U.S. Plastic Corporation SMC PVC Check Valves for Air or Liquid 22173

Maximum Operating Pressure 140 psi. Maximum Operating Temperature 140F. Seat Area Open Diameter .250. The 426 Series Check Valve design promotes multiple configurations to fit the exact end use application. Gray PVC with 1 psi stainless spring and ball is the standard configuration. PVC is a NSF Standard 61 Approved Material. Buna-N Seals are rated for a temperature range of 210 to 250F and the Viton Seals are rated for temperatures of 450 to 600F.