Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 170
supply mains must al-ways be accompanied withcheck valves in the returns;otherwise, in case a stop valvein the main steam line isclosed, the water will bebacked out of the main returnsat the boiler, by the pressure. Should the water partially leave theboiler in this manner and then suddenly return,… … Fig. 8. - Check Valve^f^ain return in duct Typical Arrangenmut of Return,Showing Check Valve. 140 steajNI and hot ayater fitting in Fig. S. It is convenient to have an independent drain connectionfrom the returns to provide for drawing off the water in the systemwithout emptying the water from the…
Architecture · Building · Carpentry
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
