Building and Engineering Catalog 1921 Edition . MG6HOffUAH NGIOWXTMAH HOTMAM MRSEf*ft*TOR * CHECK *M»ft* Vapor System With Single Stcam Mmn and Wet Return «*Or*TO«S OFTMC?MOT WATEH TTPtARC STEAM flAOlATO^ DC WdCO V> I Tm • XOFMAN VAtVt FOB System With PTble Bkancii5n m Main and Dry Return IMPORTANT NOTES. The typical systems herewith shownillustrate the manner of insl ailing HoffmanSpecialties in various types of vapor andvapor-vacuum systems. The simplicitof the layouts is worthy of note; for, insystems where Hoffman Valves are used,the arrangement of piping is not un
Building and Engineering Catalog 1921 Edition . MG6HOffUAH NGIOWXTMAH HOTMAM MRSEf*ft*TOR * CHECK *M»ft* Vapor System With Single Stcam Mmn and Wet Return «*Or*TO«S OFTMC?MOT WATEH TTPtARC STEAM flAOlATO^ DC WdCO V> I Tm • XOFMAN VAtVt FOB System With PTble Bkancii5n m Main and Dry Return IMPORTANT NOTES. The typical systems herewith shownillustrate the manner of insl ailing HoffmanSpecialties in various types of vapor andvapor-vacuum systems. The simplicitof the layouts is worthy of note; for, insystems where Hoffman Valves are used,the arrangement of piping is not unlikethat of the two-pipe Gravity system withwhich all heating contractors are is a policy of this Company to eliminateall of the mystery which has surroundedthe so-called Special Systems. The general arrangement of valvesand piping in Vapor and Vapor-Vacuumsystems is similar; the only differencebeing in the type of Return Line Vents. d VAPOR SYSTEMS. In vapor systems the mains may bevented by eross-eonnecting steam mainind return line, installing a No. 8 valveat (A). (In small systems a No. 3 valvemay be used.) As an alternate, a No. 4valve may be located at (B). omittingthe cross-connection between the steammain and return line. In s
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Keywords: ., bookcentury1900, bookdecade1920, bookidbuildingande, bookyear1921
