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Grand Scales General Code of Operating Rules First Edition January 1, 2007

DEFINITIONS OF STEAM TERMS

Atomizer The portion of a burner, which delivers a jet of steam, used for breaking up fuel oil into small particles to aid combustion and carry it into a burning zone.

Black Smoke Carbon from partially consumed fuel oil. An indication of imperfect combustion due to improper handling or adjustment of the firing devices (over-fueling).

Blower A steam jet used in place of the blast nozzle in the smoke box when the engine is not working steam in the cylinders. It creates a draft in the firebox.

Blue Smoke An indication of imperfect combustion due to improper handling or adjustment of the firing devices (under-fueling).

Brickwork Firebrick used in lining the firebox and firepan.

Burner

A device for atomizing and delivering fuel oil into the firebox.

Damper A metal cover used to cover the air intake to the firepan to regulate the amount of air to the firebox.

Firedoor

A hinged cover over an opening in the rear of the boiler (backhead) through which one may see the firebox for inspection and repairs. The fireman may apply solid fuel through the Firedoor to the fire box.

Firing Manifold

A series of pipes and valves located on the fireman’s side of the cab from which steam is directed through valves to the blower, atomizer, low back, heater, etc., used in firing the locomotive.

Firing Valve

A device for regulating the flow of fuel oil to the burner, operated by the firing valve handle, which latches on the firing valve quadrant. The firing valve quadrant must be equipped with stops at both full-open and closed positions.

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