Results 1 to 18 of 18
Thread: residue R404a
-
24-11-2006, 02:27 PM #1
residue R404a
Hello, experts
I use for work R404A from cylinders.
Each cylinder contain 10.9 kg of refrigerant.
In liquid phase its components R125 / R143a / R134a is in ratio 44% / 52% / 4%
When I charge refrigerator ,
amount and pressure of refrigerant in the cylinder will decrease ,
and once some components will vaporize in cylinder,
and ratio between components get broken.
So a substance in the cylinder will not be R404a.
In view of the aforesaid let me ask some questions:
How much kg of refrigerant I can take from cylinder ?
What should I do with residue blend ? Can I use it for charging?
Thanks for any advice
-
24-11-2006, 02:45 PM #2
Re: residue R404a
Hi Tralex
With all blends you should be charging systems with liquid and not vapour from the bottle. The vapour in the bottle will always be their unless you put the bottle in a freezer each time before use(and then you'll still get vapour).
None of us can do anything about the gas % mixture in the vapour and so liquid charging is the only way to try and get the full % mix out.
Kind regards
Lrac
-
24-11-2006, 06:20 PM #3
Re: residue R404a
LRAC is correct, and for your last question you should not use more than 90% of weight of the refrigerant content.
-
24-11-2006, 07:36 PM #4
-
24-11-2006, 09:53 PM #5
-
24-11-2006, 11:27 PM #6
Re: residue R404a
Use R507 (AZ50)....no worries then as its an Azeotrope.
-
25-11-2006, 12:46 AM #7
Re: residue R404a
Walmart, Winn-Dixie, Publix use R404a as their HFC. This covers about 75% of the supermarkets in the Southeast USA. It cannot be all that bad.
-
25-11-2006, 09:45 AM #8
Re: residue R404a
Electrocool is right. 507 is much better than 404 and it doesn't have the problem of oil carry over.
-
25-11-2006, 11:44 AM #9
Re: residue R404a
Thank you gentleman.
How you recovery residue refrigerant?
-
25-11-2006, 05:36 PM #10
-
25-11-2006, 07:56 PM #11
-
26-11-2006, 07:23 PM #12
-
26-11-2006, 08:02 PM #13
-
26-11-2006, 08:06 PM #14
-
27-11-2006, 07:53 AM #15
-
30-11-2006, 02:58 AM #16
Re: residue R404a
what if you fire a bit o nitrogen in there and charge only liquid? Then technically all the refrigerant aut to be forced back in only as liquid phase due to artificial pressure the nitrogen induces. Thus you should get no fractioning occurring.
-
03-12-2006, 12:51 AM #17
Re: residue R404a
Electrocool is right. 507 is much better than 404 and it doesn't have the problem of oil carry over.
-
03-12-2006, 12:18 PM #18