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