Operation Voltage​.

100/110 Volt 50/60Hz
200/220 Volt 50/60Hz
DC 24 Volt 

Operating Principle.

It is divided into upper and lower by main diaphragm.
When electricity is supplied, the coil becomes magnetized.
Pull up the plunger inside the core tube.
Then the compressed air in the upper part falls into the air passage.
As a result, the pressure at the top is lowered.
The compressed air is pulsing,
it pulled up the Main Diaphragm with pressure pushing from the bottom.
When Coil loses electrical power, the plunger closes,
the main diaphragm closes as compressed air is drawn in.