pressure, so the check valve is belong to automatic valve types. Because the ANSI swing check valve is only allowed the mediums to flow in one direction, we should note the arrowhead on the check valve when mount it in horizontal position. MSS SP-71 swing check valves are widely used in series of industries, especially in water project, water plant, water treatment, etc. Flowspec Luokai can manufacture the MSS SP-71 ANSI swing check valve with sizes of 2” ~ 12” (DN50~DN300mm). Welcome to contact us for detailed information and best quotes if you have any questions or inquiries. 


  • Standard swing type disc
  • Standard renewable seat
  • BC, bolted cover
  • Horizontal or vertical service
  • Flanged ends


  • Design & manufacturing: MSS SP-71 
  • Face to face: ANSI B16.10
  • Flanged ends: ANSI B16.10
  • Inspection & testing: API598
  • Special request: WRAS approved


  • Class: 125LB ~150LB
  • Size: 2” ~ 12” (DN50~DN300mm)
  • Materials: cast iron ASTM A126 class B, ductile iron ASTM A536 65-45-12
  • Applicable medium: water, oil, gas
  • Applicable temperature: -10℃ ~ +80℃ 
  • Working pressure: 125S, 200WOG


  • Water works, water projects
  • Environment protection
  • Public facilities
  • Power plant
  • Building industry, real estate
  • Water treatment

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