the internal disc is likely defective and requires replacement

Industrial Durability: Rated for a minimum of 100

which prevents rapid cycling and protects the heater elements from premature fatigue

you must verify the sequencer and breaker sizing to ensure the system can handle the specific amperage requirements of this 4

ensuring precise synchronization between branch pressure and mechanical heating or cooling stages

McDonnell & Miller FS7-4J Switch Els PW 29614 the internal disc is likelyThe McDonnell & Miller FS7 4J (Part Number 120060) is a heavy duty industrial liquid flow switch designed for high demand applications including secondary filtration, hydronic heating, and process cooling. This model features a 1 1 4" BSPT connection and is equipped with a single pole, double throw (SPDT) snap switch, allowing for simultaneous make and break circuit control. Built for durability, it utilizes brass construction and a magnetic switching