R134a vs R12
R134a vs R12
(OP)
I find that all R134a systems are not providing cold air as fast as older R12 systems. I remember R12 systems that would pump cold air withing seconds after start up. Is this true or am I imagining things?
TIA,
Leon
TIA,
Leon





RE: R134a vs R12
Michael
RE: R134a vs R12
RE: R134a vs R12
I'd be looking for a replacement too.
RE: R134a vs R12
I refuse to bite on that....
Best regards
pennpoint
RE: R134a vs R12
Armstrong Labs Report (can't link directly to the PDF, click on Toxicity Reports at the bottom of the page)
This report was removed from an AF website in '97, and that particular site disappeared in '99 (going by the internet archive).
RE: R134a vs R12
RE: R134a vs R12
Dan - Owner
http://www.Hi-TecDesigns.com
RE: R134a vs R12
And given that most people who use R134a use a containment system when exhusting it, should we care?
After all, we succesfully deal with far greater volumes of far more deadly gases on a regular basis.
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: R134a vs R12
_____________________________________
I have been called "A storehouse of worthless information" many times.
RE: R134a vs R12
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: R134a vs R12
CHEMICAL NAME: 1,1,1,2-Tetrafluoroethane
CHEMICAL FAMILY: Hydrogenated Fluorocarbon
FORMULA: F,CCH2F
SYNONYMS: Fluorocarbon-134a, H134a, HFC 134a, HFA 134a, 134a, R134a
RE: R134a vs R12
Best regards
pennpoint
RE: R134a vs R12
Page no.2 in the link below gives you a comparison of R12 and R134a. Page no. 18 gives you inhalation toxicity.
h
No living organism (or precisely cell) can't survive in a pure oxygen environment. Check the MSDS at,
http://www.uigi.com/MSDS_gaseous_O2.html#SECT11
RE: R134a vs R12
h
B.E.
RE: R134a vs R12
DuPont invents and patents Fluor carbon type refrigerant gasses. They have exceptional performance and DuPont makes a lot of money while establishing market dominance and manufacturing strength with extensive plant.
Patents expire, but previous investment in plant, manufacturing experience and market dominance still provides a good profit.
Others enter market and gradually improve and begin to undermine prices and take market share.
DuPont starts work on alternative, develops and patents some.
DuPont announces that it has discovered that Fluor carbon damages ozone layer and we will all be seriously damaged by increased exposure to UV light, but hey, just ban Fluor carbon. No worries about repercussions because we have safer alternatives (which just happen to be patented.
Anecdotal evidence, directly to me from industry insiders suggested that Fluor carbon does in fact damage the ozone layer and allow in extra UV light, but extra UV light converts more oxygen to ozone, and thus self heals, although at a somewhat lower level at equilibrium.
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: R134a vs R12
Cynical to the last,
Rod
PS: FYI---The 91 Dodge diesel and the 85 BBC motorhome I converted to R 134 five or six years ago are still working just fine. I see little or no difference in performance from when they were R 12.
RE: R134a vs R12
I think we both have a reputation for calling it as we see it, even at our own peril.
Co-incidental, (or luckily) we most often have a similar opinion or view.
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: R134a vs R12
Michael
RE: R134a vs R12
RE: R134a vs R12
RE: R134a vs R12
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: R134a vs R12
RE: R134a vs R12
In the old R12/minerial oil systems, moisture intrusion really only meant you needed to replace the dryer, pull a vacuum on the system and refill. If a system was abused to the point of dessicant breakdown, little more than a dryer, compressor, and system flush might be needed.
RE: R134a vs R12
RE: R134a vs R12
Simple alcohol, works really good for clean-up as many brake shops found out long ago.
To the point: We all are beyond R-12, R-22 and have replacements for both now, stop lamenting and move on, your best bet is to provide the best service to your customers now and in the future for brakes...same goes for AC...
Best regards
pennpoint
RE: R134a vs R12
With most of the older R-12 systems gone, converting and oil compatibility issues are way in the past (except for some of the old vehicles sitting in my driveway that still use R-12 but I squirrled away enough to outlast them, I hope).
rmw