In addition, for the protection of pneumatic ball valve, a mild operation mode can be selected. Warm water can be used to treat the internal impurities with a certain temperature. These impurities are easier to clean and do not need any materials to rub, which reduces the damage of materials to the protective layer of the inner wall of these equipment. If it is winter, some parts should also be insulated, such as the selection of special insulation cotton, the fireproof characteristics of insulation materials, which can effectively keep the equipment warm and will not affect the subsequent use.

4、 The manufacture and processing of hard sealed ball valves generally require boring machines or CNC machine tools. The sealing surface of the front valve seat and the spherical surface of the device should be matched. The coaxiality of the two holes of the sphere and the tolerance of the size of the sphere's center line relative to the center line of the valve body are relatively strict. Then place the sphere in the closed position, install the left valve body, adjust the gasket, tighten the screws, and fill water under static pressure without leakage. Then the valve can be sealed under the sealing test.