Industrial CW218100AV Pressure Switch 90 Degree Unloader

The CW218100AV is a Campbell Hausfeld pressure switch with a 90-degree unloader valve, engineered for use with Campbell Hausfeld air compressors. It governs the compressor motor’s on/off cycle and, when the switch opens, vents residual air through the unloader path to relieve head pressure, which helps the motor start more smoothly and reduces starting current. Campbell Hausfeld manuals group CW218100AV with related CW2181x switches and note installation accessories such as a 90-degree elbow fitting and an unloader tube kit, confirming the model’s configuration and required accessories. This unit is designed as a direct replacement part for portable and stationary Campbell Hausfeld compressors that use this control assembly, allowing you to restore proper cycling without modifying the pump system. Installers should follow standard safety procedures and Campbell Hausfeld installation guidance to ensure correct wiring and tubing connections.