Variable stage direct field boiler

Details Variable stage direct field boiler Variable stage direct field boiler

1982-02-08

1984-07-31

Yuen, Henry C.

Liquid heaters and vaporizers

Automatic control of fluid fuel and water

Once through

122438, 122 39, 122 41, F22B 118, F02C 700

Patent

active

044623429

ABSTRACT:
A variable stage direct fired boiler having at least three output-pressure sensitive combustion stages. A separate pressure switch controls each stage such that none, one or more stages may be engaged in combustion depending upon the desired output pressure and the actual output pressure.

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