Steam Jacket

(redirected from steam jackets)
Also found in: Dictionary.

steam jacket

[′stēm ‚jak·ət]
(mechanical engineering)
A casing applied to the cylinders and heads of a steam engine, or other space, to keep the surfaces hot and dry.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Steam Jacket


a chamber surrounding the housing of a heat exchanger, or the cylinder of a steam engine, through which the heating steam passes. The steam jacket in heat exchangers maintains the wall temperature of the housing at a constant level. The steam jacket of a steam engine maintains the temperature of the cylinder walls at an approximately constant level, close to the temperature of live steam; this reduces the heat loss resulting from initial condensation, which occurs when steam entering the cylinder comes into contact with the cooler cylinder walls. Steam jackets are particularly important for engines that operate on saturated steam, since they substantially increase efficiency.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.