SAFETY SHUT-OFF DEVICE Russian patent published in 1998 - IPC

FIELD: chemical, petrochemical and radiochemical industries. SUBSTANCE: body of safety shut-off device contains diaphragm unit consisting of upper and lower clamping rings with flapping bursting diaphragm and breaking member located between them. Lower clamping ring is provided with guide fins. Upper clamping ring is made in form of turned-over sleeve with ports in its side wall, sealing surface and device for securing to drive member. Threaded tail-piece of breaking member is screwed into central portion of sleeve bottom from below for control of breaking member position. EFFECT: enhanced reliability. 1 dwg