Control valve having two independently driven valves

Details Control valve having two independently driven valves Control valve having two independently driven valves

1976-07-19

1977-08-16

Nilson, Robert G.

Fluid handling

Systems

Dividing into parallel flow paths with recombining

F16K 1122

Patent

active

040419800

ABSTRACT:
The control valve has a quick-acting main valve and a safety valve which are independently operated either by the working medium which is being controlled or by an auxiliary pressing medium. The safety valve includes a rod which is secured to the piston of the safety valve drive and which extends through the piston of the servo-motor drive of the main valve. This rod has a longitudinal passage which communicates the upper chamber of the servo-motor for the safety valve with a discharge line for venting purposes or with the pressure medium in the upper chamber of the servo-motor of the main valve for closing purposes.

REFERENCES:
patent: 2829670 (1958-04-01), Nix
patent: 3734134 (1973-05-01), Vogeli

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