National boilers, radiators, and specialties: catalog no. 26 (1920)
National Radiator Company · National Radiator Company · leaf 79
. When used for controlling the temperatureof water in storage tanks where water is heatedby a tank heater, the regulator may be con-nected into one of the tappings on the top of the heater, if convenient, and the weights so placed on the lever, that any temperature may be maintained in the tank,… … The Honeywell Vapor Relief is designed andconstructed to be placed on atmospheric vaporheating boilers. This extremely simple and inexpensive devicecontains no valves or mechanical parts of anykind —just three open tubes through whichvapor and water circulate when the relief isoperating. It is made…
