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Spot Welding Machine for Propane torch weedburner??

Spot Welding Machine for Propane torch weedburner??

Welding Automation for Propane torch weedburner??

laser Welding Machine for Propane torch weedburner??

Welding Automation for Propane torch weedburner??

Welding Automation for Propane torch weedburner??

Platform Spot Welding Machine for Propane torch weedburner??

Platform Spot Welding Machine for Propane torch weedburner??

Propane torch weedburner??


Tue, 31 Aug 2021 16:14:11 GMT
Has anybody every made one of these propane torches used to burn weeds? I have always had one at the deer lease for starting fires, but I cant find it anymore. It seems really easy to make, but i was wondering if it would be dangerous? I know their would need to be some sort of backflow device, but i dont really know much else. Thanks, NickNick
Reply:I don't know if you'd need a backflow preventer.  From what I understand backflow is a problem, like on an O/A setup, only when fuel gas(acetylene), and accelerator(O2) wind up in the same line.  Otherwise the propane shouldn't burn on its own, it depends on outside air for combustion."Any day above ground is a good day"http://www.farmersamm.com/
Reply:I have built quite a few of them that were used for utility heating and thawing.My latest design is simple fast and dirty; starts with about a 4 foot length of 3/8 or ½ pipe that is threaded on both ends: Thread a ball valve on one end of the pipe and a pipe cap on the other. Attach a hose barb and fuel line to the ball valve. Drill a small hole in the cap, about 1/8" or so, that's the gas orifice. Next, you need a nozzle to build air velocity around the gas orifice. A short chunk of car muffler pipe makes a nice nozzle, a tail pipe extension about 8"-12" long is ideal, and is already bent at a nice angle. Slide the gas pipe into the nozzle, and then flatten the end of the muffler pipe that is nearest the ball valve so that it contacts the gas pipe, but still allows for plenty of air intake flow. Fire the torch up and play with the propane pressure setting, the nozzle location, and orifice size, to adjust to what you think is an ideal roar for your purposes. Once it's tuned, weld the nozzle to the gas pipe. That's it. I've built a bunch of 'em, never had a problem.  I'll try to post a picture tomorrow.Good LuckLast edited by denrep; 10-27-2008 at 11:55 PM.
Reply:They are still around. I found them at the local Propane Gas Distributor in my neighborhood. Also try Tractor Supply Stores. They are about $70.00 bucks nowadays, come with 8 to 10 ft. hose and flow regulator that is incorporated in the fitting that is connected to the tank.
Reply:70.00 vs. Denrep Industries design.  Sounds like ingenuity wins the day"Any day above ground is a good day"http://www.farmersamm.com/
Reply:Hey that would be awesome if you could post some pics!!! That is exactly what i was wanting to do but wanted to make sure it is safe so i dont blow my wife and i up!!Nick
ReplyPropane torch weedburner??70 is waaaaaay to high.$20 at Harbor Freight  http://www.harborfreight.com/cpi/cta...emnumber=91033The 'fancy' one with the built-in igniter, $30  http://www.harborfreight.com/cpi/cta...emnumber=91037The one at HomeDepot is $50 http://www.homedepot.com/webapp/wcs/...egoryID=501201Note that at a rated 500,000 btu/hr burner, it SUCKS propane FA-S-T.  Enough to really chill a 20 lb cylinder and definitely drops the pressure/flow out of the tank due to the temperature drop and resultant vapor pressure dropIt will pretty much totally chill a 1 lb disposable cylinder if you rig it up via an adapter.    As in down to -40 and all liquid and no more gas.  The best laid schemes ... Gang oft agley ...
Reply:A common propane torch with the nozzle removed, compared with a well used Denrep Blaster: Attachment 24645Flame was adjusted red for photo purposes, usually roars with a blue flame.A view of the working end of a new propane torch:Attachment 24644Both of the factory built torch orifices are quite small, maybe I'm wasting fuel with the 1/8" plus orifice.Last edited by denrep; 10-19-2010 at 11:38 PM.
ReplyPropane torch weedburner??enrep, IIRC the 'factory' unit is using the small diameter orifice because it is sending full tank pressure to the torch tip.  There is no regulator (unless there is another small orifice somewhere in the tube/handle/hose/fittings).And you're right on the ROAR of those things.  When I hit the 'full power' button (as opposed to the idle/pilot flame) it really does ROAR.  It is sick and scary and fun all at the same time.btw, my -house- furnace is 'only' 125,000 Btu/hr.  The weed-burner is 500,000 Btu/hr.  Not counting the flow-rate/pressure drops (and hence 'power'/flame output), that means a full 20 lb propane tank (which is only 16 lbs of propane with the 80% OPD valve) will last for 41 minutes of Flame-On use.  The best laid schemes ... Gang oft agley ...
