McDonnell & Miller FS4-3 Switch Refrigerant Using the Belimo ZG-LMSA Shaft

Using the Belimo ZG-LMSA Shaft Extension ensures your installation remains square and true

Its compact profile makes it an ideal fit for smaller OEM boiler cabinets where space is limited

This component is designed for inductive load switching

reducing hysteresis in the control loop

McDonnell & Miller FS4-3 Switch Refrigerant Using the Belimo ZG-LMSA ShaftFor contractors requiring reliable system protection, the McDonnell & Miller FS4 3 (Part Number 114400) is a heavy duty general purpose liquid flow switch designed to monitor flow in heating, cooling, and water process lines. This 1" NPT unit features a single pole, double throw (SPDT) configuration, allowing you to easily integrate signal lights, alarms, motors, or burners into the control circuit. Engineered to operate at a max pressure of 160 PSI