Poppet Check Valves

CV, CH, and CO Series

Features

CV Series

◎ Resilient O-ring seat design for leak-free sealing
◎ Working pressure up to: 3000 psig (207 bar)
◎ Working temperature: -10°F to 375°F (-23°C to 190°C)
◎ Cracking pressure: 1/3 to 25 psig (0.02 to 1.7 bar)
◎ Variety of end connections and materials available
◎ Non-adjustable cracking pressure, mountable in any direction

CO Series

◎ Resilient O-ring seat design for leak-free sealing
◎ Working pressure up to: 3000 psig (207 bar)
◎ Working temperature: -10°F to 375°F (-23°C to 190°C)
◎ Cracking pressure: 1/3 to 25 psig (0.02 to 1.7 bar)
◎ Variety of end connections and materials available
◎ Non-adjustable cracking pressure, mountable in any direction

CH Series

◎ Compact design, one-piece body
◎ Working pressure up to: 3000 psig (207 bar)
◎ Working temperature: -10 °F to 375°F (-23°C to 190°C)
◎ Cracking pressure: 1/3 to 25 psig (0.02 to 1.7 bar)
◎ Variety of end connections and materials available
◎ Non-adjustable cracking pressure, mountable in any direction

Cracking Pressure and Reseal Pressure

Cracking pressure – the upstream pressure at which the first indication of flow occurs.
Reseal pressure – the pressure at which there is no indication of flow.
Back Pressure differential pressure between the inlet and outlet pressures.

Series	Nominal Cracking Pressure psig (bar)	Cracking Pressure Range psig (bar)	Reseal Pressure Range psig (bar)
CV	1/3 (0.02) 1 (0.06) 3 (0.21) 10 (0.68) 25 (1.7)	0 to 3 (0 to 0.21) 0 to 4 (0 to 0.28) 1 to 5 (0.06 to 0.34) 7 to 15 (0.49 to 1.1) 20 to 30 (1.4 to 2.1)	≤6 (0.42)Back Pressure ≤6 (0.42)Back Pressure ≤6 (0.42)Back Pressure ≥3 (0.21)Inlet Pressure ≥17 (1.2)Inlet Pressure
CH	1/3 (0.02) 1 (0.06) 3 (0.21) 10 (0.68) 25 (1.7)	0 to 3 (0 to 0.21) 0 to 4 (0 to 0.28) 1 to 5 (0.06 to 0.34) 7 to 15 (0.49 to 1.1) 20 to 30 (1.4 to 2.1)	≤6 (0.42)Back Pressure ≤5 (0.35)Back Pressure ≤2 (0.14)Back Pressure ≥3 (0.21)Inlet Pressure ≥17 (1.2)Inlet Pressure
CO	1/3 (0.02) 1 (0.06) 3 (0.21) 10 (0.68) 25 (1.7)	0 to 3 (0 to 0.21) 0 to 4 (0 to 0.28) 1 to 5 (0.06 to 0.34) 7 to 15 (0.49 to 1.1) 20 to 30 (1.4 to 2.1)	6 to 20 (0.42 to 1.4)Back Pressure 5 to 20 (0.35 to 1.4)Back Pressure 3 to 20 (0.21 to 1.4)Back Pressure 3 to 10 (0.21 to 0.68)Back Pressure ≥5 (0.35)Inlet Pressure