Here some terrific cutaway views of radiator supply valves, including the Gorton Quarter Turn Packing Lock Radiator Valve, from Gorton & Lidgerwood Co. of New York. Thanks to Frank "Steamhead" Wilsey for sharing.
The Improved Webster Type "R" System of Steam Heating is a service bulletin from Warren Webster and Company (The Pioneers of Vacuum Steam Heating), established in 1888.
This manual was created by O-E Specialty Manufacturing Co. and outlines how to install the "O-E" Perfect System, which is a Vapor Vacuum heating system.
Here is the original Installation and Operating Instructions and Parts List for The H.B. Smith Company's Oil Fired Cast Iron Hot Water Boilers (No. OHB-13W). This is esti...