The working principle of pneumatic plug valve: Pneumatic plug valve is mainly composed of frame, gate plate, screw rod, nut and other parts. By manually rotating the handwheel, the screw rod with screw rod nut and gate plate moves back and forth in the horizontal direction to achieve the purpose of opening and closing the gate.

Technical standard for pneumatic plug valve

1. The shell test and sealing test media for plug-in valves are water (including preservatives), kerosene, or other suitable liquids with a viscosity not greater than water.

2. The sealing pair is a non-metallic sealed plug valve, and the sealing shell test and requirements are in accordance with GB/T13927-92 Class D.

3. The sealing pair is a metal sealed plug valve. For those with sealing performance requirements, the leakage rate of the sealing test is calculated as 1 × DNmm/s. For those without sealing performance requirements, this test is not conducted.

4. The plug-in valve driven by electric, hydraulic, and pneumatic devices should be closed three times after the position is set, and the shell and sealing tests should be conducted according to the requirements of 1 and 3.

5. The cleanliness requirements for plug-in valves shall comply with the provisions of JB/T7748.

6. Static pressure life test.

7. The number of static pressure life tests for plug-in valves shall be in accordance with regulations, while other technologies shall comply with the provisions of JB/Z 234.

Characteristics of Pneumatic Plug in Valve

Pneumatic plug valve is a main control equipment for the flow or conveying volume of powder, crystalline granules, granular materials, and small pieces of materials. It is widely used in industries such as metallurgy, mining, building materials, grain, and chemical industry to control flow changes or quickly cut off.

The advantages of pneumatic plug valve include simple structure, flexible operation, light weight, no jamming, and it is particularly suitable for conveying and flow regulation of various solid materials and block and lump materials with a diameter of about 50mm. Installation is not limited by angle, easy operation, and the scale can be adjusted at any time. The structural characteristics include simple structure, flexible operation, light weight, no jamming, and fast cutting. It is particularly suitable for the transportation and flow adjustment of various viscosity free solids, powders, and particles smaller than 10mm, as well as crystal particles. The installation is not limited by angle, and the operation is convenient. The opening can be adjusted at any time.

Mainly used for warehouse top, bottom, import and export in industries such as building materials, metallurgy, mining, electricity, chemical, glass, light industry, and grain. It is an ideal device for controlling large flow changes, frequent startup, and rapid shutdown.