Usually guiding type explosion-proof solenoid pneumatic valve working principle

explosion-proof normally open solenoid pneumatic valve principle: electricity, electromagnetic force open the pilot hole, the chamber pressure drops rapidly, in closing solenoid pneumatic valve closed form around the high low differential pressure, fluid pressure push close up, pneumatic valve open; Power off, the spring force to close the guide hole, inlet pressure chamber through the bypass hole quickly shut in pneumatic valve using a form around on high pressure difference, fluid pressure push close move down, close the pneumatic valve.
normally open electromagnetic characteristics of pneumatic valve: the upper limit fluid pressure is higher, can be arbitrary installation ( Need to customize but fluid differential pressure conditions must be met.