FIELD: construction.
SUBSTANCE: invention relates to pipeline valves, in particular, to sealing gaskets connections out-of-round surfaces of pipeline valves. Sealing gasket out-of-round coupling sealing surfaces is located in groove made in one of sealing surfaces of pipeline valves. Groove has on both sides axially-extending ledge made along its edge. Sealing gasket consists of adjacent mirror-symmetrical axially two sealing rings. In locking position under action of working medium pressure difference, sealing surface located on side with low pressure seal ring is tightly for fluid medium is pressed to wall of groove. Also, under effect of working medium pressure difference, seal arm located on side with low pressure seal ring is tightly for fluid medium pressed to collar, axially extending in groove made at its edge. Sealing cup arranged at side with low pressure seal ring is tightly for fluid medium pressed to adjacent sealing surface.
EFFECT: invention provides tightness of joint surfaces of pipeline valves in both directions of working medium pressure difference and in various operating temperatures.
11 cl, 7 dwg
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