View Full Version : artificial oils

21-04-2002, 09:55 PM
Dear friends:
whats physical property of chemical result that has been caused of mixing artificial oils(polyesterin) with wet air?
How can we be so sure about their safety during functional system?
thanks in advance.

22-04-2002, 11:37 PM
Polyolester oils are significantly more hygroscopic than mineral oils. Thus you will get more moisture into the system with a polyolester oil exposed to wet air than you would with a mineral oil exposed to the same amount.

The most significant drawback is the formation of acids during the high temperature compression process, which will tend to cause further chemical reactions within the system such as copper plating, and insulation breakdown on the motor windings. If you suspect that the oil was exposed to wet air, you should take a sample and have an analysis done by a lab. The filter drier manufacturers have redesigned some of their filters to combat this likelihood.

24-04-2002, 04:57 PM
Dear Sir Dan :
Thanks for your attention and good technical advice .
Is that true some type of them may get a bit plastic form after absorbing water ?
and what temps are avoided at discharge line ?
best regards

24-04-2002, 09:01 PM
Sir Dan eh........you never told us......did you meet the corgis?

Frosty:D :D :D

Preston Roy Powell
17-06-2002, 03:02 PM
Well what happens is the oil turn to acid and the acid eat the winding of the compressor. If the system has a leak it needs to be found if some one repaired a leak and didnot change the drier or oil correctly it needs to be changed. THe new oil you have from 15 to 45 minutes to seal the system this also depends on the weater and humidity.