Oxy Acetylene Brazing, Torch Adjustments- Reducing Flame, Oxidizing Flame, Neutral Flame

I show the Reducing Flame, Neutral Flame, and Oxidizing Flame for Oxy-Acetylene Brazing of Copper Tubing. The Reducing Flame is also known as the Carburizing Flame and I show it with a Black Background. Supervision is needed by a licensed HVACR Tech while doing this as Experience and Apprenticeship garners Wisdom and Safety. Flashback arrestors can be added to the base of the handle where the hoses connect and at the tank regulators.
Tools Used In The Video
Uniweld Cap-N-Hook and #2 Tip Oxy Acetylene Torch Setup- amzn.to/2STp3Fe
Ameriflame Oxy Acetylene Torch Setup #1 &#2 Tip- amzn.to/2SRm3JF
#2 Tip for Oxy Acetylene Torch- amzn.to/2SPDaeD
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⚠️ Disclaimer:
Information in this video is intended for educational purposes only. Any work related to the topics in this video should be performed by licensed technicians or by apprentices under the supervision of licensed technicians. AC Service Tech LLC is not responsible for any possible damages or injuries caused by the use or misuse of any information provided. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
#hvacr #hvacr #hvactrainingvideos #hvactraining #hvactraining101 #acservice #acservicetech
#brazing #oxy #torch #reducing #flame #Acetylene #copper #lineset #coppertubing #tube #carburizing
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Shop through Amazon! Your Purchases through Amazon provide a means for channels such as mine to earn advertising fees from all purchases after clicking through. Prices are the same as normal.

[@acservicetechchannel]

Support- www.patreon.com/acservicetech Tool List- www.amazon.com/shop/acservicetech For those that are looking for the tools used in the videos: (Linked Below) Uniweld Cap-N-Hook and #2 Tip Oxy Acetylene Torch Setup- amzn.to/2STp3Fe Ameriflame Oxy Acetylene Torch Setup #1 &#2 Tip- amzn.to/2SRm3JF #2 Tip for Oxy Acetylene Torch- amzn.to/2SPDaeD Cap-N-Hook Tip for Oxy Acetylene Setup- amzn.to/2MbhpUk Air Acetylene Torch setup amzn.to/2aQalsb 15% Silver Brazing Rods amzn.to/2gVLyLc Nitrogen Regulator amzn.to/2bXdR5f Nitrogen Flow Meter amzn.to/2brvoBg Yellow Jacket Refrigerant Gauge Set amzn.to/2aenwTq Refrigerant hoses with valves amzn.to/2aBumVI Yellow Jacket Gauge set & hoses amzn.to/2vLVkV9 Yellow Jacket 4 Port Manifold w Hoses amzn.to/2BkuGIq FieldpieceSMAN360 Digital Manifold Set amzn.to/2BdoaD4 FieldpieceSMAN460 Digital Manifold Set amzn.to/2nB4Fe6 Fieldpiece ST4 Dual Temp Meter amzn.to/2wc1ME3 Compact Ball Valve for Refrigerant Hose amzn.to/2KUisW8 QuickDisconnect 90 for refrigerant hose amzn.to/2MMtVcg UEI DL479 Multimeter with temp sensor amzn.to/2jtsUbJ JB 6 CFM Vacuum Pump amzn.to/2nqbvo8 Appion Blue 3/8" to 1/4" Vacuum Hose amzn.to/2uYlVyc Appion Red 3/8" to 1/4" Vacuum Hose amzn.to/2uYg6Ro Appion Valve Core Removal Tool amzn.to/2uYr8WL Yellow Jacket 1/4" by 1/4" hose amzn.to/2umtcod CPS Vacuum Micron Gauge amzn.to/2v1nM3O Supco Vacuum Micron Gauge amzn.to/2v1JRiA RectorSeal Bubble Gas Leak Detector amzn.to/2ckWACn UEI DL389 Multimeter amzn.to/2xAdaJf Digital Refrigerant Scale amzn.to/2b9oXYl Accutrak VPE Ultrasonic Leak Detector amzn.to/2nFYKVe Imperial Kwik Charge 535-C amzn.to/2uipEI6 FieldpieceSDMN6 Dual Manometer Pump amzn.to/2jyK5Ka Supco Magnet Jumpers amzn.to/2gS4h6z 2 pairs of alligator clips- amzn.to/2CtIL5z JB Vacuum Pump Oil amzn.to/2mGrlXy General Tools digital Psychrometer amzn.to/2cSHsi1 Fieldpiece SDP2 Digital Psychrometer amzn.to/2nniMVR Ratcheting Service Wrench amzn.to/2dGV4Nh Appion G5 Twin Recovery Pump amzn.to/2dGSEyr Irwin Wire Stripper/Cutter/Crimper amzn.to/2dGTj2V Other tool links can be found in the video description section. Shop through Amazon! Your Purchases through Amazon provide a means for channels such as mine to earn advertising fees from all purchases after clicking through. Prices are the same as normal- www.amazon.com/shop/acservicetech

