Radford's cyclopedia of construction; carpentry, building and architecture. Based on the practical experience of a large staff of experts in actual constrcution work (1909)
Johnson, Alfred Sidney, 1860-, Radford, William A., 1865- · Chicago Radford Architectural Co · leaf 156
HEATING AND VENTILATION 129 pressure equal to or below that of the atmos-phere. The Trane system involves the use of a cupof mercury in the center of a device called amercury seal, as illustrated by Fig. 97. Aspecial form of automatic air-valve, ha^dng aunion drip connection, is used on the return… … Fig. 99. Eetainer Valve. of each radiator. An air-pipe connecting to thisvalve is carried to the basement, where it isjoined into a larger air-pipe called an air-main.This line follows closely the direction of thesteam main, terminating at a point near to theboiler, where it drops down and connects…
Architecture · Building
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