We have a house which was built in the 1920's which has an old coal furnace converted to gas with a Norman Conversion Burner.
The shut off valve has a very, very, tiny gas leak and I want to replace or repair it.
This valve is not part of the burner itself, the valve is located on the gas pipe supplying gas to the burner.
There is a separate shut off valve for the pilot screwed into a port on the side of the main valve.
The main valve is leaking - oh so slightly, you have to get your nose right at the valve to smell it - at the back of the valve.
There is a spring on the back of the valve which I believe pulls the valve tightly into the seat to seal it.
Does anyone know where I might get a replacement valve? Remember, it has a side port into which the pilot valve is screwed.
Short of that, does anyone know how to disassemble a valve like this to clean it?
It is almost impossible to fully close the main valve, that's why I think it is dirty or corroded inside.
You can see photos of this valve at http://novell.home.att.net/furnace.html
Any assistance will be greatly appreciated.
Bob
P.S. I just thought of something about the hookup shown in the photos at http://novell.home.att.net/furnace.html - that appears to be galvanized water pipe - not black gas pipe coming down from the reduction fitting and into the valve.
What do you think, does the smaller pipe that runs into the valve look like water pipe?
This might explain why the valve is sticking. I've read that gas can cause the galvanizing to come off water pipe. That would produce debris which could clog the valve perhaps preventing the spring from fully sealing the valve.
Perhaps I should replace that pipe if it is indeed water pipe????
On this very old burner, there is no place that debris could block the burner, it is basically just a big pipe from which gas flows and is ignited.
The pilot is also a very simple tube with a small opening. I clean the pilot tube every 2 or 3 years to maintain a good size on the pilot flame.
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Another update - looking at it, I realize someone has painted the pipe. You can see traces of the paint on the valve and on the reduction fitting. So, my guess that it might be water pipe is a little less certain.....
The shut off valve has a very, very, tiny gas leak and I want to replace or repair it.
This valve is not part of the burner itself, the valve is located on the gas pipe supplying gas to the burner.
There is a separate shut off valve for the pilot screwed into a port on the side of the main valve.
The main valve is leaking - oh so slightly, you have to get your nose right at the valve to smell it - at the back of the valve.
There is a spring on the back of the valve which I believe pulls the valve tightly into the seat to seal it.
Does anyone know where I might get a replacement valve? Remember, it has a side port into which the pilot valve is screwed.
Short of that, does anyone know how to disassemble a valve like this to clean it?
It is almost impossible to fully close the main valve, that's why I think it is dirty or corroded inside.
You can see photos of this valve at http://novell.home.att.net/furnace.html
Any assistance will be greatly appreciated.
Bob
P.S. I just thought of something about the hookup shown in the photos at http://novell.home.att.net/furnace.html - that appears to be galvanized water pipe - not black gas pipe coming down from the reduction fitting and into the valve.
What do you think, does the smaller pipe that runs into the valve look like water pipe?
This might explain why the valve is sticking. I've read that gas can cause the galvanizing to come off water pipe. That would produce debris which could clog the valve perhaps preventing the spring from fully sealing the valve.
Perhaps I should replace that pipe if it is indeed water pipe????
On this very old burner, there is no place that debris could block the burner, it is basically just a big pipe from which gas flows and is ignited.
The pilot is also a very simple tube with a small opening. I clean the pilot tube every 2 or 3 years to maintain a good size on the pilot flame.
------------
Another update - looking at it, I realize someone has painted the pipe. You can see traces of the paint on the valve and on the reduction fitting. So, my guess that it might be water pipe is a little less certain.....