[@vjnblnum2303]

If lots of instructors were as knowledgeable and instructive as you go about teaching, many of us young technicians would surpass the level we're at now, hence we're hocked to your channel because we know there's lot more stuff to know and the right way to execute them.

[@acservicetechchannel]

I really appreciate your comment Vjn! Thanks!

[@rafaelrodriguez172]

I work with a friend of mine as a helper and we been doing lots of rough ins for the past two weeks and I decides today to take the kit home and start practicing my welding I have never weld before im exited for it and I have all I need but the knowledge even doe my friends explained it but you gave me more confidence to do it .

[@Wavyysav]

@@rafaelrodriguez172brazing***

[@Wavyysav]

Ever move up from being helper?

[@EdenFL97]

This man makes it look easy! First time on a torch and its hard adjusting. SO much going on with hearing the pops and the noise of the flame... Always fun with 15 other students in the class making all the same mistakes! Thanks for the video!

[@justpigbat5398]

I just joined an HVAC company with a tankard plumping knowledge and basic sheet metal work and advanced electrical knowledge. I no brazzong experience but understand the concept but this video filled In all the theory on every question I had on the very nuances of oxy/acetatyln setups and brazing. I absolutely subscribed and thank you for sharing your knowledge

[@dgonzo222]

Comprehensive. Been in the field for five (5) months and this was the most digestible description yet. I’m green as can be. Thank you.

[@BridgeWater94]

How’s it been going

[@raydiaz9218]

Im a new lead tech this video helps tons thanks a lot bro.

[@rodgraff1782]

I know you don’t want to produce black soot, but lighting the torch with both valves open is very dangerous. You can have a flashback in the hoses, that sounds like fire crackers going off. They are small explosions in the rubber line and will end up back at the regulators. You will then have a fire with rubber, oxygen, and acetylene burning together, making thick black smoke. I used to light my torches like that all the time until one day I had a flashback and fire at the very large tanks. This was in a multi million dollar computer room, and shut down operations for several major credit cards. I was told by the regulator manufacturers rep never to light my torches like that again, and we were required to install flash back arrestors on all torches after that. I agree with everything else you presented. I think you covered all the bases.

[@teacherlynn671]

Turning on the Oxygen a little and then the Acetylene is just genius. I always turned Acetylene on first got the soot and then adjusted. Also, I was always taught to use a neutral flame not the reducing flame. Looks like the Teacher taught the Teacher. Great job!!!

[@acservicetechchannel]

Anything from neutral to reducing can be used but yeah usually reducing, thanks Teacher Lynn!

[@resurgensix]

Great insights. Avoiding the black smoke was a mystery until now. Thanks!

[@HVACGUY]

As always great video. I’d recommend, after turning on acetylene, reversing the service wrench, and leaving it on the acetylene tank. Makes it much easier to turn off in case of an emergency.

