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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.

# 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 9 names in this directory beginning with the letter V.
vacuum gauge
A pressure gauge used to measure pressure less than atmospheric pressure.
variable-area flow meter
A meter that maintains a constant differential pressure and allows the flow area to change with the flow rate.
variable-frequency drive (VFD)
See variable-speed drive.
variable-speed drive (VSD)
A motor controller used to vary the frequency of the electrical signal supplied to an AC motor in order to control its rotational speed. Also called a variable-frequency drive.
vent condenser
An internal element in some types of deaerators that condenses steam and uses the heat produced to warm the feedwater.
venturi tube
A flow restriction device consisting of a fabricated pipe section with a converging inlet section, a straight throat, and a diverging outlet section.
vertical firetube boiler
A one-pass firetube boiler that has tubes in a vertical position.
The measurement of the internal resistance of a fluid to flow.
volatile gas
The gas given off when coal burns.
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