LOW LEAKAGE SOLENOID VALVE

摘要

A normally closed high pressure solenoid valve structure including a plunger pin spring-urged against a composite valve seat having a steel reinforcing ring which surrounds and contains any radial movement of a seat member of elastic material softer than the plunger pin which provides a very low leakage level across the valve from either direction and a lost-motion connection between the plunger pin and the solenoid armature so that the spring load on the plunger pin is retained even with cold flow of the seating material during cycling.