[@fredbroom5050]

Excellent video. Exactly what I wanted to know about the flame type and reasoning behind it. Quickly covered the basics, and mentioned tip size.

[@acservicetechchannel]

Thanks Fred!

[@DixonSyder420]

I’ve been brazing for a couple years. Wont say how many because I’m embarrassed all my stuff is always in order. I learned how to braze with that exact setup with a pegged acetylene tank gauge my other gauge broke off yest on my acet manifold and I had to get a new one and had no earthly idea what pressure they needed to be on……..thank you for my otj training for today

[@DixonSyder420]

And I’ve sweated a lot of copper and always went by look and sound. I can’t believe I was today years old when I learned how to properly adjust them 😂

[@douglas787]

I feel like the Turbo Torch is the Oxy-Acetylene torch with training wheels. It doesn't work quite as well as Oxy-Acetylene, but if the tech has limited skill or experience, the Turbo Torch is a lot more forgiving and easier to use.

[@acservicetechchannel]

Turbo torch will certainly work and is easier to use for sure, thanks douglas787!

[@deybysp1]

I agree with you 100%

[@Ashroyer86]

Turbo torch will make you go deaf. Main reason I didn't buy one.

[@meatcreap]

Best video on this topic that I've seen. I've watched MANY. Thanks!!

[@DouglasEdwards1981]

Thank you for this find! Just made my brazing life with my Oxy-Acet torch a lot easier.

[@wilfredosilva9476]

As always very clear explanations and to the point I start with a new company soon and they use oxy/Acetylene. I've been in the business for 20 years and have only always used and a B tank for any torch work that I've done. So I was thankful for your brief explanation on how to set up check.

[@damirdze]

Black smoke is an indication of the acetylene flow. If the gas flow is lower than the flow of flame it may mean the flame enter the hose. That is why I would not use the oxy first. You open the acetylene and increase untill the smoke dissapers and that tells the flow is ok.

[@joeshumo9457]

Turn the oxygen bottle on slowly while not looking at the gauges in case they burst. Then fully open to set the valve back seat to so it closeS properly . Always make sure regulators are turned out. I was taught for brazing to set the ace at 7 and the oxy at 11 without running the gas. I always start the ace only and then the oxy. Turn the oxy off first in all cases. Never start you torch next to the tank. Never breathe brazing fumes. Use a carbon filter mask.

[@acrepairnearme]

Excellent continuation of the previous video. This format gives me a whole perception of the question. BIG thank you. Really important helping tips.😀

[@acservicetechchannel]

Thanks a lot Tapch MC!

[@anwarhossain9730]

bro your teaching style surprise me, i love it. Lots of love from Bangladesh.

[@acservicetechchannel]

Thanks a lot havey duty!

[@dand3975]

I clear the lines when finished oxy-acetlene cutting, I don't back off the regulators, a old timer welder told me that would ware the diaphrams in the regulators. Always double check both tanks are shut off. Tanks should be transported in up right position, and strapped down so they can not be tipped over on it's side.

[@jamalbadhafari2634]

Nice and easy to learn. 👍👌

[@acservicetechchannel]

Glad you think so!

[@superiorcomfortheatingairl3373]

I prefer using a Turbo Acetylene torch over the Oxygen-Acetylene Torch but this was a very good informational video, there was stuff I didn’t know👍

[@acservicetechchannel]

I use both myself and yeah a Turbo Torch will do it too, thanks Superior!

[@argenismoreno8838]

I always learn something important with you. Thank you so much

[@acservicetechchannel]

Glad you enjoyed. Thank you for your support!

[@andreak001]

Thanks for answering my question about why the heck is my flame so dirty when I open my torch, lol, and the poping noise!😅

[@hollicesmall4769]

He had the perfect flame when you have to add more oxygen in order to shut it down mean you had the perfect amount of gas and oxygen mixed having to add more oxygen inorder to shut down the gas to avoid the pop good video taught me alot

[@stacymilligan5761]

Three thumbs up great explanation

[@raidersfan643]

The best explanation i have seen so far .

