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A part of the Inert Gas System on the deck which purpose is to prevent combustion gases to flow back and enter the burner.



Related Terms

BETA RATIO

For a single orifice the beta ratio is the ratio of the orifice bore diameter to that of the upstream pipe diameter. However, since in burner designs typically there is more than one orifice at a riser pipe exit, the beta ratio is equal to the square root of the ratio between total area of the fuel ports to that of the upstream pipe area.

BURNER

A device which combines fuel and air in proper proportions for combustion and which enables the fuel-air mixture to burn stably to give a specified flame size and shape.

BURNER ASSEMBLY

A burner that is factory-built as a single assembly or as two or more assemblies which include all parts necessary for its normal function when installed as intended.

ATMOSPHERIC BURNER

A gas burner in which all air for combustion is supplied by natural draft, the inspiriting force being created by gas velocity.

NATURAL-DRAFT BURNER

A burner which depends primarily on the natural draft created in the flue to induce the air required for combustion into the burner.

POWER BURNER

A burner in which all air for combustion is supplied by a power-driven fan that overcomes the resistance through the burner to deliver the quantity of air required for combustion.

BURNER BLOCK

Also called 'burner tile', 'muffler block', or 'quarl'. The specially formed refractory pieces which mount around the burner opening inside the furnace. The burner block forms the burner's airflow opening and helps stabilize the flame.

BURNER CAPACITY

Amount of heat release a burner can deliver (i.e., amount of fuel which can be completely burned through a burner) at a given set of operating conditions.

BURNER WINDBOX

A plenum chamber around a burner in which an air pressure is maintained to ensure proper distribution and discharge of secondary air.

AIR-ATOMIZING OIL BURNER

A burner for firing oil in which the oil is atomized by compressed air which is forced into and through one or more streams of oil, breaking the oil into a fine spray.

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