150SHD HEAD MECHANISM FOR 150 SERIES

McDonnell & Miller 173003 150S-HD Auto Reset Snap Switch Head Mechanism For 150 And 157 Series Low Water Cut Offs Series 150S Low Water Cut-Off/Pump Controllers - Model # 150S-HD - The (S) in model # indicates snap switch - • 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) Replaces McDonnell Miller 150-HD, 150HD, 150E-HD, 150EHD McDonnell & Miller 173003 model 150S-HD replacement head mechanism with snap-action switch assembly repairs Series 150S and Series 157S low water cut-off pump controllers for steam boilers. Replacement head mechanisms can be installed without disturbing existing equalizing connections or disassembly of components, making repair simple and easy.