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#4771400 - 05/29/18 05:07 PM How much refrigerant is in a can?
joegreen Offline


Registered: 03/10/13
Posts: 756
Loc: NY
So i am in the process of buying refrigerant to fill my vehicle. It seems like an easy enough question but i couldnt find any info online. Lets say i have a can of r134a and it says net weight 12oz. Does that mean the can contains 12oz of refrigerant or does the can and refrigerant weight 12oz? Im just trying to figure out how many cans of r134a i need.


Edited by joegreen (05/29/18 05:08 PM)
_________________________
1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le

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#4771401 - 05/29/18 05:09 PM Re: How much refrigerant is in a can? [Re: joegreen]
kschachn Offline


Registered: 12/26/05
Posts: 9393
Loc: Upper Midwest
Originally Posted By: joegreen
So i am in the process of buying refrigerant to fill my vehicle. It seems like an easy enough question but i couldnt find any info online. Lets say i have a can of r134a and it says net weight 12oz. Does that mean the can contains 12oz of refrigerant or does the can and refrigerant weight 12oz? Im just trying to figure out how many cans of r134a i need.

http://www.businessdictionary.com/definition/net-weight.html
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#4771414 - 05/29/18 05:22 PM Re: How much refrigerant is in a can? [Re: joegreen]
mrsilv04 Offline


Registered: 12/08/06
Posts: 8267
Loc: Illinois
You have to read the can. Some will have a small amount of oil in them as well.

I have a 12 ounce can in the garage, which is labelled as containing 11.3 ounces of R-134a, and .7 ounces of refrigerant oil.
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#4771415 - 05/29/18 05:23 PM Re: How much refrigerant is in a can? [Re: joegreen]
rollinpete Offline


Registered: 03/20/17
Posts: 451
Loc: West Ma.
Usually under the hood some where, it will tell you how much you need, for your system.
Got to go from there.
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#4771428 - 05/29/18 05:42 PM Re: How much refrigerant is in a can? [Re: joegreen]
slacktide_bitog Offline


Registered: 03/20/08
Posts: 6151
Loc: USA
"net weight" is the weight of just the contents inside the can smile

"tare weight" is the weight of the container itself, and "gross weight" is the "net"and "tare" weights

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#4771589 - 05/29/18 08:00 PM Re: How much refrigerant is in a can? [Re: rollinpete]
joegreen Offline


Registered: 03/10/13
Posts: 756
Loc: NY
Originally Posted By: rollinpete
Usually under the hood some where, it will tell you how much you need, for your system.
Got to go from there.
I need 1lb 14oz. Im just trying to figure out how many cans i need to buy is all
_________________________
1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le

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#4771591 - 05/29/18 08:02 PM Re: How much refrigerant is in a can? [Re: kschachn]
joegreen Offline


Registered: 03/10/13
Posts: 756
Loc: NY
Originally Posted By: kschachn
Originally Posted By: joegreen
So i am in the process of buying refrigerant to fill my vehicle. It seems like an easy enough question but i couldnt find any info online. Lets say i have a can of r134a and it says net weight 12oz. Does that mean the can contains 12oz of refrigerant or does the can and refrigerant weight 12oz? Im just trying to figure out how many cans of r134a i need.

http://www.businessdictionary.com/definition/net-weight.html
Thanks i understand now
_________________________
1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le

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#4771593 - 05/29/18 08:02 PM Re: How much refrigerant is in a can? [Re: slacktide_bitog]
joegreen Offline


Registered: 03/10/13
Posts: 756
Loc: NY
Originally Posted By: slacktide_bitog
"net weight" is the weight of just the contents inside the can smile

"tare weight" is the weight of the container itself, and "gross weight" is the "net"and "tare" weights
Thanks
_________________________
1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le

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#4771594 - 05/29/18 08:02 PM Re: How much refrigerant is in a can? [Re: joegreen]
joegreen Offline


Registered: 03/10/13
Posts: 756
Loc: NY
Looks like ill get 3 cans and put 2.5 cans in.


Edited by joegreen (05/29/18 08:03 PM)
_________________________
1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le

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#4771650 - 05/29/18 08:39 PM Re: How much refrigerant is in a can? [Re: joegreen]
tomcat27 Offline


Registered: 06/25/09
Posts: 3564
Loc: Chicago, IL
Is your system totally empty and do you have a vacuum pump?
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#4771752 - 05/29/18 10:09 PM Re: How much refrigerant is in a can? [Re: joegreen]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
There's usually enough reserve in the accumulator to handle that last 1/2 a can
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#4771754 - 05/29/18 10:12 PM Re: How much refrigerant is in a can? [Re: joegreen]
spasm3 Offline


Registered: 05/30/10
Posts: 8646
Loc: North Carolina
It seems to me that the old r12 system worked well even when undercharged or overcharged a bit. It seems to me that with the r134a systems , there is a fine line between undercharged and overcharged.
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#4778394 - 06/05/18 05:28 PM Re: How much refrigerant is in a can? [Re: tomcat27]
joegreen Offline


Registered: 03/10/13
Posts: 756
Loc: NY
Originally Posted By: tomcat27
Is your system totally empty and do you have a vacuum pump?
Yes the system is totally empty. I have a gauge set and a vacuum pump. Anyway the a/c is all repaired now. thanks
_________________________
1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le

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#4778446 - 06/05/18 06:29 PM Re: How much refrigerant is in a can? [Re: spasm3]
nthach Offline


Registered: 01/02/04
Posts: 3895
Loc: California
Originally Posted By: spasm3
It seems to me that the old r12 system worked well even when undercharged or overcharged a bit. It seems to me that with the r134a systems , there is a fine line between undercharged and overcharged.

Depends on the system as well, new AC systems are very sensitive to oil and refrigerant charge. That old GM accumulator and orifice tube system can tolerate some overcharge.

If you charged in with all 3 cans, I don't think an extra 5 oz of R-134a will hurt anything. You lost some while changing out cans, purging the charging hose and gauges.

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