Check valve and a seal for a check valve
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United States of America Patent
Stats
-
Nov 17, 1987
Grant Date -
N/A
app pub date -
Jul 18, 1986
filing date -
Nov 19, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A horizontal check valve has a swinging clapper (16) eccentric with a tapered valve seat (14) and carrying a floating ring seal. There is clearance between the clapper (16) and the passage wall at the bottom so that reverse flow urges the ring seal into the taper. The clapper (16) abuts an abutment surface (15) formed by the valve body (10) around the valve seat so that the hydrostatic forces exerted on the clapper (16) by the reverse fluid flow are reacted by the abutment surface and not by the tapered seat (14).
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