(2) Installation process
① Install the valve into the pipeline. Any end of the valve shall be installed at the swimming end h. The valve for handle drive can be installed at any position on the pipeline. However, the manual pneumatic ball valve with gearbox and the pneumatic pneumatic ball valve with pneumatic driver are installed vertically, that is, they are installed on the horizontal pipeline, and the driving device is above the pipeline.
② The sealing gasket shall be installed on the connecting pipe shoe between the valve flange and the pipeline flange according to the design requirements.
③ The bolts on the flange shall be symmetrically tightened one by one and evenly.
④ Connect the pneumatic pipeline when using pneumatic actuator).

Application scope and type characteristics of non-metallic contraction joints
1. Boiler factory;
2. Cement plant;
3. Iron and steel plants, smelting furnaces and combustion furnaces;
4. Thermal power plants and nuclear power plants;
5. Air conditioning air supply system;
6. Glass and mineral wool industry;
7. Petrochemical enterprises;
The original materials of non-metallic contraction joints are fiber fabrics and thermal insulation cotton, which have the functions of sound absorption and vibration isolation, and can effectively reduce the noise and vibration of boiler, fan and other systems. Since the main materials are fiber fabrics, weak communication, non-metallic contraction joints can simplify the design. The applied fluoroplastics and organosilicon materials have good performance of high temperature resistance and corrosion resistance. Under the action of various media, they have good sealing performance. When using this type of contraction joint, the device maintenance is extremely easy.