Yuanyuan Factory Pneumatic Butterfly Valve Hardware Accessories Universal Valve Dongyu Environmental Protection Equipment

Pneumatic knife gate valve is a main control device for the flow or conveying volume of powder, crystal, granular, and small materials. It is used in industries such as metallurgy, mining, building materials, grain, chemical, etc. to control flow changes or quickly cut off. The advantages of pneumatic plug valves are simple structure, flexible operation, light weight, no jamming, and are particularly suitable for the transportation and flow regulation of various solid materials and block and ball materials of around 50mm. The installation is not limited by angle, and the operation is convenient. The scale can be adjusted at any time. Structural features: simple structure, flexible operation, light weight, no jamming, fast cutting, especially suitable for various non viscous solids, powders, and less than Φ The conveying and flow adjustment of 10mm granular material, crystal granular material, installation not limited by angle, easy to operate, and the opening can be adjusted at any time. Mainly used for the top, bottom, import and export of warehouses in industries such as building materials, metallurgy, mining, power, chemical, glass, light industry, and grain. It is an ideal device for controlling large flow changes, frequent starts, and quick shutdowns. Operate the slide valve up and down, and the pneumatic knife valve for material syrup. Knife shaped gate valve is a valve that is always in close contact and sealed with the valve seat. Its principle is that there is a circular opening with a diameter on the gate, and the opening and closing of the gate make the circular opening on the gate completely separate and match the diameter. The advantage of this valve is that the valve body diameter has no grooves, the medium will not be blocked, and it has full diameter flow characteristics. Its sealing structure can be divided into soft sealing and hard sealing structures. The penetrating knife gate valve has the characteristics of structure, good processability, and compact structure. The sealing valve seat is designed as a movable structure, with anti wear and automatic compensation functions, resulting in a longer service life. During the process of closing and opening, the valve seat and gate plate continuously move tightly, ensuring stable valve opening and closing force, and having the characteristics of cutting off the medium.

Technical standards:

1. Operate the knife gate valve up and down. The shell and sealing test media for valves with simple structures are water (containing preservatives), kerosene, or other suitable liquids with a viscosity not greater than water.

2. The sealing pair is a non-metallic sealed plug-in 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-in valve. For those with sealing performance requirements, the leakage rate during the sealing test is 1 × DNmm/s calculation, if there are no sealing performance requirements, this test will not be conducted.

4. After adjusting the closing position of the plug-in valve driven by electric, hydraulic, and pneumatic devices, close it three times and conduct shell and sealing tests according to the requirements of 1 and 3.

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

6. Static pressure life test.

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