Mechanical equipment of buildings; a reference book for engineers and architects (1916)
Harding, Louis Allen, Willard, Arthur C. (Arthur Cutts), 1878-1960 · New York Wiley · leaf 215
n, and exhausting intoa condenser coil equipped in turn with an air trap and vacuum valve is used to free the returnsystem of air, but permits the condensation to flow back to the boiler bj gi-avity. The radiatorsare of the water type and equipped with a graduated supply and special return valve,… … Fig. 21. Section of Vacustat.
Building · Heating · Ventilation
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