Differential pressure control valve

Details Differential pressure control valve Differential pressure control valve

1990-12-27

1991-11-26

Nilson, Robert G.

Fluid handling

Systems

Sequentially closing and opening alternately seating flow...

F16K 3110

Patent

active

050675249

ABSTRACT:
A differential pressure control valve comprises a plunger (36) which is displaceable in a housing (30) by an electromagnet (32). By way of a stop (52) a first spring (44) presses the valve seat (V.sub.S) into its inoperative position against a first seat ring (60). In moving toward the valve seat (V.sub.S) the plunger (36) is cushioned by a second spring (42) before or as it touches the valve seat. Very sensitive actuation of the valve is obtained by the fact that the first spring exerts somewhat greater pressure than the second one.

REFERENCES:
patent: 4565209 (1986-01-01), Ruchser
patent: 4979537 (1990-12-01), Offenwanger

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