Seal for coupling or valve assemblies

Fluid handling – Line condition change responsive valves – Direct response valves

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Details

251212, 251298, 251900, 277212C, F16K 1503, F16K 2500, F16J 1548

Patent

active

045850267

ABSTRACT:
A seal for coupling or valve assemblies employing flapper valves or the like has two axially and radially offset annular sealing members that are integrally joined by a relatively thin folding web section that provides the necessary flexibility to the seal. The radially outer sealing member is adapted to be clamped by a valve plate to the coupling or valve assembly housing to provide a first static seal surrounding the flow passage in the housing, whereas the radially inner sealing member essentially floats at the axial inner end of the web. The radially inner sealing member is adapted to be engaged by the flapper valve when moved to the closed position to provide a second static seal at the flapper valve face preventing flow through the coupling or valve assembly in either direction. Due to the flexibility of the seal, the sealing member will take up any small amount of tolerance conditions and will follow the location and contour of the flapper valve to provide the required sealing function under adverse tolerance conditions.

REFERENCES:
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patent: 3847373 (1974-11-01), Hagar
patent: 3865386 (1975-02-01), Wilke
patent: 4073473 (1978-02-01), Rihm et al.

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