For commercial and industrial low or high pressure boiler applications Specifications For boilers of any steaming capacity Monel bellows provides corrosion resistance Snap action switches for high temperature service 1 Single pole, single throw switch for pump control 1 Single pole, double throw switch for low water cut-off and alarm actuation Maximum pressure 150 psi (10.5 kg/cm2) Model 150S.. The 150S-HD (173003) is a low water cut-off & pump control head mechanism with snap acting SPDT switch. For boiler applications up to 150 PSI.
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McDonnell & Miller 172806 model 150S-M replacement low water cut-off & pump controller with snap-action switch assembly with manual reset for commercial and industrial low or high-pressure steam boiler applications. This float-type, combination low water cut-off and pump controller has 1" NPT connections and a maximum pressure of 150 psi.. Boiler Controls Low Water Cut-Offs — For Steam Boilers Series 150S Mechanical Series 150S McDonnell & Miller JI CHICAGO usA CUT-OFF LEVEL CUT-OFF LEVEL Low Water Cut-Off/Pump Controllers For commercial and industrial low or high pressure boiler applications For boilers of any steaming capacity Monel bellows provides corrosion resistance Snap action switches for high temperature service 1.