Pilot Operated Check Valves

　　These check valves allow flow in one direction and prevent flow in the reverse direction, until operated by pilot pressure to allow free reverse flow. The specified cracking pressure is required to open the valve to allow free flow direction.

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　　一、 Specifications

　　二、Model Number Designatioin

　　Notes: Special seals (Viton seals) are required when phosphate ester type fluids are used. (Prefix "F-" to the model numbers when ordering.)

　　三、Instructions

　　1. Operation of internal and external drain types

　　When the outlet side P1 is directly connected to the tank in reversed free flow (Fig. a), the internal drain type is normally used. When the back pressure is applied to the outlet side P1 (Fig. b), be sure to use the external drain type.

　　2. Minimum pilot pressure characteristics

　　That depends on the pressure of the inlet side P2 in the reversed free flow. This value can be determined from the characteristics chart.

　　Notes: Please call our company telephone 021-67687301, 67687302 to buy "Pilot Operated Check Valves" products. Browse this webpage carefully to know more about Pilot Operated Check Valves.