Valves and valve actuation – Reciprocating valve – Gate
Patent
1982-01-27
1984-09-18
Schwadron, Martin P.
Valves and valve actuation
Reciprocating valve
Gate
251328, 251333, 251363, F16K 302
Patent
active
044719434
ABSTRACT:
A gate valve and seat therefor, the valve including a valve body defining a longitudinal flowway and a valve element mounted in the valve body and movable transverse to the flowway between open and closed positions. A valve seat is mounted in the valve body for limited axial floating movement with respect to the valve body, the seat comprising a seat body having a generally axially facing contact face for engagement with one side of the valve element. The contact face has an annular groove therein intermediate its radially inner and outer extremities, and the seat body further has at least one vent communicating with the annular groove and extending outwardly therefrom to the radially outer extremity of the seat body.
REFERENCES:
patent: 3245429 (1966-04-01), Bacino et al.
patent: 3347261 (1967-10-01), Yancey
patent: 3348567 (1967-10-01), Volpin
patent: 3349789 (1967-10-01), Crain et al.
patent: 3696831 (1972-10-01), Fowler et al.
patent: 4376526 (1983-03-01), Freeman
NL Industries Inc.
Schwadron Martin P.
Shay James R.
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