Hayward Solenoid is a direct acting

Hayward Solenoid is a direct acting actuated solenoid

Hayward Solenoid is a direct acting actuated solenoid. When the solenoid coil is energized, a magnetic field is created which generates an upward pulling force on the valve piston, causing it to open. When the coil is de-energized (electrical power shut-off) both the piston spring and the force of inlet pressure an piston seal close

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