The three major categories of solenoid pneumatic valve is how to work?

solenoid pneumatic valve is used to control the fluid automation components, belonging to the actuator, is relying on the power supply coil electromagnetic force produced by the driver activity pneumatic valve opening and closing of the valve core, is to use electromagnetic control of industrial equipment, in the industrial control system, is used to adjust the direction of the medium, flow, velocity and other parameters. In principle can be divided into three categories, Straight moving type, distribution of moving type, guiding type) 。

a, straight with solenoid pneumatic valve lift water:

principle: electricity, electromagnetic coil to produce electromagnetic force to shut off pneumatic seat, pneumatic valve open; Power, the electromagnetic force disappears, press on the pneumatic valve seat, spring to close the pneumatic valve is closed.

features: in a vacuum and negative pressure, can work properly when the zero pressure, but size is generally not more than the mm.

second, the distribution type of moving water with solenoid pneumatic valve:

principle: it is a direct acting and pilot operated the principle of combining, when the inlet and outlet no pressure difference, after electrify, electromagnetic force the lead directly to the small pneumatic valve and main valve closed, in turn, lift, pneumatic valve to open. When the inlet and outlet at startup pressure difference, after electrify, forerunner of the electromagnetic force small pneumatic valve, the main pneumatic valve inferior vena pressure rising, the cavity pressure drop, which using the differential the main pneumatic valve opened up; Power outages, the forerunner of pneumatic valve using the spring force or medium pressure push off, move down, to close the pneumatic valve.

features: high fluid pressure range limit, can install any custom but must meet the fluid differential pressure conditions needed

3 with solenoid pneumatic valve, pilot operated water:

principle: electricity, electromagnetic force open the pilot hole, the chamber pressure drops rapidly, in 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.