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 536
rough the web forming the seat so as to permit sufficientcirculation to take place to prevent freezing when valve is closed. A much simpler form ofhot-water radiator valve, of the butterfly type, is manufactured and serves the purpose of con-trolling the flow, although it does not close perfectly…
Building · Heating · Ventilation
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
