SHUT-OFF DEVICE FOR EMERGENCY SHUTTING-OF OF PIPE LINE Russian patent published in 2003 - IPC

FIELD: manufacture of fittings; protection of pipe line against losses of medium in case of break of pipe. SUBSTANCE: proposed shut-off device has body, inlet pipe union with filter, outlet pipe union and gate made in form of spring-loaded diaphragm with valve having axial hole and sealing member located at end face of outlet pipe union. Outlet pipe union adjoins valve; it is provided with spring and is movable in axial direction. EFFECT: enhanced reliability of shutting0off of pipe line. 6 cl, 1 dwg