UW Series 1'' Inch UW-25 2W250-25 Direct Acting Solenoid Valve

UW Series 1'' Inch UW-25 2W250-25 Direct Acting Solenoid Valve

Technical Data of 2W & 2S Solenoid Valve:

Main dimension of 2W & 2S Series Solenoid Valves:

2/2 Pilot Operated Diaphragm Solenoid Valve : Normally Closed

To open:
when the valve receives an electrical signal, a magnetic field is formed which attracts the plunger covering the pilot orifice to lift off, causing system pressure (holding the diaphragm/piston closed) to drop.

As system pressure on the top of the diaphragm/piston is reduced, full system pressure on the other side of the diaphragm/piston acts to lift the diaphragm/piston away from the main orifice, which allows media flow through the valve.

Since the bleed orifice is dimensionally smaller than the pilot orifice, the system pressure can t rebuild on the top of the diaphragm/piston as long as the pilot orifice remains open.

Pilot Operated Diaphragm Solenoid Valve Symbol

To close:
when the valve is de-energized, it releases its hold on the plunger. Then the plunger drops and covers the main orifice. 
The system pressure builds up on the top of the diaphragm/piston through the bleed orifice, forcing the diaphragm/piston down until it covers the main orifice and stops media flow through the valve

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