Differential pressure control valve

摘要

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 (VS) into its inoperative position against a first seat ring (60). In moving toward the valve seat (VS) 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.