[@padilla7019]

Great HVAC teaching

[@acservicetechchannel]

Thanks Luis!

[@GotchaplumberGotchahvac]

Thank you for another practical video.

[@acservicetechchannel]

Glad it was helpful!

[@acheatdoctor]

Thank you for your educational videos, you’re top notch! I started an hvac business less than a year ago and your videos have helped me on my journey so far

[@acservicetechchannel]

Awesome to hear, thanks Paul!

[@DavidHernandez-gt9bo]

Nice explanation “ practice makes perfect “

[@acservicetechchannel]

Thanks David!

[@chrisdeanndavison3626]

I've never used this setup but I know a lot of guys like it, however, I'll stick with my Turbo Torch. I've used it for 25+ years and see no reason to switch. This just seems so much more complicated. To each their own.

[@RayRay-nb7tn]

You are very welcome.

[@vedantmanjarekar8983]

Thanks 👍

[@thisis5123]

I’m practicing brazing right now with a setup I just purchased. 60cu.ft Oxy / B Acetylene tank. Harris 510 HD torch outfit which has Harris #5 brazing tip and also came with a Harris 1AC- 2 piece cutting tip with oxygen lever. First time taking the braze tip to the 3/4acr and elbow it blew a hole right through in about 2 seconds flat with a reducing flame. The second attempt and beyond it looks as though the joints were fully sealed visibly with the 15% silver braze rods, but it still seems as though I may have over heated them- if that’s even possible. I’m still practicing before I have to get it right on a project. Actually I had success easier at first with the high preheat cutting tip without pressing the oxygen level of course.

[@dimitritrotsiuk3897]

Great video with a lot of explanations!!! Thank you

[@acservicetechchannel]

Thanks Dimitri!

[@juliancruz6231]

Thank you for making this so simple!

[@acservicetechchannel]

Glad it was helpful!

[@tak2933]

Thanks for sharing

[@acservicetechchannel]

Thanks Tak 293

[@andriusmaslauskas3578]

Thanks for the instructive video. Great stuff.

[@carlosreynoso776]

Great Video ...

[@acservicetechchannel]

Thanks!

[@valerianlohrke7373]

perfect video thank you so much for sharing your knowledge Sir!!!

[@acservicetechchannel]

So nice of you

[@valerianlohrke7373]

@@acservicetechchannel you are most welcome Sir 👍

[@kyawlin6411]

thanks for teaching

[@jaydee2620]

I like using map for the 3/8 line and oxy acetylene for the 7/8s

[@Kevin-ib4gv]

Thanks for making these videos, they are really helpful and very well done, but I do have to disagree with your oxy-acetylene start/stop procedure. If you search every manufacturers torch manual, they ALL say to turn oxygen off first, then acetylene. Then in BOLD letters, they ALL say "In the event of an emergency, TURN OXYGEN OFF FIRST". The reason is that if you have a leak from the torch handle acetylene valve, and have the oxygen still flowing, you CAN burn acetylene right back into the acetylene tank, and in order to burn inside the handle/hose/tank, acetylene needs oxygen to do so. Turning off the oxygen first prevents a possibly deadly event from ever happening. Same hazard with turning your oxygen on first when lighting up. Oxygen off first also prevents the "popping" sound you hear, and that pop is not "blowing things clear" of the tip, but blowing things back into the nozzle where it clogs the tip with soot. If you are quick with the oxygen after lighting the acetylene first, soot is held to a minimum, and if outdoors, it doesn't matter at all.

[@yongweiwang2386]

I like his video. but have to say I agree with you about the problems that you mentioned . the right procedure also in the textbook.

[@bowhunter928]

Man out here its new tanks every other week, never checking leaks, using a lighter instead of an igniter, no gloves, no eye protection. Never adjusting the pressures on the tanks either.

