Ball valve plastic caps are used for high, medium, and low-pressure gate valves, stop valves, ball valves, butterfly valves, check valves, needle valves, process valves, drain valves, pressure reducing valves, regulating valves, and various other valve products. The valve body materials include cast iron, cast iron, stainless steel CF8, CF8M, CF3, CF3M, high-temperature steel, molybdenum steel, low-temperature steel, and various special materials. The transmission methods include manual, bevel gear, electric, pneumatic, electro-hydraulic interlock, and gas-liquid interlock for opening and closing.