NON-RETURN VALVE FOR GASOHYDRAULIC APPARATUSES Russian patent published in 2002 - IPC

FIELD: valves for closing cross section of ducts of gasohydraulic different-designation apparatuses at planned or emergency shutdown of medium feed, protection of pump aggregates and pipelines against hydraulic shocks. SUBSTANCE: non-return valve includes housing with narrowed portion at front side along motion direction of working fluid; seat with sealing surface and annular turning at back side. Inside housing elastic locking organ is hinged. Said organ is reinforced with rigid members and it is made integrally with hinge and with sealing annular gasket arranged in annular turning of housing. Stop member is placed in housing. Engaging surface of stop member is flush-mounted in annular sealing surface of seat. Front portion of stop member does not extend outside housing contour. Reinforcing members of elastic locking organ are arranged at least by two mutually parallel rows and they are shifted in rows according to predetermined condition in such a way that reinforcing member of previous row close gaps between reinforcing members of next row. EFFECT: enhanced reliability, lowered labor consumption for making, assembling and mounting valve, reduced size and mass. 19 cl, 9 dwg