Pressure safety valve

Details Pressure safety valve Pressure safety valve

1974-11-08

1976-03-23

Cline, William R.

Valves and valve actuation

Valve

Removable seat engaging element

251360, 251362, 251368, 137540, 137542, 13754315, F16K 134

Patent

active

039456072

ABSTRACT:
A safety valve for use in gaseous service at elevated temperatures, including a casing provided with an annular valve seat and a selectively moveable valve member having mounted thereon a plastic annular sealing ring for seating on the valve seat. The plastic annular sealing ring is preferably formed of Teflon P.F.A. fluorocarbon and is shrunk fit onto a projecting shoulder portion of a metal seal retainer detachably mounted on the valve member, and the valve seat includes a projecting ridge formed by intersecting flat surface portions disposed at an obtuse angle to one another, whereby the plastic annular sealing ring will be engaged by the valve seat ridge when the valve member is seated.

REFERENCES:
patent: 2117044 (1938-05-01), Spence
patent: 2601563 (1952-06-01), Selwyn
patent: 2666448 (1954-01-01), Garretson et al.
patent: 2815040 (1957-12-01), Smith
patent: 2961214 (1960-11-01), Freed
patent: 3382894 (1968-05-01), Shurtleff et al.

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