FIELD: machine building.
SUBSTANCE: invention is related to the field of valve building, in particular to check valves, and is intended for prevention of back flow in gas, oil lines of high pressure, in power engineering. Check valve with axial direction of flow comprises external body with inlet and outlet channels. Internal cavity of body contains the following components arranged with creation of circular channel - rigidly fixed fairing, circular seat and contacting spring-loaded stop element with inseparably fixed stem. Stem moves in sliding bearings along flow axis. Sealing surface of stop element is arranged in the form of sphere part. Centre of this sphere is arranged in the middle of distance between external ends of support bearings of stop element stem in closed position of valve. Sealing surface of seat is arranged as conical and tangential to specified sphere.
EFFECT: improved reliability of valve by increase of tightness extent with reduction of manufacturing prime cost.
7 dwg
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