STC 2P250-1-4-D-E 1" NPT Solenoid Valve 2 Way Normally Closed Direct Acting/Lift Plastic 220VAC DIN with EPDM Seal

1" NPT 2 Way Normally Closed Direct Acting/Lift Plastic Solenoid Valve (220VAC, 2WO250C DIN Coil) with EPDM Seal

This valve is a two-way, normally closed, direct lift, zero differential solenoid valve. When the valve receives an electrical signal, a magnetic field is formed which attracts the plunger covering the main orifice to lift off, causing system pressure to drop. As system pressure on the top of the diaphragm is reduced, full system pressure on the other side of the diaphragm acts to lift the diaphragm away from the main orifice, which allows media to flow through the valve. Since the bleed orifice is dimensionally smaller than the pilot orifice, the system pressure cannot rebuild on the top of the diaphragm as long as the pilot orifice remains open.

When the valve is de-energized, it releases its hold on the plunger. Then the plunger forced by the spring drops and covers the main orifice. The system pressure builds up on the top of the diaphragm through the bleed orifice, forcing the diaphragm down until it covers the main orifice and stops media flow through the valve.

For more information, please see Data Sheet