EcoRenovator  

Go Back   EcoRenovator > Improvements > Tools
Advanced Search
 


Blog Register 60+ Home Energy Saving Tips Recent Posts Search Today's Posts Mark Forums Read


Reply
 
Thread Tools Display Modes
Old 05-11-15, 11:33 AM   #1
Daox
Administrator
 
Daox's Avatar
 
Join Date: Aug 2008
Location: Germantown, WI
Posts: 5,471
Thanks: 1,110
Thanked 367 Times in 298 Posts
Default I got this tank of R134a...

I hit up a few rummage sales last week, and while doing that, I found a place giving away some free stuff. Amongst the pile, I found this:




My questions are basically these: Does R134 go bad? Can I hook this up to a heat pump and use it? It still has the plastic on the valve top, but its obviously old. It says 30 lbs on it, but it does not feel like 30 lbs. Any idea what is this worth if I would try to sell it?

I do have one project I can use it on. I have a friends car that I'm repairing the A/C on. I started it last year, but it was in fall and we put it off until this spring. I'll end up replacing the high pressure side hose and adding more refrigerant. However, I think I'll have a ton left over. I also have a bunch of new 12oz cans to do this job. Details here:

http://ecorenovator.org/forum/geothe...-line-car.html

Attached Thumbnails
Click image for larger version

Name:	IMG_20150507_165034.jpg
Views:	1168
Size:	92.1 KB
ID:	5247  
__________________
Current project -
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
&
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Last edited by Daox; 05-11-15 at 12:04 PM..
Daox is offline   Reply With Quote
Old 05-12-15, 10:29 PM   #2
NiHaoMike
Supreme EcoRenovator
 
NiHaoMike's Avatar
 
Join Date: Oct 2008
Location: Austin, TX
Posts: 1,127
Thanks: 15
Thanked 247 Times in 233 Posts
Default

It should last "forever" in storage.
__________________
To my surprise, shortly after Naomi Wu gave me a bit of fame for making good use of solar power, Allie Moore got really jealous of her...
NiHaoMike is offline   Reply With Quote
Old 05-13-15, 10:26 AM   #3
Daox
Administrator
 
Daox's Avatar
 
Join Date: Aug 2008
Location: Germantown, WI
Posts: 5,471
Thanks: 1,110
Thanked 367 Times in 298 Posts
Default

Thanks NiHaoMike. I kinda figured it should stay good. Perhaps Ill give it a shot on the car project.
__________________
Current project -
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
&
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Daox is offline   Reply With Quote
Old 05-13-15, 12:13 PM   #4
AC_Hacker
Supreme EcoRenovator
 
AC_Hacker's Avatar
 
Join Date: Mar 2009
Location: Portland, OR
Posts: 4,002
Thanks: 303
Thanked 712 Times in 532 Posts
Default

Quote:
Originally Posted by Daox View Post
...Amongst the pile, I found this...
There are some R134a dehumidifiers showing up in thrift stores...

You could use this stuff for some kind of hack project, DWH, etc. and you wouldn't need to worry about R290.

-AC
__________________
I'm not an HVAC technician. In fact, I'm barely even a hacker...
AC_Hacker is offline   Reply With Quote
Old 05-14-15, 02:26 AM   #5
gtojohn
Journeyman EcoRenovator
 
gtojohn's Avatar
 
Join Date: Jul 2014
Location: Austin, TX
Posts: 314
Thanks: 39
Thanked 50 Times in 45 Posts
Default

I believe I saw 30# for about $80 at costco last year. You could weigh it, subtract 3# for your container.
gtojohn is offline   Reply With Quote
The Following User Says Thank You to gtojohn For This Useful Post:
Daox (05-14-15)
Old 05-14-15, 01:28 PM   #6
MN Renovator
Less usage=Cheaper bills
 
MN Renovator's Avatar
 
Join Date: Nov 2010
Location: Minneapolis, MN
Posts: 938
Thanks: 41
Thanked 115 Times in 89 Posts
Default

