Pilot-operated gas shut-off valve and gas pressure reducing valve

Abstract

The utility model provides a pilot gas cut -off valve structure and gas pressure reducing valve thereof, including valve seat and gas cut -off subassembly, be equipped with the cut -off valve cavity of left opening on the valve seat, gas cut -off subassembly sets up in cut -off valve cavity, the left side opening of cut -off valve cavity is equipped with the side cover, gas cut -off subassembly includes valve core, return spring, lip seal ring and sealing pad, valve core is placed in cut -off valve cavity, the left end of valve core is equipped with valve core chamber along the axial direction, the lateral wall of valve core chamber is equipped with the step surface, the right end of return spring sets up in valve core chamber and abuts on the step surface, the left end of return spring abuts on the valve cover, the outer wall of valve core left end is equipped with the positioning convex ring, lip seal ring sets up on the positioning convex ring, and sealed between valve core and cut -off valve cavity, cut -off valve cavity right side and air inlet buffer chamber intercommunication, and the right end of valve core is equipped with sealing pad.

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