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Tool Talk Discussion Forum

Gas or Propane:

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Dick

11-18-2007 16:41:17




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Trying to find out the difference between natural gas and propane stoves.
I bought a nice wood/gas cook stove today. It has a wood firebox on the left side and four gas burners on the right side. I am trying to find out if the ofices for the gas side are propane or gas? On the outlet side of the gas valves, is 1/8" pipe thread with the orfice screwed on to the 1/8" pipe thread. Then the burner tube slips over the orfice. There is an air adjustment inlet with a screw, around where the orfice enters where the burner tubes. The size of the hole in the end of the orfice is .0106. I don't know if this is the size for natural gas or propane. I want to use propane so does anyone know if the orfice needs to be smaller or larger? Also does anyone know where different sized orfices can be pruchased? Any websites for more information? Thanks for any information you can provide.
Dick

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guido

11-23-2007 15:23:33




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 Re: Gas or Propane: in reply to Dick, 11-18-2007 16:41:17  
Hey Dick

Propane orifices are smaller the narural gas.
Propane has a much higher working pressure thats why they are smaller.
Narural gas pressure is at best 6" of water pressure. propane is a few pounds.
Guido



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Red Dave

11-19-2007 06:34:25




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 Re: Gas or Propane: in reply to Dick, 11-18-2007 16:41:17  
You need to have a qualified gas appliance technician look it over to determine the answers to some of your questions.

But generally, propane has more energy per unit of volume than natural gas does. I bought both a gas furnace and a gas range in the past couple of years and both came with two sets of orfices. Both were made to be used with either natural gas or propane and the installer had to choose which was appropriate for the application. The propane orfices were a little smaller than the natural gas ones.

If you bought this used and aren't sure which it is, I strongly suggest that you have somebody qualified look at it to be sure.

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jdemaris

11-19-2007 05:47:29




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 Re: Gas or Propane: in reply to Dick, 11-18-2007 16:41:17  
It depends on how old the stove is - and who made it. Many of the gas stoves built 1920s - 1950s came from the factory as convertible with no extra parts. But, some do and will need new orifices. Either way, the air-shutter adjustments need to be changed. I've converted many - and we have two in our house. Also have one gasoline stove. It you want the thing to be safe - you ought to convert it to a safety-valve system and a standing pilot for the oven if your's doesn't have it. It's pretty easy to do if you have some mechancial skills. Go to some place - e.g. antiquegasstoves - dot - com and you'll probably find out all you need - including reprints of factory owners manuals.

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Greg_Ky

11-18-2007 17:03:35




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 Re: Gas or Propane: in reply to Dick, 11-18-2007 16:41:17  
Try This



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RayP(mi)

11-18-2007 16:50:17




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 Re: Gas or Propane: in reply to Dick, 11-18-2007 16:41:17  
On the last cook stove I worked on, there was a dual regulator on the incoming fuel line. Take the top cap off and reverse the little piston underneath for your choice of fuels. They should be marked on the piston. Then you may have to regulate the air gates for proper air mixture. Hope someone can be a little more informative. Would be nice if you had a manual for the stove, can you contact the manufacturer?

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T_Bone

11-18-2007 19:28:10




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 Re: Gas or Propane: in reply to RayP(mi), 11-18-2007 16:50:17  
Hi Ray,

Not all gas regulators designed for LP and Natural gas convert that way.

The orifice also needs to be changed when changing fuels and safety checks need to be made before firing the burner and that's why I've always stated:

Repairing gas appliances by internet will surely get soneone killed as it takes "books" written on the subject to properly service gas appliances.

T_Bone



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