Flange ball valve sealing surface is metal surfacing

Precautions for storage and maintenance of flange ball valve
    Flange ball valves should be protected from rain, water and moisture, and the flange cover should be tightly closed. Valves stored for more than 12 months should be retested to ensure stable performance. If there is a slight leak in the packing during use, you can slightly tighten the stem nut until the leak stops. Do not continue tightening. Generally, the flange ball valve uses PTFE as the sealing material, and the sealing surface of the flange ball valve is made of metal. If the pipe ball valve needs to be cleaned, care should be taken to prevent damage to the seal ring and leak during disassembly.
Flanged ball valve
    When cleaning the flange ball valve, thoroughly clean the residual dust, oil and other attachments. If it can't be cleaned with clean water, it can be used with detergents such as alcohol without damaging the valve body and parts. Cleaning. After the flange ball valve is cleaned, the cleaning product is completely volatilized before assembly. Some of the media remains in the flange ball valve body and is also subjected to a certain pressure. Before servicing the ball valve, first close the shut-off valve before the ball valve, open the ball valve that needs to be repaired, and completely release the internal pressure of the flange ball valve body.