[TheForge] WHICH Harris torch for propane?

[Paul Sperbeck]

Hey Jer

I got the 450,000 from Peters post at 3:58pm.
It must have seamed reasonable as I have a Smith Equipment ST-625 which
can run up to 455,000 BTU/H consuming up to 240 cfh... doesn't quite
jive with the 2300 something BTU per cubic foot... but there you are.

All I know is that that monster works great fed with 2-100 pound propane
tanks. One will work but neither for too long. Kinda neat having a
Johnson Slot forge in your hand...

see:
http://www.nbmc.com/heaters/lpchart.html
To max out any torch you almost need a vaporizer using toy tanks. Good
thing we usually don't heat for hours on end.

For steady work see:
http://www.bakersgas.com/vaporization-rates-propane-tanks.html
500# tank looks about right.

paul

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On 07/17/2013 07:45 PM, Jerry Frost wrote:
> The only gaugeless reg is the propane meter, though the oxy only has a
> little popup gauge and is set by a vernier. When you say 450,000BTU in
> what time is that? You hear a lot of marketing jazz that doesn't
> really stand up, for example, saying your furnace burner puts out
> 100,000BTU doesn't mean anything unless it's 100,000BTUs/hr.  Of
> course I may have just missed it, I haven't been following the thread
> very closely. I've been waiting for the BONANZA!! to jump in. <grin>
>
> Truth is Propane has more BTUs than folk think, it isn't as HOT as
> acet but it has more BTU's /gl. I know I can crank my propane forge to
> melt the fire brick liner hot and keep it there for 6-7 hrs on less
> than 2 gl. of propane and that's running atmospheric air, not oxy. The
> hard fire brick I use is 3,000f+ working temp and I can melt it in my
> forge. My rose bud will slag it in a few seconds, the surface ripply,
> glassy and being blown around by the flame while the the heat hasn't
> penetrated 1/2".
>
> Sometimes I wish I'd taken that dealership when Lyle offered it, I
> might've been able to answer some of this without speculating so much.
> Oh well, I'll continue to watch and hope for the best.
>
> Jer
>
>
> On 7/17/2013 12:58 PM, Peter Fels & Phoebe Palmer wrote:
>> My guess is that the Gauge-less regulator format is just AllStates
>> being cheap and maximizing profits.
>> It seems probable that their present graceless greed will  finish
>> pushing them out of torches and into lawnmowers and ammo.
>> I was way less than delighted after my 2 phone conversations with
>> them too.
>> I'm still not clear on, if the official Allstates  propane regulator
>> is significantly different, in terms of  on demand propane volume,
>> than the other regulators listed here.
>> Jim B reported that switching to a 2 stage reg made a difference.
>> If this puppy is going to put out 450,000 BTU...It's gonna suck a lot
>> of gas!
>> Perhaps one of those big , old 10" diameter, commercial propane regs,
>> with great big flow seats, is what we need?
>>
>> On Jul 17, 2013, at 11:48 AM, Jerry Frost wrote:
>> Thanks Clyde. After having Allstates repair one of my regulators I'd
>> rather not do business with them anymore if I can help it. the
>> attitude was just too "take it or leave" it for my taste. Lyle and I
>> got along great but maybe that was because I sold a lot of torch sets
>> for them. Oh well I'm glad to have the info to replace components
>> when these wear out.
>>
>> How's the Paleometallurgy in the McMillen swamp going?
>>
>> Jer
<<snip>>