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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.
There are currently 11 names in this directory beginning with the letter O.
ON/OFF control
A combustion control strategy that is used to start and stop a burner without any modulation of the flame.
one-element feedwater regulator
A feedwater regulator that regulates the amount of feedwater by measuring only the actual water level in the boiler.
opacity analyzer
A stack analyzer consisting of a focused light source and an analyzer that measures the received light intensity.
open feedwater heater
A feedwater heater in which steam and feedwater mix with each other at atmospheric pressure to raise the temperature of the water.
operating pressure control
An ON/OFF control with an adjustable differential that regulates the operating range of the boiler between the cut-in pressure and the cut-out pressure by opening and closing electrical contacts.
ordinary hazard area
A building or room that is used as a shop and related storage facility, light manufacturing plant, automobile showroom, or parking garage.
orifice plate
A flow restriction device consisting of a thin circular metal plate with a sharp-edged hole in it and a tab that protrudes from a flange.
Orsat analyzer
An Instrument that measures the carbon dioxide, carbon monoxide, and oxygen in the gasses of combustion.