Mcdonnell & Miller 53-B, Mechanical Water Feeder w/ Float Block

**Note:** Image may not be exact representation of item. For low pressure steam and hot water boilers larger than 5,000 sq. ft. (465m2) with hot or cold water feed Product Specifications Float block Proportional feed action Model 53 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 Deg. F (49 Deg. C) Maximum vessel pressure 75 psi (5.3 kg/cm2)