[@Luv2punish_]

Thank you for the video. Very informative

[@user-ng4dx1sv4s]

Hats 🎩 off for you Sir !!!

[@acservicetechchannel]

Thanks Thomas!

[@geraldrascon1041]

Thanks man appreciate the video your good people.

[@kimmethyazzie2548]

Put the sparker down as you adjust the knobs.

[@jwessonsr7503]

When u say reducing flame you mean carbonizing flame right. 1by 2 by etc carbonizing flame for soldering/brazing, neutral flame for brazing/welding, oxidizing flame for cutting bending And destroying stuff lol. When the outter cone is 2 x the length of the inner cone that's called a 2x carbonizing flame. Use this flame if your not sure of your ability to avoid pokeing holes in pipes. Sure hope you have a back flow preventer on there instructing folk to turn on oxy b4 turning on ace. Ace is the 1st thing u turn on and the 1st thing u turn off. Have you ever seen and unstable ace bottle explode. This is what happens when the acetone becomes unstable in the bottle from laying down and not being stores in the upright position. If this were to happen with oxy being turned on 1st BOOM. They probably won't live to tell the tale. Understand the soot thing. Lack of oxy. It's not near as bad with a clean torch tip. Lady's and gents, never turn the valve on an ace tank more than 1/4 turn. In an emergency you have to be able to turn it off quickly. Ok to turn oxy tank valve all the way open. Set ace at 6psi and oxy at 8psi. This will get you through just about any job. When you get urself proficient at brazing with various tip sizes typically 0 thru 3, step up to a rosebud tip. It's like using a turbo torch on steroids. Lol. No disrespect meant here. I've seen bad things happen to inexperienced people playing with a rocket ship in a cart. Happy welding 😁

[@janwerner6882]

Wow, thank you..my teacher never explained it this well..and they told us to keep acetylene under 10 and oxy under 45!!!..so much bad information..at least they said the part about only turn acetylene 1/4 turn

[@Mr_Daddy1980]

You mean carburizing flame....not carbonizing 🤦

[@jwessonsr7503]

@@Mr_Daddy1980 yeah that one 😁👍

[@jwessonsr7503]

@@Mr_Daddy1980 hey man, I. Can spell Technician, But I are one 🤪 haha

[@jodanypaul9382]

Good job man I like the information is very helpful

[@supercharged2414]

I just can't see the flame differences on my 17 inch laptop. Would be even worse trying to see it on a phone. Good instructions but am afraid i will use a neutral flame and burn holes thru my copper tubing. First attempt and burned hole thru 3/8 copper tubing . Very frustrating.

[@brantleymoore9670]

Thankyou

[@acservicetechchannel]

You’re welcome 😊

[@victorvillafane252]

Thank you for all your videos you are a monster and a good master to appreciate that

[@acservicetechchannel]

That is what my wife says my face looks like when I wake up, ha ha, Thanks Victor!

[@waltherherrera67]

Excelente muy bien Gracias

[@samuelvalenzuela4541]

Very good

[@acservicetechchannel]

Thanks Samuel!

[@vladekvladinov5753]

I finally suscribed. You sold me.

[@acservicetechchannel]

Ha ha, thanks Vladek!

[@vivekkolvekar193]

Very nice information

[@ejohnfall]

Great video memory refreshing thank u

[@acservicetechchannel]

Thanks ejohnfall!

[@zomblake]

Great video, thanks for posting! I would like to note one thing though - I know for cutting torches, all the big torch manufacturers recommend killing the oxygen first, then the fuel gas to make sure the line and valve are purged of any soot and close fully. I don’t think it matters too much, but they do take the time to say do it this way so maybe it does matter? Idk. Thought I’d be that annoying guy in the comments and mention it at least. Also, I remember my dads old brazing torch tip had the psi stamped on it but my new smith tip says MW205 and no psi mark. Do they not do that anymore or is the 205 some sort of code that corresponds to pressure settings?

