Flow control valve

Details Flow control valve Flow control valve

1984-07-26

1986-06-24

Cohan, Alan

Fluid handling

Pressure modulating relays or followers

With counter-balancing pressure feedback to the modulating...

1371165, G05D 1600

Patent

active

045962642

ABSTRACT:
A fluid flow pressure control valve includes a valve body having a chamber divided by a dashpot plate into an inlet chamber and a dampened flow region chamber. A diaphragm senses the fluid pressure forces in the chamber with an adjustable spring force acting to balance the fluid pressure forces exerted on the other side of the diaphragm. By varying the spring force with a follower piece, which moves axially along a stationary threaded shaft, the amount of fluid pressure necessary to balance the spring force can be selectively varied. The follower can be blocked from travel beyond selected locations by stops positioned on the valve housing and thus a plurality of desired pressure values can be reliably chosen. Fluid flow induced oscillations of the compact, easily installed valve are attenuated by a dashpot means which includes the dashpot plate with an aperture therethrough providing communication between the inlet chamber and the dampened flow region chamber.

REFERENCES:
patent: 1881367 (1932-10-01), McKesson
patent: 2659381 (1953-11-01), Seljos
patent: 2984252 (1961-05-01), Bryant
patent: 4111222 (1978-09-01), Hassell
patent: 4438662 (1984-03-01), Walton

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