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Boiler- & Burner-Related Glossary Terms

Trying to learn your way around your boiler? These terms are a great place to start.

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# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
There are currently 15 names in this directory beginning with the letter A.
absolute pressure (psia)
Gauge pressure plus atmospheric pressure.
accessory
A piece of equipment not directly attached to the boiler but necessary for its safe and efficient operation.
accumulation test
A test used to establish the relief capacity of boiler safety valves.
acidic
Any water with a pH less than 7.
actuator
A device that provides the power and motion needed to manipulate the moving parts of a valve or damper used to control fluid flow through a final element.
air atomizing burner
A fuel oil burner that sends compressed air and pressurized fuel oil through a nozzle into the furnace where the vaporized fuel mixes with air and is ignited.
air heater
A heat exchanger used to heat combustion air for the furnace, located in the breeching between the boiler and the chimney.
alkaline
Any water with a pH greater than 7.
analyzer
a device used to measure flue gas constituents and temperature for analysis. This device can also calculate the boiler’s efficiency.
annunciator
(1) An audible electronic alarm that alerts the operator of an operating condition that needs immediate attention. (2) a component of the boiler’s Flame Safe-Guard that provides more detailed fault information.
anthracite coal
A geologically old coal that contains a high percentage of fixed carbon and a low percentage of volatile matter. Also known as hard coal.
API
A value used by the American Petroleum Institute (API) to describe the density of fuel oil.
area source facility
A facility that emits less than 10 tons per year of any single air toxic and less than 25 tons per year of any combination of air toxics.
ASME Code
A code written by ASME International (formerly the American Society of Mechanical Engineers) that governs and controls the types of material, methods of construction, and procedures used in the installation of boilers.
automatic blowdown
The process of automatically controlling the amount of boiler blowdown in order to maintain the level of total dissolved solids at the given setpoint.
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