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Engine sheds in the UK were equipped with sand drying stoves, so that sandboxes could be refilled each morning with dry sand. Steam locomotives in the US had a single sandbox, called a sand dome, atop the boiler where the rising heat helped to dry the sand. Even with this arrangement, sand pipes tended to clog, and by the 1880s, pneumatic ...
Cutaway section of a steam dome, showing the regulator inside. The steam dome is a vessel fitted to the top of the boiler of a steam engine.It contains the opening to the main steam pipe and its purpose is to allow this opening to be kept well above the water level in the boiler.
Steam dome Collects steam at the top of the boiler (well above the water level) so that it can be fed to the engine via the main steam pipe, or dry pipe, and the regulator/throttle valve. [2] [5] [6]: 211–212 [3]: 26 Air pump / Air compressor Westinghouse pump (US+) Powered by steam, it compresses air for operating the train air brake system.
To increase the adhesion and improve performance, PRR enlarged the sand dome on the S1. It ensured the supply of sand for steam sanding and slightly increased the axle load above the first and second set axle. The S1 was partially de-skirted in 1942 to improve the visibility of the reciprocating parts for the crews and better operation. [25]
A drawing design of the N&W class J locomotive. In the late 1930s, the Norfolk and Western Railway's (N&W) K2 and K2a 4-8-2 "Mountains" could not handle the rising passenger traffic after the Great Depression abated, so the N&W opted for a more powerful and fancy-looking passenger steam locomotive.
The simplest type of steam separator is the steam dome on a steam locomotive. Stationary boilers and nuclear reactors may have more complex devices which impart a "spin" to the steam so that water droplets are thrown outwards by centrifugal force and collected. All separators require steam traps to collect the water droplets that they remove.
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Early models are noted for their semi-streamlined appearance, with the feedwater heater positioned between the sand dome and chimney and enclosed in a long casing. This design earned the nickname "Slug" (ナメクジ, Namekuji). Two locomotives, D51 22 and 23, had an extended casing reaching the cab, referred to as "Super Slug" or "Big Slug."