In service exercisable tilt disc check valve

摘要: An in service exercisable tilt disc check valve is provided having an externally controlled power actuator connected to the shaft for moving relative seat. The has a radially extending tooth which received elongated sector socket disc. As rotated, engages end shoulders of and provides connection between With positioned intermediate ends, free swing on shaft. By selectively positioning shaft, may be forced close against seat inspect sealing integrity or displaced from "exercise" valve. also allow pivot normally as A pneumatic cylinder coupled through rack gear drive while second limits degree extension cylinder. compression spring biases closed position.