Forges Venturi or Blower

Venturi or Blower

  • Venturi

    Votes: 0 0.0%

  • Blower

    Votes: 0 0.0%
  • Total voters
    0
I have them both and it really depends on what I'm doing. I am not really sure the blower gets hotter than my mini mongo's but if I don't keep a good flare on the mongo it stovepipes very badly. That seems to be the difference to me, the blower will get welding hot and I'm not constantly pitting out pipe fires.
 
I have neither. :grumpy:

I'd take one of each though! :D
 
Bruce,

You happen to know just what that forge is, what brand if it's commercial? i was attracted to that piece, too. I wrote the good doctor about it, but he didn't deign to reply.
 
IG,

The 100 cfm blower came in today. Hooked it up and she gets awfully hot in there, welding temp at 5psi, WHOOEE!! Always did like those BLOWN & INJECTED units at the drag strip!! :D

I don't know if I'll keep horizontal forge as venturi type, been thinkin' about the plumbing I'll need to convert it over. Of course, when I do, I'll have to change the gas also, so I can run one or two burners.

I read a thread from J. Loose a few months ago, I believe he said that his Reil style venturi burners (salt pot) produce excessive CO compared to his blown unit (Fogg style forge).

Gotta get me one of those before I :barf: all over the place.:D :cool:

I guess I'll go with the blower.
 
Mike I dont know if it is a factory unit or homemade but it sure works good doesnt it? If you find out let me know. It looks like a modified version of a ferriers forge from Centaur Forge.
 
John,

MSC catalog has em also. Surplus Center definatly has the best price.
Grainger and MSC both get around $40-50, while Surplus Center is less than $20, with shipping brings total to around $33.:)
 
John,

MSC catalog has em also. Surplus Center definatly has the best price.
Grainger and MSC both get around $40-50, while Surplus Center is less than $20, with shipping brings total to around $33.:)
 
Check with your local air conditioning contractor. A lot of large gas heaters have draft induced vents. When the heater is no good the little fans are still ok. They usually wind up in the dump but make dandy forge blowers.
 
I use Venturi, but I have a question for you guys running with blowers. My LP jet size is a #60 hole, what size do you use with a blower style?

I ask that because LP is LP and has a certain energy value wether it is venturi or blown. X amount of LP will give you Y amount of heat. If you guys are running welding temps at 5 psi, and I am running welding temps at 13 psi, I would think your jet size on the blown blower is bigger. Right?

What I see the big advantage of using a blower is that it can be adjusted easier, which would tend to make them more efficient.

The big disadvantage would be adding another mechanical component into the system. Just one more thing that can take a dump on you.

Anyway, just my $0.02
 
I run a venturi, but it's my first gas forge. I did play around with 7 different designs before I completed my forge.

Will
 
Hi, John,

Another blower to consider is the Kayne & Son forge blowers. They are costly at ~ $85 or so, but they are meant for forges, have huge static pressure, and are built like a tank. I have the 114CFM model and it produces a marvelous burn on a vertical forge based around a 30lb propane tank and fired with propane using a blown modification of a venturi style burner. I know several others (Plain Ol Bill, Diamond G) using this blower very happily.

To answer another question someone asked, I use a 2" bell reducer, 1x8" burner tube, and it uses an 0.035" Tweako tip for the orifice. gas pressure is high at 7-20 PSI, but consumption is relatively low. 2350F welding temp in dry weather, 2550F when it's raining. Makes me wonder what a water-mist injected system would do.

Yeah, Bruce, it does look like a small farrier's forge, but it looks even smaller than the ones I'm used to, and I don't remember it having the side opening for shoes. I watched Nick's tape, and it's been awhile, so the picture in my mind's eye is not real clear. That sure did look like a sweet little forge, though; that part I remember!
I would like to build a smaller horizontal someday to compliment my vertical forge. They both have their benefits. Plain Ol Bill's oval-shaped forge seems to be the perfect compromise. I want to steal his shop, but he mentioned he has that .45 again.....:)
 
I have been using a modified version of venturi forge for a couple of years I built it myself. It is bassed on a mates. I think he got the design from ron reil or similar name about 10 years ago.

I have not seen rons original or latter version. I just know the mods we made to the 10 year old one was to move the inlet pipe to 1/3 of the forge length from the front, The inlet pipe runs at a internal tangent to the roof rather than in the middle. And now we angle the inlet pipe about 15 to 30 degrees back to give a better heat distrubution. We have a back end on the forge which is just a piece of 8 or 10 inch pipe what ever is handy.

I adjust the heat with a regulator valve. I have never used a blower but I don't think I will it just seems like extra parts to break down.

The venturi I use is just a pipe reducer with a single jet facing down the center of the inlet Pipe.

Forge is 16 in long and easilly gets hot enough to weld damascus.

I vote for the venturi method. Not for any scientific reason just
easy to use very few parts.

Easy to make in a back yard shed. I cheated and had the pipe cut to length on a industrial band saw. I don't remember if it was a .8mm jet or similar. Some were as low as .5 I think.
 
I run a Ron Reil style venturi burner (the original EZ burner) that works great, was easy to build and is portable since it doesn't use electricity. With a choking mechanism scaling isn't a problem and is wonderful for forging and aren't too bad in heat treating if you design the forge properly. These burners seem very miserly in gas consumption to me though I've heard others say the opposite.

However, I have used forges with blower type burners and in my opinion they are much more adjustable than the venturi types. By using a simple needle valve in the gas supply line and by adjusting the air from the blower you can rapidly change the forge atmosphere and temperature with greater control than you can with the venturi. While important for forging, this control really shines when heat treating.
 
You must log in or register to reply here.
Back
Top