Auxiliary blower

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The auxiliary fan is used at standstill or deadhead a steam engine the suction to increase and sufficient negative pressure in the smoke chamber to produce. The auxiliary blower consists of a tube with fine bores that surrounds the blowpipe mouth in a ring shape. Using a special shut-off valve, the auxiliary blower valve, the steam supply can be very finely adjusted from the driver's cab. The escaping steam jets are distributed in a cone shape, fill the entire cross-section of the chimney and pull air and flue gases into the open. The effect is similar to that of exhaust steam. The auxiliary blower is operated with wet steam .

If cold locomotives are to be heated up quickly, the auxiliary blower can be connected to another source of steam (a steam locomotive or a fixed installation) or a source of compressed air. Therefore, on some locomotives, the auxiliary blower line can be connected to the heating line via a special shut-off valve. Special connection nozzles can also be available for the supply of compressed air.

The rapid heating up of cold steam locomotives by so-called high blowing is harmful to the boiler material due to strong thermal stresses and should be avoided.