[@RayRay-nb7tn]

Thank you for the video.

[@acservicetechchannel]

Thanks a lot Ray Ray, always enjoy your comments!

[@JuanTodoli]

Cristal clean explanation. Thanks :)

[@acservicetechchannel]

Thanks a lot Juan!

[@briekhnaa]

Nice informative video 👍.

[@Sc19869]

So awesome

[@mooniedizzel6443]

Good info.

[@zyggzag4154]

Subscribed! Thank-you!

[@andrewwolf8652]

Awesome🤙😎

[@acservicetechchannel]

Thanks

[@phillipjoy8191]

Good job 😜

[@acservicetechchannel]

Thanks Phillip!

[@Alex-yk6he]

Great info!

[@acservicetechchannel]

Thanks Alex!

[@briekhnaa]

Please comment on other brazing options like using LPG / butane alone. Thank you.

[@hvactechpr7872]

awesome!! Thanks again!!

[@acservicetechchannel]

Thanks Alexander!

[@hvactechpr7872]

👍 I have a channel also check it out share and subscribe just passed 100 subs

[@stevenmoomey2115]

That’s a “MC” Acetylene Tank and a “M” Oxygen Tank. Does anyone know what “MC” and “M” stand for? Also I always use a Solid Wrench for my Acetylene Tanks, when the Wrench is on the Valve, it means the Valve is “Open” Hung over the Regulator, means the Valve is “Closed.” I put a Wire Cinch tie through the Smaller Wrenches, a Short Looped Chain through the bigger Wrenches, so I can hang them.

[@jreynaiv]

It’s safe to say you braze in the perfect setting or else I could see everything around that flame catching 🔥.

[@BritishBulldog4]

Thanks for this! I have been installing new split systems for about 7 years but haven't had to do brazing, apart from once in training years ago. Now I have the tools and want to practice so I can change a compressor, for example. Very informative. Interestingly another KZbin video said you want a neutral flame for brazing copper pipe, you say reducing flame... Does it make a difference how big the pipe is, because in that other video it was like 1" or so. I'll be working with 1/2", 3/8". or 1/4". Thanks!

[@acservicetechchannel]

Actually the length away will determine how much heat you put on the copper so I couldn't really tell you how close. Around 1 to 2 inches for brazing and then maybe out to 3" for crowning the joint at the end. Practice is the key, thanks and you can use anywhere from a neutral flame to a reducing flame but I think a reducing flame gives more control, thanks

[@veronicasofia7544]

@@acservicetechchannel I like neutral flame which both gases mixed together, just a thought .

[@joshuawilson7629]

a textbook would say neutral flame just for the sake of consistency of heat I think, but if you are going to be working on joints that small and you are a beginner I don't see how using a reducing flame to get the hang of things would hurt you. just make sure you get that silver solder to commit to capillary action and sweep your flame across the joint to ensure penetration. I think you'll be doing fine in no time.

[@robertmunguia250]

You happen to have a link just for the tote? Carrying stand?

[@brandonle4930]

Just curious why this torch don't have check valve or flashback arrestor on the handle or regulator?

[@randymack1782]

35 years ago with my training, was trained by old masters in torch welding, I still prefer to use torch to weld, but now learning HVAC, but torch is torch, never leave wrench off tank! & put away that ratcheting one, accidentally leaving it on to open & if need to close during emergency could cost precious time, use the old school figure 8 wrench that you can slap with hand quickly to shut it off. i do not like adjusting gauge without a flame, very dangerous try that with big tips, you will regret it! when you strike it to light & see a big fireball, NOPE! light first, hold torch safe direction pointing away from tanks, & adjust regulator to 5-7 psi, your preference for running pressure. you open oxy first? thats a good way to get a flashback, to have flame ignite inside torch, then you will see black smoke rolling out, & it whistling, VERY DANGEROUS! and another reason to be able to cut acetylene off quickly, ALSO WHY NO FLASHBACK ARRESTORS????? you do like me on having torch pointing to the left, but most important find position to get comfortable with, & excellent on shutting it off, acetylene first, for oxygen to blow it out, then oxygen.

