Campbell Hausfeld CW2075-30 Pressure Switch Single Port Adjustable Unloader

The Campbell Hausfeld CW2075-30 is a universal, single-port pressure switch with an adjustable unloader valve designed to control start/stop pressure on a wide range of air compressors. It delivers a factory setting of 95 psi cut-in and 125 psi cut-out (adjustable to suit your system), with an open/close range of 140/175 psi and a differential typically around 30–40 psi. The unit’s air supply is 1/4" FPT and the unloader line connects via a 1/4" compression fitting, allowing venting to relieve tank pressure for easier motor start. The switch body is described as a 4-port unit, with electrical inlets on both sides (no bottom electrical inlets), and a built-in unloader valve for releasing air through the unloader line. At approximately 2 lb, it’s a compact replacement that can fit many Campbell Hausfeld and non‑brand compressors that use this style of switch. The CW2075-30 is commonly used as a replacement part to restore proper cycling and unloading behavior in single-stage systems, where precise pressure cycling and reliable unloading are essential for efficient operation.