Features and Benefits

For low pressure steam and hot water boilers larger than 5,000 sq. ft. (465m2) with hot or cold water feed Optional Features

No. 2 switch Manual reset 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°F (49°C) Maximum vessel pressure 75 psi (5.3 kg/cm2)