Two Types of HVAC Brazing Torches (3D)
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- Опубликовано: 12 ноя 2022
- This 3D video demonstrates the differences between two types of HVAC Brazing torches: oxygen-acetylene (oxyacetylene) and air-acetylene (air-swirl). Both setups can be used for HVAC brazing and soldering.
The approximate temperature of an oxygen-acetylene torch at the tip is usually significantly higher than that of an air-acetylene torch. As a result, oxygen-acetylene torches heat the base metal faster than air-acetylene torches. Air-acetylene torches have a larger and broader flame, and oxy-acetylene flames tend to be more concentrated and precise. However, when using an air-acetylene torch, you must be careful because they give off more convective heat, which can damage surrounding components in the work area or cause injury. You may need a heat-blocking substance like the Refrigeration Technologies WetRag HeatShield.
In general, it takes a bit longer to set up an oxygen-acetylene torch with the proper amount of oxygen and acetylene because you have to set that ratio manually. You also need to use a striker to light an oxygen-acetylene torch. Air-acetylene torches achieve the proper ratio automatically, as they draw in air and mix it with the acetylene gas. Many of these also have a sparking mechanism built into the handle.
Overall, air-acetylene is less likely to burn through the tubing but more likely to cause heat damage to surrounding components. It cannot weld steel, but oxy-acetylene torches can. They have more of a wrap-around flame and tend to be less expensive than oxygen-acetylene torches, and they're often lighter because they leave you with fewer cylinders to carry (and without a pressurized oxygen tank, which can be dangerous).
Overall, air-acetylene torches are best for newer technicians, and oxygen-acetylene torches work better in the hands of experienced techs in tight, concentrated areas.
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Thanks for the extra knowledge I gained from this video
Bryan,
This is one of the most useful videos you’ve ever put out. Not to mention the quality and the graphics are out of this world amazing. I’m a 57 year old man with 30 years in the industry, my ignorance was revealed in four minutes. Had I seen this video 20 years ago, I would have been an air acetylene technician.
Great video. You're going to anger the elitist who feel that only Oxy Acetylene should be used in HVAC lol. I use both but a turbo torch on an MC tank is my absolute favorite for rooftop repairs. Everything I need is light and fits in a backpack.
Thank you for taking the time and effort to produce this video. I am still using air- acetylene, and have for years, but am now seeing many techs using oxy- acetylene…good to weigh the pros and cons.
Hi Brian, I would suggest for Oxy-Acetylene brazing rigs the use of Flashback arrestor's on both the handpiece and the regulators. OSHA does not require it, but may be a lifesaver when you use the 'Captains-Hook' burners or any Oxy-Acetylene burners with more than one flame tip. The more flame tips you have the higher the risk of a flashback. Had once a flashback on a captains hook where the flame went back into the neck of the captains hook and burnt through flashback arrestors were used on both the handpiece and the regulators and all the damage was a destroyed captains-hook burner. When I find out your e-mail address I will send you a photo of the destroyed captains hook.
Great tips on torches. Thanks Bryan.
Can't believe you guys are doing this amazing quality 👏 😍
Strongly encourage the use of oxy fuel for commercial work. The wider range of pipe sizes and trickier spaces in which to work (usually) make it a valuable skill
Got both, air acetylene is what i used in 90% of the cases. The oxy acetylene is just very strong and can even melt the copper.
@@tronixfix I find that is mostly the case with people who never adjust their gas pressures. If you leave it at 5/10psi always you’re more likely to burn through a 1/4” or 3/8 line even if you’re using a smaller tip.
@@paulgaras2606 i know what you mean but even with right pressures it will be hard to not overheat the pipes. The oxygen makes it burn super hot.
@@tronixfix yes you could look at it as a bit of a trade off. I do commercial service almost exclusively and Ive run into a lot of situations where braze joints held for a year or two and then let go due to poor penetration, mostly on jobs where the construction crew was using air acetylene torches and newer, less experienced people were doing a lot of the work. If you know your stuff, there’s no difference between air/acetylene and oxygen acetylene You’ll get good penetration with both and you won’t burn the pipe with either. But I just did a compressor set on a vrf system That had been installed without the use of nitrogen while brazing. We had to pull the oil solenoids, the oil separators and all the small cramped piping to blow out residual cupric oxide sludge. Air acetalyne would have made it really hard to work in those conditions. That’s why I say it’s good to get really skilled with oxy/fuel.
