PRESSURE-REDUCING VALVE Russian patent published in 1997 - IPC

FIELD: valving. SUBSTANCE: inlet opening in the housing is overlapped with a shutoff device mounted on a spring-loaded pusher to which flexible diaphragms are secured via the pressing disks. The outer edges of the diaphragms are rigidly secured between the housing, ring and clamp to form three spaces. The space between two diaphragms is tightly sealed from the above-diaphragm and under-diaphragm spaces. The under-diaphragm space is coincident with the space of the outlet branch pipe. The areas of the diaphragms are different. The smaller diaphragm is arranged from the side of the coincident space. The pusher is provided with a passageway that connects the coincident space with the above-diaphragm space. EFFECT: enhanced reliability. 1 dwg