[Robotgroup] Propane Torch

[brooksdesign]

Good to know .I just use them because I had several extras when I re-hosed my cutting torch a few years back.
  Latest update on my latest project up here :For the last two weeks I have been helping design a vaccum cleaner impeller balancing machine for Samsung Korea .Our China office made the proposal Tuesday giving it a price tag of over half a million bucks .Scary part is their first question was could we up the timeline to deliver faster than our competitors ,as in ,we may actualy get the job .We do alot of balance detection but they are counting on me to make the correction machine work .I've been trying to descurage that sort of thing but they seem to have more faith than I do .Odd ,they never listen to me on the easy stuff ...
-brooks
She was just a whiskey maker but I love her still 

-----Original Message-----
>From: Edwin Wise <edwin at simreal.com>
>Sent: Aug 28, 2007 2:19 PM
>To: The Robot Group Mailing List <robotgroup at puremagic.com>
>Subject: Re: [Robotgroup] Propane Torch
>
>
>On 28 Aug 2007, at 11:44 AM, brooksdesign wrote:
>
>> if you want to modify by adding hose or differant nossle you may  
>> want to add a check valve or device I think is called a flash back  
>> blocker which is kind of like a stone filter for fish tanks but is  
>> made of a low melting point metal powder that seals itself if the  
>> flame tries to travel back up the hose .you can get them at any  
>> welding supply place .
>
>A flashback arrest is a good device (it acts by cooling any flame  
>that flies back up the tube, extinguishing it) and is vital for  
>systems that use extremely volatile gasses such as acetylene.   
>Acetylene is touchy stuff -- but in my reading so far, nobody seems  
>to think you need one for propane.  Propane won't burn in the tube w/ 
>o air, and unlike acetylene it won't ignite due to shock waves or  
>pressure, so as long as you have positive pressure, it should be good.
>
>If I'm mistaken, please point me at a good reference... I've done a  
>fair chunk of research so far and propane seems to be pretty darned  
>safe overall.
>
>Be careful about hoses and stuff, though; propane dissolves rubber.   
>A good supplier for parts is:
>
>http://www.cajunshoppe.com/burner.htm
>
>and
>
>http://www.flameengineering.com/
>
>Edwin!
>
>
>
>
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