As long as it hasn't been contaminated by someone pumping something else into it you should be all set unless the tank corrodes or the valve leaks, you should be good as long as the gas stays inside. I'm glad this stuff doesn't go bad because there's a 30# container of Dupont Freon22 that I expect will continue to increase in value over time until/unless people stop using R22 as these systems become less common as they get replaced with other units or people start using more retrofit refrigerants but I figure the market will remain there unless the EPA decides to outlaw its use and require a retrofit refrigerant or system replacement.
MN Renovator is offline   Reply With Quote
Old 05-14-15, 10:42 PM   #7
mechanic
Apprentice EcoRenovator
 
Join Date: Aug 2014
Location: Saskatchewan, Canada
Posts: 117
Thanks: 10
Thanked 16 Times in 12 Posts
Default

I believe we sell 134a for $20-$25 a pound here in sask, it's just about the only refrigerant I work with. You should be ok as far as contamination as when your reclaiming you generally use the sturdier dual valve tanks... But if your unsure you can figure it out with a temperature reading, a pressure reading, and this chart
R134a Refrigerant Pressure Temperature Calculator
mechanic is offline   Reply With Quote
The Following User Says Thank You to mechanic For This Useful Post:
Daox (05-15-15)
Old 06-14-15, 01:19 AM   #8
wdrzal
Lurking Renovator
 
Join Date: Jan 2011
Location: Pa.
Posts: 12
Thanks: 0
Thanked 2 Times in 1 Post
Default

Quote:
Originally Posted by MN Renovator View Post
As long as it hasn't been contaminated by someone pumping something else into it
You can't there is a check valve built in that only allows refrigerant out so these tanks can't be used as recovery tanks.

Walt
wdrzal is offline   Reply With Quote
The Following 2 Users Say Thank You to wdrzal For This Useful Post:
Daox (06-15-15), stevehull (12-18-16)
Old 06-23-15, 08:48 PM   #9
AC_Hacker
Supreme EcoRenovator
 
AC_Hacker's Avatar
 
Join Date: Mar 2009
Location: Portland, OR
Posts: 4,002
Thanks: 303
Thanked 712 Times in 532 Posts
Default

Quote:
Originally Posted by wdrzal View Post
You can't there is a check valve built in that only allows refrigerant out so these tanks can't be used as recovery tanks.
Walt
Haven't worked with these tanks you speak of, but I have used the little green camping gas bottles for recovery.

In the propane gas bottle, there is a small spring-loaded ball valve that keeps the gas in.

In a propane torch head, there is another one, that is located at the end of the part of the torch head assembly that inserts into the gas bottle. When you screw the torch head down, the tip pushes against the ball in the bottle and makes possible the release of propane.

So I performed a ball removal, and removed the ball in the torch assembly, which allowed me to have two-way access to the little tank when the torch assembly was screwed in.

I also removed the torch head and brazed on a Schrader valve (remove valve core before brazing), so it would be compatible with the rest of my equipment. I still have the torch needle valve, which is important to 'blank off' the canister before you unscrew the torch head, and has also been very useful when I used the gas bottle for other operations.

After my recovery operation, use the needle valve to blank off the bottle, then I unscrew the modified headless torch assembly, and the ball valve that is in the green bottle makes the seal.

It's actually easier to make and use than it is to describe.

But it works great.

-AC
__________________
I'm not an HVAC technician. In fact, I'm barely even a hacker...
AC_Hacker is offline   Reply With Quote
Old 06-24-15, 08:26 AM   #10
Daox
Administrator
 
Daox's Avatar
 
Join Date: Aug 2008
Location: Germantown, WI
Posts: 5,471
Thanks: 1,110
Thanked 367 Times in 298 Posts
Default

Next question. How do you meter how much refrigerant you've put into a system with a large tank like this? For instance, the Saturn I'm working on calls for 20oz. Could I weigh the tank before/after or is there an easier way?

__________________
Current project -
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
&
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Daox is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 03:27 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Ad Management by RedTyger
Inactive Reminders By Icora Web Design