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lana
22-05-2010, 06:28 AM
Hi everybody,

Has anybody used a cleaning agent in a refrigeration system to clean the contamination of synthetic oil? i.e. remaining oil in the system and piping.

I found some liquid in the Internet but I am not sure how they work. Of course the manufacturer claims that they are perfect but I would like to know your practical experience. My other concern is the liquid itself, how can the liquid be removed from the system?

Cheers

tbirdtbird
22-05-2010, 11:24 PM
In our shop we use so-called Brake cleaner. This is actually a product from the automotive industry to clean brakes on cars. This is actually R-113, and comes in spray cans and gallons in this country. We use it to flush and then pipe thru OFN to flash it off. It flashes very rapidly. We always use the type in the green can. I have no experience with the type in the red can.
http://www.acehardwaresuperstore.com/crc-brakleen-15-oz-p-67129.html?ref=42&osCsid=c0e706c81f3e7779b26991d284f74a53

sneep
23-05-2010, 12:42 AM
In our shop we use so-called Brake cleaner. This is actually a product from the automotive industry to clean brakes on cars. This is actually R-113, and comes in spray cans and gallons in this country. We use it to flush and then pipe thru OFN to flash it off. It flashes very rapidly. We always use the type in the green can. I have no experience with the type in the red can.
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Actually it's not.
http://www.crcind.com.au/catalogue.nsf/(MSDS)/BRAKLEEN%20NON%20CHLORINATED%205084%20ncr/$FILE/MSDS.pdf
The acetone will soften the varnish on the motor.
Think: http://www.youtube.com/watch?v=gXjKYuD_AlY or even http://www.youtube.com/watch?v=ZtdtvsngxbY&feature=related since itís composed of Acetone, Naphtha, LPG and Isopropyl alcohol.
Rx-11 flush:
http://www.nucalgon.com/products/totalsystemprotect_rx11flush.htm

lowcool
23-05-2010, 01:04 AM
hydrocarbon based solvent cleaner are easily removed but sometimes it can be time consuming,they are flammable but i would like to see a product that can clean as good as it does without this drawback.pass it through your pipework twice the last flush being with new solvent and you will have a relatively pristine system.its much cheaper than advertised flushing systems and doesnt require circulating pumps etc,nitrogen and some nous are all that are required

tbirdtbird
23-05-2010, 03:26 AM
The CRC Brakleen posted above is the type in the red can which we don't use. Only the green can.

sneep
23-05-2010, 06:23 AM
The CRC Brakleen posted above is the type in the red can which we don't use. Only the green can.

5084. Same as link you had. Link wrong?

lana
24-05-2010, 05:22 AM
Thanks everyone for your reply.

Does this stuff clean the oil or only the debris?

lowcool
24-05-2010, 05:56 AM
according to crc it degreases with no residue left as does solvent cleaner.when i get a chance i will compare prices as it is im paying around $70 inc for 20 litres.quite cheap i thought.

tbirdtbird
24-05-2010, 03:18 PM
OK the green can CRC brake cleaner we use is the chlorinated type. Red can is totally new formula, we don't use it for refer. Other companies also make the chlorinated type such as Gunk.

tbirdtbird
13-07-2011, 05:46 AM
Just an important note that we are no longer able to get brake cleaner formulated with R-113, so our "brake cleaner trick" is out the window, don't do it

ssk7899
18-07-2011, 08:32 AM
Dear Sir,

You can go with R12 Refrigerant which is banned but its a very good Cleaning Agent for Oil Residues and CTC Slovent is a very good cleaner.

Fri3Oil System
18-07-2011, 10:37 AM
The best agent to clean is the same refrigerant the installation uses, since it is miscible/soluble with the oil inside. Thus, an HFC would suit. As you know, Lana, you can recirculate the refrigerant in cycles of injection and suction, to bring all the oil out of the pipes and syphons. There's no need to release any gas, or use any consumables.

Regards,

Nando.