Mcdonnell & Miller 51, Mechanical Water Feeder

**Note:** Image may not be exact representation of item. 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. (465m sq.) 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 lg/cm sq.) Maximum inlet water temperature 120 degrees F (49 degrees C) Maximum vessel pressure 35 psi (2.5 kg/cm sq.)