Working principle of the pulse electromagnetic pneumatic valve is what

the working principle of the pneumatic valve solenoid pneumatic valve has closed cavity, in the different position of the open hole, each hole leads to different tubing, cavity pneumatic valve is among, both sides are two electromagnets, which face the magnet coil electricity pneumatic valve will be attracted to which side, by controlling the movement of the pneumatic valve body to blocked or leakage of different discharge of oil hole, and the oil hole is always open, hydraulic fluid will enter the different oil drain, and then through the oil pressure to push oil just the pistons, piston drives the piston rod, piston rod drive mechanism. So that by controlling the electric current of the electromagnet to control the mechanical movement.
said above is the general principle of electromagnetic pneumatic valve, in fact, according to the flow of medium temperature, pressure, etc. , such as the pipeline pressure and their status without pressure. The working principle of electromagnetic pneumatic valve is different. For example in artesian condition need to zero pressure startup, is after electrify, the brake coil whole body sucked up. Pneumatic valve, pressure state of the electromagnetic coil is sucked out after the power supply plug in a pin on the lock body, with the top of the lock body and the pressure of fluid itself.
the difference between these two approaches is that their state of solenoid pneumatic valve, because the coil to suck up the lock body, so the volume is larger and the electromagnetic air valve with the pressure, only need to suck up the pin, so the relatively small volume can be done.