3 Scope of application Double eccentric semi pneumatic ball valve is suitable for valves required by various general industries, such as water, sewage, waste water, steam, gas, pulp and other media. If the sealing pair is made of Cr Mn Si hard alloy and has fire resistance, explosion-proof and anti-static functions, it is suitable for medium and high temperature media requirements, such as gas, coke oven gas, water gas and natural gas. If the sealing pair (hemispherical body, valve seat) and valve body passage are treated by tungsten carbide special process, it has the advantages of high efficiency, energy saving, good wear resistance, reliable sealing performance, easy operation, rapid opening and closing, and long service life. It is an ideal choice for valves used in industrial silicon industry pipelines. Because of its instantaneous separation and compaction characteristics between the hemispherical body and the valve seat, it is suitable for the harsh working conditions with particles in the medium, and can be widely used in various pipeline control in the blast furnace pulverized coal injection, pulverizing system and dust removal system in metallurgy, mineral processing, power and other production processes. In the process of instant separation and instant compression, the hemispherical body and the valve seat can squeeze and cut to remove the scale and adhesion on the sealing surface, which can ensure tight and reliable sealing. It is the ideal choice of valves for two-phase mixed fluid medium in the process flow of transporting solution slurry, slurry ash and slag that are easy to precipitate and scale, and crystallize.

1、 Confirm the preparation before installation of pneumatic ball valve: ensure that the installation position of pneumatic ball valve is on the same axis, the two flanges on the pipeline should be kept parallel, and confirm that the pipeline can bear the weight of the ball valve itself. If it is found that the pipeline cannot bear the weight of the ball valve, provide corresponding support for the pipeline before installation
Confirm whether there are impurities, welding slag, etc. in the pipeline, and purge the pipeline.
Check the nameplate of the pneumatic ball valve, operate the pneumatic ball valve fully open and fully closed for several times, confirm that the valve can work normally, and then check all details of the valve comprehensively to ensure that the valve is intact.
Remove the protective covers at both ends of the pneumatic valve, check whether the inside of the valve body is clean, and clean the inner cavity of the valve body. Since the sealing surface of the pneumatic valve is spherical, even small sundries may cause damage to the sealing surface.