@@paulgaras2606 sorry to correct but there's a huge difference between air and pure oxygen. Air can have a lot of moisture unlike pure oxygen also a lot of impuritys. Oxygen will always burn at higher temps. For me oxy air worked well for 90% of the cases unless it was around humid areas.
awesome
When I was in trade school we had a bernzomatic and couple oxy-acetylenes to practice brazing. I personally preferred the bernzomatic because I found it faster and less of a hassle... Are air-acetylene like berzomatics? I'm just wondering. If they're nothing alike, could you send a link to an air-acetylene one
I prefre turbo torches. Its not even “that” much slower. The wrap around flame that the Turbo torches do or whatever you explained is a big reason why I prefer them. 😊
Air acetylene is arguably faster because of that wrap around flame. As soon as it gets hot you can seal the whole joint in one go rather then having to move the flame and heat up the other side of the copper.
Super video
Love your vedios
How the heck are these videos made? What program!? Amazing!!
I use both and when we're doing big commercial copper I use both at the same time. We just replaced two 1-3/8 reversing valves and the two torches made very short work of it. Also we cut them off with cable cutters. DO NOT USE STOP LEAK....
A Trane virtual training video I just was in recommended propylene instead of acetylene. Ever used that?
Does anyone have a link on where I could purchase the Wetrag Heatshield?
cool video. im curious is there are similar videos on the regular tip vs rosebud. only time i dont use rosebud is if im on something super small like 1/4 in a tight spot. otherwise 3/8-2 5/8 im using rosebud.
Hey Garrett your Rosebud tip is that for air acetylene?
Where can I get the heatshield?! I don’t see anything online and I want one!
I like to try a rose bud tip with my air acetylene?
Air aceline for the win
Sir where's the I buy this।। Please send a link ,and i following the your channel to grow my knowledge,but somewhere I feel that in HVAC service somehow not much vavulable sector here's in India,,,,
I've used Mapp gas, air-acetylene, oxy-acetylene, and for the last 20 years, have used oxyfuel-gas. I do mostly commercial and find I need the precision and higher heat output of my current torch. That said, I would love to see a video about brazing in the wind and brazing large fittings, i.e. 1-3/8 to 2-1/8. Are there any tricks to keeping the torch burning in the wind? How do I know when I am reaching the upper limits of my torch size?
The manufacturer of the tip should have a guide on what size each tip can braze. A #0 will braze up to 1/2" and a #2 will braze up to 1"
AKA "Colateral Damage". Something a lot of technicians need to learn about and prevent. Installers too.
Just wanted to know what's your view on the cap n hook tip or other tips
I purchasing use the Captain Hook. It's nice at first, then I was having issues where the ports would clog and have erratic Flame. That's what I've heard in a clean environment.
I got a map can with turbo torch and I thought it would take me some time to get copper cherry red. Nope, it's quite fast, abt 10 seconds and it melts the brazing stick at 700 C. I feel like I will need simple prop-but with the turbo torch if i wanna efficiently solder with stay brite
Depends on the copper sizes
@@UltraHydrophobiccoat yes, true that. But also depends on the placement of wet rags. In any case, turbo torch really heats up copper sufficiently and its temp output can be lowered to levels oxy- setups can't step down to. Just my opinion based on few brazes ive done so far
@@taketinnn33 Thank you for sharing. I totally agree. I use Turbo touch with Acetylene whenever I have brazing job, but never tried Map. Does it generate higher flame temperature than Acetylene?
@@UltraHydrophobiccoat This I really don't know. I've only tried Acetylene with Oxygen versus map (propane mix for better perf) and turbo torch and I melt the brazing rod, which is 710 C ligament temp rated in under 10 seconds with the torch flame. Manufacturer of the torch claims max temp of the torch to be abt 2000 degrees celzius.
Where do you get the viper mats?
Yea I can't find it either
Can you use propane torch?
No. Not hot enough.
You can get away with mapp gas. It's quite slow to heat though