Servocontrolled pressure limiting valve

Details Servocontrolled pressure limiting valve Servocontrolled pressure limiting valve

1983-05-13

1985-07-30

Capossela, Ronald C.

Fluid handling

Line condition change responsive valves

Pilot or servo controlled

137489, F16K 3136

Patent

active

045315400

ABSTRACT:
A pressure limiting valve has two pipe connections connectable to pipes at different pressures and a main piston axially movable in a sleeve in a housing. One end of the piston is closed and the other, free end is attached to an annular piston having two oppositely facing annular surfaces. One annular surface is exposed to the higher pressure through a fluid circuit portion including a changeover valve and the other annular surface is exposed to the pressure at one of the connections. The interior of the main piston is exposed to the lower pressure through a fluid circuit portion including a servocontrol valve. The resulting structure is a double-acting limiting valve having a very low mass piston and high response sensitivity.

REFERENCES:
patent: 2612019 (1952-09-01), Halferd et al.
patent: 3060951 (1962-10-01), Audemar
patent: 3238966 (1966-03-01), Howard et al.
patent: 4000754 (1977-01-01), Risk

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