Protected bellows for valve

Details Protected bellows for valve Protected bellows for valve

1990-09-12

1991-10-15

Walton, George L.

Valves and valve actuation

Reciprocating valve

Actuator controlled stem seal

251267, 2513353, 277200, F16K 102, F16K 144, F16K 4110

Patent

active

050567594

ABSTRACT:
A valve apparatus comprises a valve body having a fluid passage therein including a valve seat. A valve member, having a head and stem, is movable in the body between valve open and valve closed positions determined by the proximity of its head to the valve seat. The valve member is engageable in sealing relation with a portion of the valve body between the valve seat and a valve stem packing to block fluid in the passage from contacting and leaking between the valve stem and packing. This sealing relation also serves to protect a bellows, connected between the valve member and valve body, from contact with fluid in the fluid passage.

REFERENCES:
patent: 2105864 (1938-01-01), Saunders
patent: 3090403 (1963-05-01), Kroekel
patent: 3206165 (1965-09-01), Salmon et al.
patent: 3741520 (1973-06-01), Richmond
patent: 4240610 (1980-12-01), Trimble
patent: 4421298 (1983-12-01), Kujawski
patent: 4872639 (1989-10-01), Gernignani
Sealol Bulletin HP12 "2200 Class Packless Valves", 4 pages Sealol Ball Valves, 6/1961, 1 page.
Eagle Packless Valves, Bulletin 2200, EG&G Sealol Eagle, 12 pages.

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