McDonnell & Miller Series 47 Mechanical Water Feeder/Low Water Cut-off 47-2, #2 Switch

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 Series 47 F – 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/cm2) . Maximum inlet water temperature 120°F (49°C). Maximum boiler pressure 25 psi (1. 8 kg/cm2). Made in the USA.