Valves having a turnable closure member such as a butterfly valv

Details Valves having a turnable closure member such as a butterfly valv Valves having a turnable closure member such as a butterfly valv

1990-01-10

1991-01-29

Fox, John C.

Valves and valve actuation

Rotary valves

Butterfly

251307, F16K 122

Patent

active

049880764

ABSTRACT:
A butterfly valve seat structure has a polymeric sealing head slidably supported on the radially inner portion of a flat metal washer so as to be capable of radial sliding movement on the washer, a radially outer portion of the washer being rigidly clamped between the valve housing and the seat retaining ring, and a radially intermediate portion of the washer is capable of axial movement relative to the axis of the valve passage to facilitate axial movement of the sealing head. Axial projections on the head serve to resist any tendency to blow-out of the sealing head. The combined abilities of the sealing head to move axially and radially help to provide a good sealing action against the valve disc.

REFERENCES:
patent: 4005848 (1975-02-01), Eggleston
patent: 4289296 (1981-09-01), Krause

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