Pressure regulator and flow control valve with pre-exhaust vent

Fluid handling – Convertible – Unit orientable in a single location between plural positions

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Details

91443, 13750518, 137599, F15B 1104, F15B 13042, F16K 1718

Patent

active

041978749

ABSTRACT:
A combination pressure regulating and flow control valve having a first fluid passage interconnecting an upstream port and a downstream port. An adjustable pressure regulating valve is mounted in the first fluid passage to provide a reduced pressure at the downstream port. An adjustable flow control valve is mounted in said first fluid passage for selective provision of either a meter in or meter out action on fluid flowing through said first fluid passage. In parallel with said flow control valve is a spring biased check valve for selective provision of free flow in a direction opposite to the metering action of the flow control valve. A parallel second fluid passage in the valve interconnects the upstream port with the downstream port. Mounted in the second fluid passage is an adjustable, spring loaded pre-exhaust valve which is vented to the upstream port. When a meter out flow takes place from the downstream port through said first fluid passage to the upstream port the pre-exhaust valve is set to allow flow through the parallel second fluid passage until a pre-set pressure at the downstream port is reached and then it closes against flow.

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patent: 3951162 (1976-04-01), Wilke

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