McDonnell & Miller 150S-MD-HD Controller 30067439-890 this model is a (NoPP)

this model is a (NoPP) variant

Designed with a stainless steel outer jacket

ensuring the root cause of the overheat is addressed before the system resumes operation

it provides reliable cycling for ventilation fans

and cooling water conservation in restricted areas

McDonnell & Miller 150S-MD-HD Controller 30067439-890 this model is a (NoPP)The McDonnell & Miller 150S MD HD (Part Number 173103) is a high performance combination low water cut off and pump controller head mechanism designed for demanding commercial and industrial steam boiler applications. This specific model features maximum differential operation, a critical function that prevents nuisance burner shutdowns in systems with fluctuating water levels or low pressure environments. By providing a wider 7 8 inch differential