Bellows sealed plug valve

Details Bellows sealed plug valve Bellows sealed plug valve

1989-09-29

1990-09-11

Walton, George L.

Valves and valve actuation

Mechanical movement actuator

Particularly packed or sealed

251229, 251250, 251278, 251315, 2513353, F16K 4110, F16K 3150, F16K 3154

Patent

active

049555812

ABSTRACT:
A bellows sealed plug valve includes a valve body having an inlet passage and an outlet passage, a valve chamber between the inlet and outlet passages. A valve plug has substantially the same shape as the valve chamber and is rotatably disposed therein. A shaft is movable linearly in response to a signal from a valve actuator. A bellows is sealingly disposed between the valve chamber and the valve actuator and means are located between the bellows and the valve plug for converting linear movement of the shaft connected to the valve actuator to rotational movement of the plug. Various means are disclosed including helical thread mechanism, clevis mechanism and rack and pinion mechanism, all for converting linear motion to rotational motion.

REFERENCES:
patent: 1381873 (1921-06-01), Hardy
patent: 2308183 (1943-01-01), Lewis et al.
patent: 2662722 (1953-12-01), Graziano
patent: 2744720 (1956-05-01), Wilms
patent: 2993504 (1961-07-01), Sizer
patent: 3096966 (1963-07-01), McFarland, Jr.
patent: 3784156 (1974-01-01), Paetzel et al.
patent: 4231545 (1980-11-01), Nelimarkka
patent: 4270727 (1981-06-01), Norman
patent: 4462422 (1984-07-01), Owoc et al.
patent: 4688601 (1987-08-01), Astill

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