MCDONNELL & MILLER LOW WATER CUT OFF & FEEDER 51-2

McDonnell Miller 51-2 Mechanical Water Feeder and Low Water Cut Off With # 2 Switch - Model # 51-2 - Used with Hot Water Boiler & Steam Boilers - 1" Connection Size - 120V/240V - Control Reset Automatic - Control Switch # 2 - Maximum Water Pressure 150 PSI - Maximum Water Temperature 120 F - Weight 35.8 LBS Electrical Ratings (ALR): 30.6 @ 240 VAC 61.2 @ 120 Vac Series 51/51-2 Mechanical Water Feeders/Low Water Cut-Offs • For low pressure steam and hot water boilers larger than 5,000 sq. ft. (465m2) capacity with cold water feed • Quick-change replaceable cartridge valve and strainer • Optional features – No. 2 switch – Manual reset – Float block • Proportional feed action • Model 51 can be field upgraded with a No. 2 switch to add low water cut-off function • Maximum water supply pressure 150 psi (10.5 kg/cm2) • Maximum inlet water temperature 120˚F (49˚C) • Maximum vessel pressure 35 psi (2.5 kg/cm2) McDonnell & Miller model number 51-2 is a combination float-operated make-up water feeder and low water cut-off for low pressure steam or hot water boilers with a capacity larger than 5,000 square feet with a tapped 1" FIP connection. This unit features an automatic reset, a 120 volt number 2 cut-off switch, and continuous maintenance of minimum safe water level independent of electrical service. Its maximum water pressure is 150 psi and steam pressure is 35 psi. McDonnell Miller 51-2 Mechanical Water Feeder and Low Water Cut Off With # 2 Switch Features For low pressure steam and hot water boilers larger than 5,000 sq. ft. (465m2) capacity with cold water feed Quick-change replaceable cartridge valve and strainer Proportional feed action Maximum water supply pressure 150 psi (10.5 kg/cm2) Maximum inlet water temperature 120˚F (49˚C) Maximum vessel pressure 35 psi (2.5 kg/cm2) Mechanical Water Feeder and Low Water Cut Off for Low Pressure Steam and Hot Water Boilers with 35 PSI Max Vessel Pressure, 1" NPT Connections, and Snap Acting SPDT Switch (Part Number 135000)