Therma-Feed Boiler Feed System

The Therma-Feed is an economical prefabricated boiler feed system utilizing the direct injection of live steam into the stored water to heat the boiler feed-water to 205-208° F. Heating the water up to these levels effectively drives off up to 90% of excess dissolved oxygen contained in raw water makeup without creating an excessive vent loss. The live steam is admitted to the water through a corrosion resistant perforated diffuser tube. It is controlled by a temperature-pressure regulating valve suitable for use with supply pressures of 6 psig to as high as 250 psig.

This provides greater corrosion allowance and longer service. Each receiver is protected with a baked on epoxy-phenolic lining and a replaceable magnesium anode. A heavy duty welded structural steel stand with integral pump supports is provided to hold the receiver securely. Larger receivers are furnished with a 16″ diameter manhole and other necessary tappings to suit installation requirements. Handholes are installed in all units. Top shell inlet openings are equipped with a dispersion baffle.

Makeup water is admitted to the system through a float operated feeder on all units up to 250 H.P. capacity. A solenoid valve operated by a probe type controller is used on larger systems. All makeup valves are sized to deliver 100% of system capacity rating at a minimum supply pressure of 40 psig at the valve inlet. Boiler feed pumps are heavy duty industrial type designed for low N.P.S.H. service and are driven by standard open drip proof motors unless otherwise specified. Each Sellers Therma-Feed System is shipped completely fabricated on an integral support stand.