Air compressors are divided into reciprocating compressors and screw compressors according to their working principles. The accessories of air compressors mainly include some conventional vulnerable parts. The accessories of screw compressors are divided into vulnerable parts, such as temperature sensors, pressure sensors, computer boards, relay boards, PLC controllers, control panels, operation panels, solenoid valves, rotary valves, pneumatic valves, blow-off valves, temperature control valves, thermal control valves, temperature control valve cores, proportional valves, capacity control valves, pressure maintenance valves, inlet valves, safety valves, regulating valves, switches, ducts, starter plate buffers, and so on. Unlike reciprocating compressors, screw compressors operate differently and have different designs. Vulnerable parts of screw compressors include oil filters, air filters, oil-gas separators, machine oils, and so on.