Reply:Heck, I think mine was on sale at HF for $10.  Works great for heating large PVC pipe for bending, too.
Reply:I have built quite a few like this. About 5" of 3" exhaust pipe with 3 pieces of 1/4" CR weldes to a 1/3" pipe collar which is drilled and tapped to take a 1/4" bolt. The shaft is 1/4" pipe 4' long with a 1/4" grease zerk welded to it that has been ground until the ball and spring fall out for an orfice. It is long enough that you can stand up when using it.Last edited by Oldtimer; 10-28-2008 at 08:14 PM.
Reply:I have built quite a few like this. About 4" of 3" exhaust pipe with 3 pieces of 1/4" CR welded to a 1/3" pipe collar which is drilled and tapped to take a 1/4" bolt for a set screw. The shaft is 1/4" pipe with a 1/4" grease zerk welded to it that has been ground until the ball and spring fall out for an orfice.The other end has a needle valve and a female air coupler.The 3" pipe can be adjusted until you get the proper air mix. No regulator is used. Hook it to your tank and light it off. It will burn with a small flame up to a BIG one. It is noisy.
Reply:Originally Posted by OldtimerI have built quite a few like this. About 4" of 3" exhaust pipe with 3 pieces of 1/4" CR welded to a 1/3" pipe collar which is drilled and tapped to take a 1/4" bolt for a set screw. The shaft is 1/4" pipe with a 1/4" grease zerk welded to it that has been ground until the ball and spring fall out for an orfice.The other end has a needle valve and a female air coupler.The 3" pipe can be adjusted until you get the proper air mix. No regulator is used. Hook it to your tank and light it off. It will burn with a small flame up to a BIG one. It is noisy.
Reply:a really big one will chill a 100lb tank.cant be beat for heating though.insert thoughtful quote from someone else2000 Thermal Arc 300GTSW 3.5 hours1946 Monarch 20 x 54 Lathe1998 Supermax 10x54 Mill2004 Haco Atlantic 1/2" Capacity Lasernot mine but i get to play with it
Reply:i use a zerk for mine.  i have a portable heater/burner like described and i have a zerk mounted in my charcoal smoker and one in my grill for lighting my charcoal easy and quickly.  i have used a zerk for making jet style cookers and have used one for making a submersed element grease fryer.  this style fryer eliminates burning your grease due to meal and such sinking to the bottom  below the element.  you can still burn your grease but not as quickly.
Reply:I use a $20 one for preheating all the time.  It works for me.  I also put a 90* elbow on one and use it to brew 15 gallons of beer.  Its LOUD, but brings the stuff to a boil in no time, then I have to turn it down.  No regulator anywhere, just a valve and orifice.  I also smelt wheel weights for the lead using the same burner set up.Denrep I like yours, but for $20.00 what the heck.Photobucket pics are not showing up and I don't know why.DavidReal world weldin.  When I grow up I want to be a tig weldor.
Reply:Had the $20 HF one. Hand valve scraped out in a couple days. I guess it all depends on what you need them for. I ran these two $70 ones for over 66 hours combined, 40 mins. on-time each to preheat the job I had at the time. You think I paid too much for them, I was considerng buying these. http://www.belchfire.com/web/Side note: In order to run both simultaneously, needed to feed from a 125 gallon Pig Tank so as not to loose pressure due to frost development and pressure loss that is more noticeable/inherent with the 20 lb grill cylinders.Anyhow here is what I used them for, preheating a 1300 lb ring prior to welding.Made major noise and ambient heat. My swimming pool got a lot of use last summer.  Attached Images
Reply:Is that the snorkel ring you did?"Any day above ground is a good day"http://www.farmersamm.com/
Reply:Kell, I thought this thread was dead so I took the pictures down. CR is cold rolled. I didn't correct my wrong keystroke either. It should be a 1/2" pipe collar.Last edited by Oldtimer; 12-23-2008 at 12:52 PM.
Reply:Used one of these belchfire torches to preheat a cylinder head die for casting aluminum cylinder heads.  Would run off of LP or natural gas and compressed air(not oxygen).  Incredible heat.....Nice safety features to.  The torch had a safety cutout, if the flame were to go out for any reason, a gas valve would automaticly close to cut off the fuel supply. Originally Posted by OMSYou think I paid too much for them, I was considerng buying these. http://www.belchfire.com/web/
Reply:Since this thread is still alive, I might as well mention that free regulators are often available around here, removed from scrapped propane bar-b-cue units. I had dozens with their hoses and some still with attached burners, but have reduced my supply to a large bucket full (I think).I'm not suggesting that these large burners need a regulator, but a smaller one is (and some other applications are) easier to control when using a regulator.
