residue R404a

[19730206]

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

 

[MintJulep]

The simple answer is, as long as you are charging liquid from the bottle, it generally doesn't matter.

If you are doing something that requires very exact performance from your equipment, there may be a small difference.

The refrigerant manufacturers have lots of technical data available on their web sites, and even more if you call the tech support center.

If you really need to know how the change will affect your equipment, you need to test your equipment.

 

[19730206]

Thank you MintJulep .
How you recovery residue refrigerant?

 

[pennpoint]

MintJulep is correct, You must always charge your equipment with liquid R-404a as opposed to gas charging. Otherwise you will risk fractionating the refrigerant and losing the refrigerants properties. Liquid charging is instructed on all documents I have seen regarding R-404a.

good luck

Best regards
pennpoint

 

[imok2]

Once you fractionate it you can't put it back togather again when you recover it , it requires a sofistacated process to do it, however you would recover it the same as any other refrigerant but you need to get a new bottle of refrigerant404A and be sure to add it in liquid form.

 

[tbedford]

The cylinders I purchase have liquid (red) and vapour (blue) valves for accessing refrigerant. If you don't have a liquid valve, that is a valve with a dip tube, the charging cylinder can be turned upside down to ensure liquid is in your charging hoses.
Once a blend separates, it is a very expensive propostion to determine the composition of the altered state. Economically, you should start with more liquid R404a.

t