Valve

Details Valve Valve

1991-07-22

1992-06-09

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

251172, 251175, 251359, F16K 142, F16K 1506

Patent

active

051198584

ABSTRACT:
A valve comprises a valve member engageable with a valve seat provided in a valve body, an annular seal slidably supported on the valve member or adjacent the valve seat and having an axial end face which is sealing engageable with the valve seat or valve member respectively on engagement of the valve member with the valve seat, the axial end face providing at least some of the sealing between the valve member and valve seat. In use the differential in pressure existing between the upstream side of the valve member, and thus closed space, and the downstream side of the valve member when the valve is closed produces an axial force on the seal to drive it axially into sealing engagement with the valve seat or valve member respectively. Any wear of the axial end face of the seal is accommodated by such axial movement.

REFERENCES:
patent: 1983797 (1934-12-01), Greve
patent: 3618893 (1971-11-01), Bois
patent: 4064904 (1977-12-01), Tolnai
patent: 4530373 (1985-07-01), Bork

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