[@123hooterman]

Yeah my take was that you light the acetylene first because the oxygen is the catalyst. The acetaline won't combust without reaching open atmosphere first. If you add oxygen in the very beginning your risking flashback. You do get that black stuff everywhere though. Not blowing myself up is more important though.

[@rodgraff1782]

@@123hooterman If you don’t want the black smoke, just open the acetylene a little more. I had a bad flashback,by lighting with the oxygen on, and it blew up the hoses and caused a fire back at the regulators. I almost thought I was going to die, because they were very large tanks. Luckily I got it shut off, but everyone around me ran. After that, we installed flashback arrestors on all of our company torches, and were told never to light our torches like that again.

[@Kingvrofficial]

Thanks for the most important life saving tip. Thanks for taking time to share it. So let me repeat it DO NOT CRACK OXYGEN FIRST, ALWAYS ACETALINE FIRST . RIGHT?

[@OldPittsburgh]

Why do none of these videos mention flashback arrestors? Do you find these to not be necessary?

[@rodgraff1782]

You especially need them if you’re going to light your torches with both valves open.

[@teacherlynn671]

Thank you but First, I did not see where it said that the UEI DL479 also came with a temperature sensor. Second, I do love the looks of the Fieldpiece ST4 and do you have videos on that. Perhaps I could buy one for the class and use your videos to teach from. But I do want the UEI if it has the temperature sensor or do I have to buy that seperate?

[@acservicetechchannel]

The DL479 comes with a temp sensor. It should say it in the "included components" section. Look up "acservicetech ST4 Calibration" Video or some of the newer refrigerant charging videos, thanks Teacher Lynn!

[@electricboogie709]

Love it!

[@acservicetechchannel]

Thanks Electric Boogie!

[@onemoreboat]

You use a #2 tip in the video. Is that the preferred tip for brazing copper lines? What is the advantage of the #2 vs #0 for this application?

[@ApartmentMaintenance]

The #2 tip is basically the most used torch tip in the HVAC industry for brazing residential/light commercial systems with 3/8", 5/8", & 3/4" copper line sets.

[@carlossosa2940]

Can I use mc tank with b turbo torch I was told that I could damage my turbo torch by using mc tank instead of using b tank ?

[@user-ri4od1pv8c]

Hi is this type of oxy acetylene kit suitable for Size C bottles? Im from Australia and the smallest bottle here is what they called size C

[@DanO181919]

Can you show us how to braze in some line sets? Thank you!

[@acservicetechchannel]

I would like to soon, thanks Danny! Have you checked out the air acetylene ones in the "brazing with nitrogen" playlist? I put a full installation in there which was 3 videos total, thanks

[@zyggzag4154]

I think I'm wrong but, at 1:45 when you said counterclockwise, didn't you go clockwise instead? I

[@whit6282]

I always set my gas pressures at 5 and 10 but i just realized uniweld states to. use a 5 and 5. Is there any significant differences in doing so?

[@erdalkuzay5535]

About safety rules first acetylen then oxygen is opened and before closing first oxygen then acetylen is closed. But in your video not to have fume residues you prefered to do the opposite. Could you explain this sequence if am wrong. Because I made a research on safely using torch and findings shows as I write in here. Many thanks for invaluable lessons.

