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The sealing by plastic refractory between a boiler shell or head and the firebrick wall; used to prevent hot gases from contacting the boiler above the lowest waterline.
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Related Terms |
BOILER OPERATING PRESSURE
Depending upon the design of the boiler, the constant pressure maintained at the steam drum or the superheater outlet. |
BOILER FULL POWER CAPACITY
The required number of pounds of steam generated per hour to develop contract shaft horsepower and maintain the specified pressures and temperatures in the plant, when divided by the number of installed boilers. |
AIRFLOW TRANSMITTER
A diaphragm type airflow transmitter, used in the boiler combustion control system receives its high-pressure signal from the boiler windbox. |
WATER COLUMN
A vertical tubular member connected at its top and bottom to the steam and water space respectively to a boiler, to which the water gage, gage valves, high and low water alarms and fuel cutoff may be connected. |
TRY VALVE
One of three valves mounted on a boiler or water column within the visible range of the gauge glass and used to check the water level. |
PORCUPINE BOILER
A boiler having dead end tubes projecting from a vertical shell.
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PLATEN
1.A flat plate against which something rests or is pressed. 2. The rubber-covered roller of a typewriter against which paper is pressed when struck by the typebars. 2. A flat surface for exchanging heat in a boiler or heat exchanger which may have extended heat transfer surfaces.
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OPERATING WATER LEVEL
The water level in a boiler drum which is normally maintained above the lowest safe level.
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OPEN-CYCLE ENGINE
An engine in which the working fluid is discharged after one pass through boiler and engine.
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ONCE-THROUGH BOILER
A boiler in which water flows, without recirculation, sequentially through the economizer, furnace wall, and evaporating and superheating tubes.
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