Reply:Originally Posted by farmersammIs that the snorkel ring you did?
Reply:My application is a propane-fired heat exchanger to preheat the coolant of a diesel engine.  I found out that a plumber's torch doesn't produce enough heat, so I decided to either buy or build a torch.  I went to a harbor freight store and looked at their weedburners.  While I was in the store I also noticed mig welder tips.  I bought a pack of .030" tips.  I used one of the tips and some plumbing parts to made a torch sort of like denrep's, and I run it off one of the little Bernzomatic cans, with no regulator.  I turn up the valve until I get the flame I want.  Now I wonder how much pressure am I putting into that tiny orifice to get that much flow?  Probably pretty high pressure.I want to use a larger propane tank with a regulator, so I have to figure out how much pressure I need so I can choose the regulator.  I may try to see how big I can make the orifice and have the torch still work, thus requiring less pressure.  I guess I could make a homebrew water column pressure gauge with some glass tubing in the shape of a U.  So many projects, so little time...Oldiron, I like the sound of free regulators and would gladly go on a salvage hunt.  Got any tips on where to look for them?Last edited by kell; 12-24-2008 at 10:43 PM.
Reply:Originally Posted by kellMy application is a propane-fired heat exchanger to preheat the coolant of a diesel engine.  I found out that a plumber's torch doesn't produce enough heat, so I decided to either buy or build a torch.  I went to a harbor freight store and looked at their weedburners.  While I was in the store I also noticed mig welder tips.  I bought a pack of .030" tips.  I used one of the tips and some plumbing parts to made a torch sort of like denrep's, and I run it off one of the little Bernzomatic cans, with no regulator.  I turn up the valve until I get the flame I want.  Now I wonder how much pressure am I putting into that tiny orifice to get that much flow?  Probably pretty high pressure.I want to use a larger propane tank with a regulator, so I have to figure out how much pressure I need so I can choose the regulator.  I may try to see how big I can make the orifice and have the torch still work, thus requiring less pressure.  I guess I could make a homebrew water column pressure gauge with some glass tubing in the shape of a U.  So many projects, so little time...Oldiron, I like the sound of free regulators and would gladly go on a salvage hunt.  Got any tips on where to look for them?
Reply:Get an electric block heater, and save yourself a lot of grief"Any day above ground is a good day"http://www.farmersamm.com/Oldiron, I like the sound of free regulators and would gladly go on a salvage hunt. Got any tips on where to look for them?
Reply:"Get an electric block heater, and save yourself a lot of grief"Have one, live off the grid, can't use it."Oh Man please say it ain't soI almost set my Allis on fire by using a salamander heater to put some heat into the block. I had it set up on a ladder to get it to the right height to blow on the injector side of the engine. Went in the house to warm up, came out after around 5min. and the oil and crap on the block was smokin'. I mean SMOKIN'!!!!!!!! Damn near burnt to ol' girl down to the ground.I hope the heat exchanger is somewhere else than under the hood. Like........ maybe in the next county"You guys act like a BUNCHA OLD LADIES.Right now I'm doing some experimenting with a pressure gauge and drilling out tip apertures of various sizes to see what kind of pressure I need and them I'm gonna get a regulator.And no it's not under the hood.It's in the cab.BWAHAHAHAAA!!!Hey Oldiron, thanks for the tips.See youse guys later.Last edited by kell; 12-26-2008 at 10:01 AM.
Reply:KellUp here in Northern B.C., the loggers have block heaters on most of their equipment, but most times, they are many miles from the nearest power line!  So they just take a generator out early on Monday AM and plug in the block heater for about an hour and they are good to go!  And believe me,  it gets cold here!  We finally got up to 8* F (only to get more snow) and that is the warmest it has been here in over two weeks!  Many nights have been between -20F to -30FI'm curious, where do you live that you are off the grid?Here is what I have so Far:Miller:Shop Master 300 A A/C D/CS 22a Wire FeederRFC-14 Tig PedalHF-251D High Freq. UnitProfax 250 A Mig GunVictor RegulatorsHarris:63-2 torch Cutting Attachment 49-3making home built tig cooler

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