The operation of Cast Iron Boiler Feed Pumps is controlled by the water level control device. It is part of the boiler control package. When the boiler requires water, the pump switches on. This pumps water from the receiver into the boiler.
- Cast Iron Boiler Feed Pumps are controlled by the water level control system on the boiler. When the boiler requires water, the pump switches on. Then it pumps water from the receiver into the boiler.
- The receiver tank also contains an internal make-up water valve. This is actuated by a stainless steel float. The float is used if the amount of condensate being returned to the receiver tank is inadequate.
- An Electric Alternator is required to cycle operation between the two pumps on Duplex models.
- The capacity of the boiler feed pump in Gallons Per Minute (GPM) is based on the Boiler horsepower (hp).
For Example: A 15 hp boiler will produce up to 500 lbs/hr of steam when running at maximum load. That translates to requiring 1.0 GPM of water make-up to the boiler. Using a 3:1 safety factor would require a 3.0 GPM Boiler Feed pump.
- Select a discharge pressure for the pump. You need it to overcome boiler pressure and all system back pressure. This includes frictional piping losses. Pump discharge pressures of 20-50 PSI are available.
Options for Cast Iron Boiler Feed Pumps:
- Mechanical and Electrical Alternators
- Gauge Glass
- Discharge Pressure Gauges
- Isolation valves
- Magnetic Starters with HOA Selector Switch
- 1750 RPM Motors
- Larger pumping capacities & higher discharge pressures
- Wide variety of control panels
- Oversized Receivers (45, 60 & 95 gallons)
- High Temperature (250°F) Components