McDonnell & Miller Series 51 Mechanical Water Feeder/Low Water Cut-off

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). Made in the USA.