Hutton, Frederick Remsen, 1853-1918 · New York, J. Wiley & sons; London, Chapman & Hall, limited · leaf 649
r the danger-ous low-water line, made of Banca tin or of some of the cad-mium alloys, which have a relatively low fusing-point. Whenthe disk or plug of such fusible metal is covered with water theheat is transferred so rapidly that it should not melt. When thewater leaves the plug, the lowered… … Fig. 482. in which a brass shell is fitted with a core or disk of fusiblemetal. The objection to such fusible plugs is, first, that themelting-point of most of these alloys changes with time andis not always certain. Secondly, when covered with a crustof boiler-scale they may not be properly cooled…
Mechanical engineering · Steam power plants
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