Mcdonnell & Miller 47, Mechanical Water Feeder

Series 47/47-2 Mechanical Water Feeders/Low Water Cut-Offs For steam and hot water boilers with cold water feed Continuous maintenance of minimum safe water level, independent of electrical service Proportional feed action Quick hook-up fittings provided Quick-change replaceable cartridge valve and strainer Optional features - No. 2 switch - Manual reset Model 47 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/cm sq.) Maximum inlet water temperature 120 degrees F (49 degrees C) Maximum boiler pressure 25 psi (1.8 kg/cm sq.)