Four-way plug valve

Details Four-way plug valve Four-way plug valve

1979-04-18

1981-09-01

Rosenthal, Arnold

Fluid handling

Systems

Multi-way valve unit

1374938, 251 56, 251175, 251192, 251285, 251287, F16K 516, F16K 11083, F16K 3906

Patent

active

042866251

ABSTRACT:
A rotary lift-turn type plug valve mechanism includes a valve body and bonnet structure defining a tapered valve chamber that receives a tapered plug member which is operated by linear and rotary components of movement to achieve valve operation. Externally adjustable plug positioning means is provided by the valve mechanism to enable the position of the plug element to be adjusted relative to the inlet and outlet flow passages defined by the valve body. Plug dampening means is also provided for applying a dampening force to the plug element to prevent slamming of the plug upon reaching the end of a rotational component of movement. A valve actuator is also provided that operatively engages the valve stem of the plug and is capable of imparting both linear and rotary components of movement to the valve stem for unseating, rotating and reseating the valve element within the valve chamber. A system is provided for maintenance of predetermined pressure differential across the sealing elements of the valve and to compensate for volumetric changes as the valve element is seated and unseated.

REFERENCES:
patent: 2054259 (1936-09-01), Kinzie
patent: 2085688 (1937-06-01), Schuchman et al.
patent: 2149725 (1936-03-01), Canariis
patent: 2493966 (1950-01-01), Hartley
patent: 2703586 (1955-03-01), Asker
patent: 3353785 (1967-11-01), Eggers

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