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replacing gas valve - will this work?

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Posted by Drew Phillips on January 06, 2006 at 17:58:45:

Dear Sir -

I have a 50 year old natural gas boiler that heats my home with hot water radiators. The boiler is a National - U.S. Gas Boiler No. 6-44. It has a
bimetal electric pilot sensor that is attached to the pilot by 4 screws and is starting to malfunction. I have taken it off and cleaned it, and it is working better - but I would like to replace the gas valve with a new one that has an automatic pilot valve, pressure regulator, and automatic main valve functions in one valve.The other info on the boiler is: Input BTU/hr
337500, Output BTU/hr 270000, BTU/Hr Water 203000, Min. Relief Valve Capacity 270 lbs per hr.
The gas valve that I presently have is a White - Rodgers diaphragm valve, type 2631, No. 2, size 1, max. pressure 172 lbs., volts 25, cyc. 60, amps 4. The valve inlet and outlet size pipe is 1 inch. I've been
looking at a White - Rodgers 36C53 combination gas valve and was wondering if it would give out sufficient gas for my boiler. The 36C53 is rated at 280,000 Btu/hr with a 3/4 inch inlet and outlet, and since my boiler is rated at 270,000 Btu/hr this seems to be OK. Will this valve be a good replacement for the old one? Could you help me with this? I have been very pleased with the performance of the existing valve and hope that I would be able to replace it with one of the same make - since it has lasted over 50 years. It is still working well, but I want to update it for safety reasons. I also added an automatic damper several years ago and an automatic outdoor temperature sensor that changes the boiler temperature according to the degrees outside in order to keep the boiler at the lowest setting to save gas. Do you know of any other improvements I could make to help cut the fuel bills? Please let me know what you think.

thanks - - - Drew

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