So I've had to build myself a new gas burner and thought I'd take this opportunity to share the process.
I use a gas injector by the company Burlen. They make carburettors and bunsen burners and all sorts of clever stuff. The Amal branded gas injectors are THE best in the business. Not only offering one handed control of the gas/ air mix but you can also adjust the size of the injector tip itself giving further control over your flame and thus forge environment.
Almost all of the parts are pictured here:
In no particular order - glycerin filled pressure gauge, needle valve, gas rated shut off valve, various brass adapters, a quick connect adapter, propane gas hose, Amal gas injector, 8" of mild steel tube, stainless steel flare.
Not pictured is a 0-4bar propane regulator fitted to the propane tank.
Up close you can see the amal injector is a quality bit of kit. Many smiths make their own DIY forge burners and many are ok but they are essentially cobbled together from bits not intended for the task. - They may do the job but will never be as good as one of these.
This particular one is a 3/4" injector, they range from 1/2" up to 2". For general forge use the 3/4" or 1" is more than enough.
So after a bit of screwing together after applying PTFE tape we get this:
I test all joints for leaks with a spray bottle full of soapy water. This is very important! You really don't want any leaks.
I use a quick connect fitting on my gas hose as I like to be able to completely disconnect the forge for ease of storage.
Right then, lets light it up.
The air inlet full closed above, so lets crank it up.
This is at 10 psi:
This is at 30 psi:
It really is an absolute beast. The needle valve allows very fine adjustments to be made which makes monitoring the forge pressure, fuel economy etc a doddle.
My little forge would tick over quite nicely at 10psi. But you could crank it up to 20 psi and it would be really roaring!
So there we go, bit long winded but thought I'd share.
All the best
Andy
I use a gas injector by the company Burlen. They make carburettors and bunsen burners and all sorts of clever stuff. The Amal branded gas injectors are THE best in the business. Not only offering one handed control of the gas/ air mix but you can also adjust the size of the injector tip itself giving further control over your flame and thus forge environment.
Almost all of the parts are pictured here:
In no particular order - glycerin filled pressure gauge, needle valve, gas rated shut off valve, various brass adapters, a quick connect adapter, propane gas hose, Amal gas injector, 8" of mild steel tube, stainless steel flare.
Not pictured is a 0-4bar propane regulator fitted to the propane tank.
Up close you can see the amal injector is a quality bit of kit. Many smiths make their own DIY forge burners and many are ok but they are essentially cobbled together from bits not intended for the task. - They may do the job but will never be as good as one of these.
This particular one is a 3/4" injector, they range from 1/2" up to 2". For general forge use the 3/4" or 1" is more than enough.
So after a bit of screwing together after applying PTFE tape we get this:
I test all joints for leaks with a spray bottle full of soapy water. This is very important! You really don't want any leaks.
I use a quick connect fitting on my gas hose as I like to be able to completely disconnect the forge for ease of storage.
Right then, lets light it up.
The air inlet full closed above, so lets crank it up.
This is at 10 psi:
This is at 30 psi:
It really is an absolute beast. The needle valve allows very fine adjustments to be made which makes monitoring the forge pressure, fuel economy etc a doddle.
My little forge would tick over quite nicely at 10psi. But you could crank it up to 20 psi and it would be really roaring!
So there we go, bit long winded but thought I'd share.
All the best
Andy
