Supco SHP400300 Pressure Switch R-407C With a fixed cut-in temperature

With a fixed cut-in temperature of 37°F and an adjustable cut-out range

you bypass the calibration issues common with standard altitude boards

the 3/4" NPT threaded connection and 4-3/4" copper float ensure long-term reliability in commercial and industrial steam boiler applications where accurate water inventory is critical for pump protection and system stability

It is not designed to regulate system pressure during standard operation and should only activate when system limits are exceeded

Supco SHP400300 Pressure Switch R-407C With a fixed cut-in temperatureThe Supco SHP400300 High Pressure Switch is the direct engineering update for the legacy 5680 pressure switch, providing reliable system protection for HVACR refrigeration units. Built as an encapsulated, non adjustable pressure control, this SPST switch features a 400 PSI cut out (Open) and a 300 PSI cut in (Close) to prevent compressor damage during high side pressure spikes. Designed for direct mounting, it includes a 1 4" SAE female flare fitting