For the powder system of pneumatic butterfly valve, other requirements should be taken into consideration, such as: materials should not be directly rushed to the valve plate when they are put into the trolley from above (this impact force will also make the valve not close tightly), and the static pressure of materials should not exceed the specified bearing pressure of pneumatic butterfly valve, etc. 　　

First, it is mainly composed of pneumatic control valve, solenoid valve, positioner, one-way valve, etc. The working principle is that when the air source of the control system fails, the retaining valve will automatically open, and the control air source of the solenoid valve will be canceled, and the slide valve of the solenoid valve will be reset under the action of the spring, and one of the two solenoid valves will exhaust, and the other will supply air, and the one-way valve will be closed. The air source will supply air to the valve because of the air source stored in the air tank, Finally, the valve can be fully closed or opened. The conversion between them will be realized by adjusting the connection mode of the pneumatic directional valve.