173502 Model 157S McDonnell & Miller Hi Pressure Level Control

Catalog Page Installation Guide The McDonnell & Miller #157S HI Pressure LEVEL Control Features and Benefits 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) Model 150S-MD Maximum differential operation – Prevents nuisance burner shutdowns in low pressure applications