Valve and stem seal therefor

Details Valve and stem seal therefor Valve and stem seal therefor

1982-06-30

1985-07-30

Walton, George L.

Valves and valve actuation

Mechanical movement actuator

Particularly packed or sealed

277205, 277207A, F16K 4104

Patent

active

045317119

ABSTRACT:
A valve having a valve member with a stem connected to an actuator and an improved stem seal for sealing between the stem and the interior of the body on a bonnet attached thereto. The improved stem sealing assembly includes a U-shaped resilient seal ring with means in its open end to ensure sealing engagement of the multiple internal and external sealing lips with the stem and body sealing surfaces and support rings positioned in grooves between the sealing lips and anti-extrusion means engaging the closed end of the seal ring to prevent extrusion of the seal ring. A modified sealing assembly also includes a back-up seal and anti-extrusion means therefor.

REFERENCES:
patent: 851746 (1907-04-01), Hageman
patent: 2417828 (1947-03-01), Joy
patent: 2891827 (1959-06-01), Butkus
patent: 3048412 (1962-08-01), Baker
patent: 3192942 (1965-07-01), Manor et al.
patent: 3271038 (1966-09-01), Bastow
patent: 3554569 (1971-01-01), Gorman
patent: 3788600 (1974-01-01), Allen
patent: 3907307 (1975-09-01), Maurer et al.
patent: 4169604 (1979-10-01), Heathcott
patent: 4327923 (1982-05-01), Chesterton et al.
patent: 4410189 (1983-10-01), Myers et al.

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