Schneider Electric 9013GSW2J20 Pressure Switch

Schneider Electric's Square D 9013GSW2J20 is a diaphragm‑operated, electromechanical pressure switch used to automatically start and stop pumps or compressors as system pressure changes. This 9013GSW2J20 variant provides a 20–40 psi operating range with an adjustable differential, enabling precise control of cut‑in and cut‑out pressures. It uses DPST contacts to switch two circuits and is rated for up to 575 VAC and up to 5 HP, making it suitable for mid‑size pump or motor applications such as well pumps, water‑system pressure control, and small compressors. In typical installations, the switch monitors line or tank pressure and actuates a contactor or relay to drive the pump when pressure falls below the setpoint and to stop when the desired pressure is reached, helping maintain target system pressure and prevent short cycling. It is part of Schneider Electric's 9013 family (Pumptrol) of diaphragm‑type pressure switches used in pumping and air‑pressure applications.