This document is from the sales department at the Hoffman Specialty Co. in 1926. It showcases Hoffman Valves and Controlled Heat Equipment with cutaway diagrams of how the Hoffman No. 2 Vacuum Valve operates. There is also information on how to "vacuum-ize" a one-pipe steam system, the No. 7 Hoffman Adjustable Modulating Valve, Nos. 8 and 9 Hoffman Return Line Valves, the Hoffman Blast Trap, the Hoffman Ther-Kompo Gage, and the Hoffman Differential Loop. And there are diagrams outlining the typical installations of Hoffman "Controlled Heat" Equipment.
This document contains the manufacturer's instructions for the HB Smith Series M450L Mills Water-Tube Boiler for automatic firing with oil or gas (Steam, Vapor, or Water ...
This document contains the jacket assembly instructions for the HB Smith Series 45 Mills Boiler (circa 1979).
This document contains the combustion chamber assembly instructions for the HB Smith Series 45 Mills Water-Tube Boiler for automatic firing with oil or gas (Steam, Vapor,...