The normally closed valve opens when energized and closes when de-energized. When the coil is energized the pilot valve opens, relieving the pressure above the piston, which is then lifted from its seat by the inlet pressure. Upon de-energizing the coil, a spring closes the pilot valve and pressure builds above the piston to seat it. The normally open valve operates similarly, closing when energized and opening when de-energized.
To control the flow of High Pressure Air, Water, Natural Gas, Hydrogen, Nitrogen and other gases or light liquids compatible with materials of construction. Valve must be mounted with solenoid vertical and on top.