Bellows seal valve

Details Bellows seal valve Bellows seal valve

1976-10-14

1979-09-04

Cline, William R.

Valves and valve actuation

Hermetic flexible wall seal for actuator

251273, F16K 3100

Patent

active

041666070

ABSTRACT:
An improved bellows valve is disclosed having a relatively long bellows attached at one end to the valve control stem and at its other end to a recessed bellows mounting in the valve bonnet. The recessed attachment permits the use of a relatively long bellows with a valve bonnet of minimal size and mass and permits a wide valve opening with a relatively small valve port. Such a small valve port requires a low closing force for the stem and the use of a wide opening resists clogging. An anti-torque member connected between the valve bonnet and the valve stem prevents stem rotation to isolate the bellows from undesirble rotation during the axial stem and bellows movement.

REFERENCES:
patent: B490589 (1976-02-01), Massey, Jr.
patent: 774985 (1904-11-01), Jones
patent: 1360833 (1920-11-01), Vuilleumier
patent: 1983106 (1934-12-01), Sundstrom
patent: 2317422 (1943-04-01), Thomsen
patent: 2439052 (1948-04-01), McIntosh
patent: 2617621 (1952-11-01), Hobbs
patent: 2628638 (1953-02-01), Herod et al.

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