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Building a well working Venturi Burner |
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A Forge needs some sort of strong heat source - originally this was charcoal and hand powered bellows.... later coke and other solid fuels.
and "recently" (compared to other forging inventions) gas has become quite popular. LPG (Liquid Porpane Gas) is a very clean and easy fuel for forges.
Gas forges are very clean and easy to maintain.
Personally I prefer blower powred gas forges, as I feel they offer the best control - however depending on your situation and needs (portability, no electric source, no blower) a venturi burner can be an equal alternative.
The venturi system is rather simple:
Gas is injected at a higher pressure through a small nozzle to the inside of a prolonged tube. This will create a draft / Suction and force air to follow at increased speeds and when entering the burners nozzle will mix and give you a good mix of air and gas ready to ignite.
The amount of air can be regulated with chokes over the burners air-inlet.
Venturi burners are not my invention - the technique is rather old and well known.
There are many ressources on the internet going in depth about the various types of venturi burners.
The plans I offer below are a burner model I have created and found to work well. it's for a smaller to medium sized forge and will with the proper insulated forge yield welding temperatures if needed.
it can be operated within 0-3.5bar (0-50psi) and will burn very stable (this range has been tested, but most likely it will still work at higher pressures if needed).
 Venturi Burner 582.08 Kb
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