Manufacturers of gate valves will discuss them from structure to principle and usage scope. Pneumatic gate valves are the main control equipment for the flow or conveying volume of powders, granular materials, particle materials, and small pieces, widely used in industries such as metallurgy, mining, building materials, grain, and chemicals for controlling flow changes or quick cut-offs. The working principle of pneumatic gate valves: They are mainly composed of components such as frames, gates, screws, nuts, etc., powered by compressed air. The direction of the air path is changed by the solenoid valve, which drives the cylinder piston, moving the gate back and forth horizontally to achieve the opening and closing of the gate.