172809 Model 150S-M-HD McDonnell & Miller Head Mechanism

Datasheet 172809 (previously 173203) Combination Low Water Cut-Off and Pump Controller with Snap Acting Manual Reset SPDT Switch Head Mechanism Only (Part Number 173203) PRODUCT FEATURES 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 For commercial and industrial low or high pressure boiler applications and boilers of any steaming capacity. 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) Model 150S-MD Maximum differential operation – Prevents nuisance burner shutdowns in low pressure applications