51 MECHANICAL WATER FEEDER TTD • Single non-adjustable port

• Single non-adjustable port

Hoffman Vacuum Breaker Data Sheet

Electric Water Feeders

McDonnell & Miller Water Feeder Data Sheet

“Slow opening” prevents sudden pressure surge and instrument damage

51 MECHANICAL WATER FEEDER TTD • Single non-adjustable portWater Feeders Mechanical 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. (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.