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 490
D Fig. 16. ■Sectional View of Diaphr.\gm Valve. … Fig. 17.Johnson Sylphon Bellows Valve. This bellows is rolled from a single piece of brass with no soldered seams, and the air con-nection is made at the back of the outside casing, which is air tight. In this way less air is re-quired to operate the valve than would be necessary if the air was…
Building · Heating · Ventilation
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
