Reliable Zone Valves

Kniggit

being I was low income I installed an on National-US in my home as a temp untill i could afford a new condensing boiler, whitch model is it mine says it is a 0-3GW I think, it would be grand if I could find an old set of instructions for the !@#$!@#.

Alan(OnVacationInOregon)Forbes

Reliable Mixing Valves

I visited a new customer this afternoon; he has some unusual equipment that I'm not used to seeing. The boiler (original) is made by "National - U.S. Radiator". The mixing valves are made by Honeywell, installed in 1958. They are connected to immersion aquastats and as the water temperature from the boiler increases, they open the return water port to keep the temperature at setpoint.

There was also an unusual B & G Airtrol fitting (see pictures).

Darin(in Michigan)

sorry, wrong thread

> being I was low income I installed an on

> National-US in my home as a temp untill i could

> afford a new condensing boiler, whitch model is

> it mine says it is a 0-3GW I think, it would be

> grand if I could find an old set of instructions

> for the !@#$!@#.

ChasMan

Some info I found, they are still in business!! Although I doubt you can get a manual from them :-)

The company merged into National U.S. Radiator Corporation in 1946. The company named was changed to Natus Corporation in 1955. In 1960, the company's name was changed to Kirkeby - Natus Corporation. In 1961, the comapny's name was changed to United Ventures, Inc. In 1970, the company merged into Federated Development Company. Federated Development Company merged into Federated Natural Resources in 1983.

Weezbo

those are interesting finds....

have you seen a round dial that controls water temp on gravity systems ?it works a bit like an tri aqua stat and shuts down the coal feeder....

tim smith

Old mix valves and national boilers

We see a fair amount of that equipment up here in Seattle, Stuff has been working great for 40 - 50 years +. Not much today that will last that long. Usually have to change out entire valve and motor if fails. Still use Honeywell for replacements usually. Good luck, Tim.