Selective double backseat for valve stems

Details Selective double backseat for valve stems Selective double backseat for valve stems

1992-04-30

1993-06-22

Rosenthal, Arnold

Valves and valve actuation

Reciprocating valve

Actuator controlled stem seal

251214, F16K 4104, F16K 4114

Patent

active

052210634

ABSTRACT:
The invention is directed to a valve stem double backseat seal wherein the rising stem first engages a non-metallic radial seal and then axially engages the metal backseat shoulder of the valve bonnet.

REFERENCES:
patent: 4082105 (1978-04-01), Allen
patent: 4373700 (1983-02-01), Buchta
patent: 4527806 (1985-07-01), Ungchusri et al.
patent: 4585210 (1986-04-01), Adams

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