FIELD: valve engineering.
SUBSTANCE: check valve has housing with inlet and outlet branch pipes and spring-loaded closure member. The closure member co-operates with the conical seat. The seat receives the conical insert which is mounted concentrically and with a spaced relation to the seat. The insert is made of a pressing ring. The ring is provided with conical flange made of a sealing members provided with flexible sealing member on its surface. The sealing member is pressed by the bearing bushing to form a space between them and receive the flexible ring. The face of the flexible sealing member which points inward the space is made conical for permitting interaction with the flexible ring. The bearing bushing is provided with passages. The passages connect the space with the outlet space. Te flexible sealing member and flexible ring are made of an elastomeric material.
EFFECT: enhanced reliability and pressure tightness.
2 dwg
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