SHUT-OFF VALVE Russian patent published in 1994 - IPC

FIELD: valving. SUBSTANCE: shut-off unit is made of a steel ball received in an inlet chamber, bottom made of magneto-soft material and permanent magnet which is coupled with a diaphragm and interacts with the bottom. An outlet chamber is provided with a piston with a rod which interacts with the steel ball. Under-piston space of the chamber is in communication with a space of inlet pressure and atmosphere through valves. Under-diaphragm space is in communication with a pipe line of outlet pressure. EFFECT: improved structure. 1 dwg