A treatise on architecture and building construction (1899)
International Correspondence Schools · Scranton, The Colliery engineer co. · leaf 307
to suit all con-ditions of weather and service. Usually the system is operated with exhaust steam, thesupply being arranged as shown in Fig. 63. The piping isusually arranged on the two-pipe system, and the returns aregenerally made independent, although it is not necessary todo so in all cases.… … Fig. 64. out by means of the vacviiini pump v, which thus maintainsa constant vacuum of any degree desired in the returns. By this arrangement any steam may be used in the radia-tors that is warm enough to operate the traps. It permitssteam to be used at a pressure far below the atmosphere,and at…
Architecture · Building
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