[TheForge] Re: morphed GAS FORGE QUESTION

[David E. Smucker]

Got any pictures of this set up?  or can you direct me to any on the web?

Dave Smucker
----- Original Message ----- 
From: "Roger Olsen" <erik at methow.com>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Tuesday, October 05, 2004 10:44 AM
Subject: [TheForge] Re: morphed GAS FORGE QUESTION


> Andy,
>
> Did you build any special burner end where your pipe enters your forge? 
> If so
> what, if not is your forge LOUD?
>
> I built a burner end for mine based on a Japh Howard design.  Basically it 
> is
> 'The Rosebud Concept'  the volume of air that can pass thru a 1 & 1/4" 
> pipe.
> Divide that up into individual holes the size of straws,  basically a big
> rosebud.  It is truly effective and much much quieter.  A bit of work to 
> go
> thru the process involving a 1&1/4 to 3 bell,  some beeswax in the bottom 
> of
> the bell to hold the straws in place while the castable refractory sets 
> up, a
> template pattern to hold them in place on top but it is worth the trouble.
> mine has been up and running with this design about 7 years.
>
> R Olsen
> __________
>
> Gladish Family wrote:
>
>> I'm using one of Grant Sarver's excellent squirrel cages (actually I 
>> don't
>> know what a PP blower is), but it's about four times the blower I need so
>> the air gate stays closed almost all the time, which might indicate that 
>> the
>> air velocity is low...
>> It's a real hot rod as is, this being the only issue to catch my notice. 
>> If
>> I turn up the air (and gas to balance) everything goes white and steel
>> starts burning.
>> Thanks for your suggestions!
>> Andy G.
>>
>> >
>> > Hey Andy,
>> >  Is it a squirrel cage or Positive Pressure blower?
>> > I would suspect the tube is too small.
>> > You might try a 2" tube with a 11/2" bell reducer on the end to
>> > increase the
>> > gas/ air velocity.
>> > I also like to put a 1/8" S/S mesh screen between the pipe and the 
>> > reducer
>> > to act as a flame blow back preventer.
>> > If you are concerned about low propane pressure make sure your fuel 
>> > nozzle
>> > points down stream in the burner tube and increase the hole size to 
>> > insure
>> > adequate fuel for a neutral and/or reducing flame.
>> > Finally make sure the burner tip doesn't extend into the forge beyond 
>> > the
>> > forge wall, and pack any gaps with satenite soaked inswool to prevent 
>> > the
>> > forge back pressure from externally heating the burner pipe.
>> > Chuck
>>
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