Compressor

About

Compressor parts keep air pressure controlled, leaks contained, and pneumatic tools supplied with reliable airflow. A compressor may be portable or stationary, oil-free or oil-lubricated, direct-drive or belt-driven. Common replacement parts include pressure switches, check valves, safety relief valves, regulators, gauges, drain valves, air filters, pumps, pistons, rings, reed valves, belts, motors, capacitors, hoses, couplers, wheels, feet, handles, gaskets, and tank fittings. GenuineReplacementParts.com helps customers shop compressor parts by model number, pressure rating, symptom, and part function. An air compressor works by drawing air into a pump, compressing it, storing it in a tank, and sending regulated pressure to a tool or hose. The pressure switch turns the motor on and off at set cut-in and cut-out pressures. The check valve allows air into the tank and prevents it from flowing back into the pump. The unloader valve releases trapped pressure from the pump head so the motor can restart more easily. The regulator controls outlet pressure, while gauges show tank and line pressure. Customers often ask whether a leaking pressure switch always means the pressure switch is bad. Not always. If air leaks from the unloader line or pressure switch area after the compressor shuts off, a leaking tank check valve can allow air to flow backward from the tank. In that case, replacing only the pressure switch may not solve the leak. The exact symptom and leak location matter. Common compressor symptoms point to different parts. A compressor that will not restart and hums may be fighting backpressure from a bad check valve or unloader issue. A compressor that never reaches pressure may have worn rings, a damaged reed valve, a leaking gasket, a stuck drain valve, or hose leaks. A compressor that will not shut off may have a pressure switch issue, leak, pump problem, or incorrect pressure setting. A compressor that leaks at the tank drain may simply need a drain valve. Sa