Series 52-SC Swing Check Valves - Lever and Spring


AWWA C508 200 PSIG


  1. Check valves shall be manufactured from gray iron meeting or exceeding ASTM A126 Grade B.
  2. Check valves are to comply with ANSI/AWWA C508, latest revision for use in water works service. 
  3. The rated working pressure of check valves 3 in. through 12 in. shall be 200 psig with a test pressure of 400 psig. The rated working pressure of check valves larger than 12 in. shall be 150 psig with a test pressure of 300 psig.
  4. Check valves shall be Certified to NSF/ANSI 372.
  5. The disc on check valves 4 in. and larger shall be made of gray iron with a bronze disc ring securely fastened into grooves machined in the disc. 
  6. Valve body shall a threaded-in bronze seat ring.
  7. The connection between the disc and clapper arm shall be designed with sufficient clearance to allow the disc to adjust to the seat.
  8. The clapper arm shall be made of ductile iron conforming ASTM A536 and shall exhibit a be bronze-bushed design to accommodate the disc assembly.
  9. Clapper arm shaft shall be made of a high tensile strength, corrosion resistant stainless steel.
  10. Clapper arm assembly shall mate with the valve body by using mounted bronze retaining plugs.
  11. In applications requiring a lever and weight, or lever and spring design, where the clapper arm shaft extends outside the valve body, a double O-ring seal fully contained within the shaft bearing shall be provided. The lever and shaft design shall employ the use of a grease fitting for lubrication between the O-rings.


  1. Disc shall not contact the body when the valve is in the full open position and shall swing clear of the waterway. Disc shall remain in the closed position when installed in a horizontal pipeline under no-flow condition.
  2. Disc shall exhibit a clear-waterway as defined by ANSI/AWWA C508 and a Type 3 clear-waterway as defined by MSS SP-71.


  1. Valves to be coated internally with a NSF 61 Certified coating Exterior shall be coated with a primer suitable for field application of a comparable top coat.


  1. Valve to be designed for use in water and wastewater applications. Check valves equipped with lever and weight, or lever and spring, can be used in a horizontal pipeline, or in a vertical pipeline only when flow is in an upward direction. The lever orientation shall be field adjustable and must be positioned correctly for the installation.


  1. Valves shall be equal to AMERICAN Flow Control’s Series 52-SC Swing Check Valve.