Valve body-bonnet joint

Details Valve body-bonnet joint Valve body-bonnet joint

1977-03-02

1978-07-04

Rosenthal, Arnold

Valves and valve actuation

Reciprocating valve

Gate

251367, 220240, 220353, F16K 2712

Patent

active

040984907

ABSTRACT:
A flange joint for a valve body and the associated bonnet has a planar flange sealing surface around the body opening and a mating flange around the bonnet. The valve body flange has a raised portion around an inner portion extending above a planar sealing surface. The bonnet flange has a substantially rigid outer portion and a deflectable inner portion with a planar flange sealing surface on the exposed side thereof. The deflectable portion contacts the body flange raised portion in sealing contact and is deflected as the flange sealing surfaces are brought together by fasteners. The bonnet member deflectable portion maintains a seal around the valve body flange in the event the fasteners relax under high temperature conditions or high pressure.

REFERENCES:
patent: 1828478 (1931-10-01), Sparks
patent: 3007600 (1961-11-01), Horner

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