thx for the info. is the oil sep design of mine correct?
can i purge with refrigerant? say R22? its cheap here...
where do you find copper wol?
thx
thx for the info. is the oil sep design of mine correct?
can i purge with refrigerant? say R22? its cheap here...
where do you find copper wol?
thx
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My R22/CO2 Cascade Project
No, do not purge with refrigerant. Not only its bad for the environment but its illegal.
If you want to die, purge with refrigerant. While brazing, the flour reacts to hydrogen fluoride ... you smell it directly and it "bites" in your eyes! DON'T TO THAT! It will serious hurts you!Originally Posted by marru
There is a hydrocarbon you can use as a purging gas which everyone has it at home, but I'm not allowed to say this here...
Officer Waltwhat do you think?
i will have my co2 next week, i think i'll use that...
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Thats great. I use it too.
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Please use CO2 if you can, brazing with R290 isn't reccomended, ever. Most people have enough trouble maintaining the flame from their torches, introducing a fireball is a bit too muchDon't ever purposely vent CFC's, that has always been my biggest concern as individuals can get R22 for cheap but they don't purchase the recovery equipment to safely recover it, cheaper for them to just vent
R22 is an HCFC......Please use CO2 if you can, brazing with R290 isn't reccomended, ever. Most people have enough trouble maintaining the flame from their torches, introducing a fireball is a bit too much
OHH, what a huge different...
Don't vent refrigeriants exept pure hydrocarbons....
ok, finishing the case body, and the final placement... last thing to do is brazing joints and oil sep, finishing the case and done...
some pics updates...
got my CO2 today, damn its heavyy (arround 50-60kg) and arround 1.6m tall....
its me and co2
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Very nice, can`t wait to see results
Nitrogen gas is much cheaper to buy thus too purge with.
you will need a regulator with that bottle.It should have a cap on during transport unless chained or strapped upright while in use.There are severial thousand psi in that bottle,falling or being pulled over during use is not a good thing.
The Laws of Thermodynamics say:
Zeroth Law: "You must play the game."
First Law: "You can't win."
Second Law: "You can't break even."
Third Law: "You can't quit the game."
Do you wanna Play Thermodynamics ????????I forgot "you must"
wdrzal, there is about 800psi, not more I think. CO2 isn`t so much high pressure gas like ethylene or something. But for sure he needs regulator.
Last edited by LukeXE; 04-13-2007 at 04:28 AM.
tomorrow i'll buy the regulator... nitrogen is not expensive but the bottle rent is way to pricey in here.. i dont have those cash.... so i think i'll just purge with co2...
ok, there are three regulator i found here that can be use, nitrogen reg, co2 reg and acetylene, all of them can hold till 3500psi. all in almost the same price but what do you think the best one?
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Co2 would be the best.
Acetylene will be a different thread because it's a flammable gas (anti-clockwise thread).
Nitrogen regulator if it has the same fitting as the co2 bottle could also be used. If the nitrogen regulator will fit and it has more flexibility (ie higher output pressure etc), it may be a good choice because you can use it on different bottles if need be.
The one which has the bigger output pressure range.
As Luke said.
Usually the CO2 regulators will have a 100PSI max outlet pressure, acetylene will be very low pressure (maybe 20PSI).
I'd use a nitrogen regulator but make sure you have a inlet stem which fits the CO2 bottle. If at a later time you can afford a nitrogen bottle then you'll just need a new inlet stem to fit the nitrogen bottle.
Commonly the inlets and outlets of a standard regulator are 1/4" NPT thread (but you can check if it's different in your country), so to fit a new stem just use 3 - 4 turns of PTFE tape and screw in with a spanner.
Whichever regulator you choose make sure the outlet pressure can go to at least 250PSI, this will let you charge a system safely when static but will also let you pressure test the system also
Tom
"What will become of us, will we evolve"
your standard acetylene regulator is 15psi max ........normal is usually below 8psi
red line/danger is between 15 & 30psi on secondary side, it starts at 15psi ,you should never go over that.
Be aware of this danger just because the gauges have a pressure marked on them does NOT mean they belong on that regulator,especially in the used market
Last edited by wdrzal; 04-13-2007 at 05:16 AM.
The Laws of Thermodynamics say:
Zeroth Law: "You must play the game."
First Law: "You can't win."
Second Law: "You can't break even."
Third Law: "You can't quit the game."
Do you wanna Play Thermodynamics ????????
i'll pay attention on it for sure.... thx for your advice and info, i think i just go with CO2 reg... the price is around US$39...
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My R22/CO2 Cascade Project
when buying co2 regulators check the secondary side(low pressure) as some used for drinks are too low
The Laws of Thermodynamics say:
Zeroth Law: "You must play the game."
First Law: "You can't win."
Second Law: "You can't break even."
Third Law: "You can't quit the game."
Do you wanna Play Thermodynamics ????????
Question here: Can I use CO2 for pressure/leak-testing?
...is no longer working as an assistant HVAC/R-installer...
But, is still blasting 20000 songs of real Rap
Yes
Tom
"What will become of us, will we evolve"
But as I said before All regulators have a max inlet pressure and max outlet pressure,whether they have 1 gauge or 2 or none at all. So be sure to know primary or high side limit and secondary or low side limit.
Also know the difference between single stage and two stage regulators. I'll let you look that up ,you'll probable learn more while looking
Last edited by wdrzal; 04-13-2007 at 06:46 AM.
The Laws of Thermodynamics say:
Zeroth Law: "You must play the game."
First Law: "You can't win."
Second Law: "You can't break even."
Third Law: "You can't quit the game."
Do you wanna Play Thermodynamics ????????
Thank you. Don't see why I would buy nitrogen at all, when I can use CO2 for all measures; purging, testing and coolingYes
Tom
Edit: But if I charge to 15bar, and then when I'm finished want to let the gas out again, could it then form dry-ice, or am I completely off here?
Last edited by Big SturL; 04-13-2007 at 07:07 AM.
...is no longer working as an assistant HVAC/R-installer...
But, is still blasting 20000 songs of real Rap
i'm a bit confuse here...do you have any pics of good co2 regulator? especially to everything that you exlplained... thx
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My R22/CO2 Cascade Project
If you're in a normal room (~20C) you'd need about 57Bara to liquify CO2, so the CO2 in the system would be gas state at 15Bar. As you vent it, it will cool on expansion a bit but it wont get near to triple point
//Edit - Just realised that venting into atmospheric pressure would go straight to triple point if it was pure pressurised liquid at any time (it isnt anyway so it doesnt matter)...
Make sure you have good ventilation if you vent a system after CO2 pressure test, it's heavier than air as well which can make it lie around a bit longer.
Andre - It looks like any other good quality regulator
Tom
Last edited by SoddemFX; 04-13-2007 at 11:48 AM.
"What will become of us, will we evolve"
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