Description
The Schneider Electric (Square D) 9013FHG9J43 Pressure Switch displays a system pressure within a 60-80 PSI operating range that opens or closes in electrical contact in response to pressure changes at the sensing port. Its factory-set differential maintains a defined gap between cut-in and cut-out pressure points, providing stable contact switching without rapid cycling under minor pressure fluctuation. Pumping systems and pressurized water circuits in HVAC systems use this switch to automate pump start and stop sequences, maintaining consistent system pressure across hydronic and chilled water distribution loops.
