172810 Model 150S-M-MD-HD McDonnell & Miller Head Mechanism

172810 (previously 173302) Series 150S 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 Single pole, single throw switch for pump control 1 Single pole, double throw switch for low water cut-off and alarm actuation Optional features Manual reset 2 Single pole, single throw switches 2 Single pole, double throw switches Float block BSPT threads Maximum pressure 150 psi (10.5 kg/cm2 )