McDonnell & Miller 193-A Controller 30067439-890 Professionals rely on its ANSI

Professionals rely on its ANSI Z21

The assembly features a 42-inch capillary and a 3/16" x 15-3/8" bulb

ensuring positive power interruption the moment internal temperatures exceed safe operating parameters

this OEM component ensures seamless HVACR system compatibility when interfacing between thermostat controllers and high-load mechanical parts

or data logger that accepts a 4-20mA current loop signal

McDonnell & Miller 193-A Controller 30067439-890 Professionals rely on its ANSIThe McDonnell & Miller 193 A is a heavy duty combination low water cut off and pump controller engineered for commercial steam boiler applications. Designed for boilers with a maximum pressure of 150 PSI, this unit features dual snap acting SPDT switches for precise burner control and pump activation. The 193 A model utilizes alternate tappings to simplify installation on various boiler configurations. Its rugged float operated mechanism ensures