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Classic Diaphragm-Poppet Series

Humphrey offers a unique check valve, including an air pilot override, via our classic Diaphragm-Poppet Series. Humphrey Pilot Operated Check Valves function as check valves until an air pilot signal overrides the check function, allowing full flow in either direction. These valves return to normal checking function once the air pilot signal is removed. Available in 1/8 and 1/4 pipe sizes.

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