[@acservicetechchannel]

No prob, we can't have all that carbon dust in the house and most people like to have that loud pop that blows out any residue from the end of the tip but if the flame was clean and you are only brazing copper, there won't be much of any so you don't have to scare the homeowner with the popping, thanks

[@Kevin-ib4gv]

@@acservicetechchannel Thanks for making these videos, they are really helpful and very well done, but I do have to disagree with your oxy-acetylene start/stop procedure. If you search every manufacturers torch manual, they ALL say to turn oxygen off first, then acetylene. Then in BOLD letters, they ALL say "In the event of an emergency, TURN OXYGEN OFF FIRST". The reason is that if you have a leak from the torch handle acetylene valve, and have the oxygen still flowing, you CAN burn acetylene right back into the acetylene tank, and in order to burn inside the handle/hose/tank, acetylene needs oxygen to do so. Turning off the oxygen first prevents a possibly deadly event from ever happening. Same hazard with turning your oxygen on first when lighting up. Oxygen off first also prevents the "popping" sound you hear, and that pop is not "blowing things clear" of the tip, but blowing things back into the nozzle where it clogs the tip with soot. If you are quick with the oxygen after lighting the acetylene first, soot is held to a minimum, and if outdoors, it doesn't matter at all.

[@rodgraff1782]

@@acservicetechchannel if you keep lighting you’re torch that way, like I used to also, one day, if your unlucky, you’ll get a pop alright, about a hundred of them in a second or so. If you don’t want the soot, just open up the ac a little more, and you won’t have that. Otherwise I thought your presentation was great.

[@Ashroyer86]

Is it possible to make a flame smaller than what naturally wants to come out at the recommended manufacturer pressures?

[@Adventure_fuel]

What are the tank pressures oxygen and acetylene?

[@richardd408]

He explains the pressures in detail. Watch again, there’s going to be a quiz.

[@darthvaider4347]

what part of the reducing flame do you use when heating up the tubing? middle flame or the outer flame cone?

[@19wael96]

how long can you use the torch on a neutral flame setting before you have to refill the tanks?

[@faresjildeh]

How much capacity is a stalin cylinder full for uniweld MC cylinder at KG unit

[@drdaver]

Hi. Thank you for the content. I am attempting to convert from r22 to mo 99 and replace the compressor. I have a split system. Can you recommend a list of your videos in order of process then i can follow your guidance exactly as needed?

[@acservicetechchannel]

I just have 2 videos on checking the refrigerant charge on a MO99 system that has been converted. I am finishing up a book that would help but it is not published yet. You could check out "acservicetech full recovery" "acservicetech full vacuum procedure" thanks

[@drdaver]

Thank you Sir

[@terryhestiicles7824]

When is the best time to put on your ppe

[@HowToDoitright]

Do I need to wear the welding glasses when brazing? I never see the HVAC techs wearing it during brazing. Is it needed?

[@asellee9817]

Brazing flame and melted metall are the source of UV radiation. This is what smart people say. If you look at it day by day for years, some surprising morning you might find yourself in difficulty to find your pass to the bathroom. Its for you to choose if to beleive it or no.

[@joeshumo9457]

It’s not UV it’s IR , infrared radiation. The dark safety glasses for brazing are needed for eye protection from debris. The dark tint is to allow you to see your work because it’s so damn bright. Not to protect you from radiation. This is dangerous to believe because brazing glasses cannot be used for electric welding . You will go blind if you think brazing glasses are for UV radiation. They are not.

[@5153flash]

I just bought a old setof tanks,similar to what you have and it came with a vintage torch head. Detroit L-45 is the model. It has a locking lever on the handle that allows gas flow. I have no idea how to use it. What is it for? A gas saver maybe? I have not tried it yet but it is a strange torch head. It cant be a cutting torch. Im confused.lol

[@haroldg4192]

Thanks, great info didn’t know this. Question, what’s your take on using a rosebud tip to braze ? I’m new to the trade by the way.

[@acservicetechchannel]

I think it is useful for get two sides at a time but really when you are used to a tip, you can do just about anything with it. It is fun to try different tips though but always practice first before using on a system to get the different technique and timing down, thanks

[@juniormartinez4470]

Could the Lincoln Port a Torch do the same as the uniweld?

[@ironeagletrike]

Have you compared to oxyacetylene to air air acetylene (like Turbo Torch)?