McDonnell & Miller 94-M Pump Controller R-22 Advanced Thermal Material: Constructed from

Advanced Thermal Material: Constructed from premium silicon carbide to withstand intense thermal shock and maintain structural integrity over thousands of ignition cycles

If the motor is running and the venting is clear

Scroll compression design for smooth and reliable operation

ensuring consistent thermal cycling without the modulation lag found in standard throttling valves

McDonnell & Miller 94-M Pump Controller R-22 Advanced Thermal Material: Constructed fromThe McDonnell & Miller 94 M is proof of heavy duty reliability for high pressure steam applications, serving as a robust combination low water cut off and pump controller. Designed specifically for steam boilers with a maximum pressure of 250 psi, this unit utilizes manual reset SPDT switches to ensure precise water level management and failsafe protection. The dual snap acting switches prevent rapid cycling, reducing mechanical wear on your pump