PRESSURE-BALANCED CONTROL VALVES

摘要

Embodiments of the present disclosure are directed to pressure balanced solenoid control valve for high flow and/or high pressure control applications. An all-sealed integrally formed element functions as both the bellows and spring and is used as a replacement for the combination of both the individual bellows and spring found in existing pressure balanced control valves. The single bellows spring provides a spring force on the movable valve plug and separates opposite sides of the valve plug, wherein a gas passageway is provided between opposite sides of the valve plug so that gas provided at the inlet will flow to opposite sides of the valve plug so as to cancel any pressure forces provided on opposite sides of the valve plug by the pressure of the inlet gas.

主权项

1. A solenoid valve assembly comprising:
an inlet; an outlet; a solenoid coil; a magnetic circuit; a valve seat; a valve plug movable relative to the valve seat in response to an electromagnetic force provided by the solenoid coil and magnetic circuit; a single bellows spring for providing a spring force on the valve plug and separating opposite sides of the valve plug, wherein a gas passageway is provided between opposite sides of the valve plug so that gas provided at the inlet will flow to opposite sides of the valve plug so as to cancel any pressure forces provided on opposite sides of the valve plug by the pressure of the inlet gas.