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Thread: Upside down TEV's
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20-06-2006, 11:46 PM #1
Upside down TEV's
Hi Guys,
I seem to remember that a few months ago there was a thread about tev's and whether they would work if located upside down.
Well i have got to go to a site tommorow with an upside down valve.
Can anyone point me in the direction of the thread so i can see what the conclusion was
Regards
Fatboy
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21-06-2006, 04:09 AM #2
Re: Upside down TEV's
I would imagin they wotk just fine no matter what way they are facing, I have one running upside down with no problems.
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21-06-2006, 08:06 AM #3
Re: Upside down TEV's
Hi The MG Pony,
In Theory i know they should work but its one of these jobs that is just a process of elimination.
I seem to remember someone having problems with one located upside down, poss oil collecting in it.
Anyway, going to look at the job this morning to see whats going on
Regards
Fatboy
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21-06-2006, 09:03 AM #4
Re: Upside down TEV's
oil conducts pressur just as well as gas, so again, it is odd to think it would be a source of problem, Perhaps moisture could build inside?
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21-06-2006, 09:10 PM #5
Re: Upside down TEV's
You may install it in any direction, just make that the bulb faces downwards
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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22-06-2006, 08:26 AM #6
Re: Upside down TEV's
Normally (99,99 % of the cases) this won't be a problem.
But everything that may not get into the expansion valve (dirt, small metalic particles, ... ) will get trapped in the valve. If it's a valve with internal pressure equalisation, chances are these particles get on the diaphragm and cause stress ... (causing cracks ....).
Of course these particles shouldn't go to the expansion valve because you have a filtre drier upstream and most of the TEV have an internal filter, but....
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22-06-2006, 10:39 AM #7
Re: Upside down TEV's
Originally Posted by Peter_1
Yep, I second that.
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04-09-2006, 10:22 PM #8
Re: Upside down TEV's
will not pose any problem. i see it in bus a/c systems and no problem at all. gravity has nothing to do with the operation of the vavle.
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05-09-2006, 03:11 AM #9
Re: Upside down TEV's
I wish I had read this post yesterday. I spent a lot of time and effort mounting a valve in the upright position, because I believed you could not mount them upside down.
By the way, after reading this post, I went to my truck, dug through the garbage pail, and found the unread instructions from my valve... and read them. According to Sporlan you can mount their valves in any direction.Last edited by Sledge; 05-09-2006 at 03:12 AM. Reason: typing error
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05-09-2006, 10:58 PM #10
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06-09-2006, 11:28 AM #11
Re: Upside down TEV's
If all else fails .... read the instructions.
If it still doesn't work, do what it says!
.
________
Honda GB500Last edited by Argus; 07-02-2011 at 09:25 AM.
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06-09-2006, 07:19 PM #12
Re: Upside down TEV's
Just spoke with Sporlan yesterday on this topic. Any position OK, just make sure it's not at a low point in the system as it might collect oil making the valve very sluggish.
Kevin
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06-09-2006, 07:54 PM #13
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06-09-2006, 08:11 PM #14
Re: Upside down TEV's
Hi
At a guess
"READ THE F*C*I* MANUAL"
Bernard
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06-09-2006, 08:17 PM #15
Re: Upside down TEV's
The position of the distributor is important, not that of the TEV.
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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06-09-2006, 10:59 PM #16
Re: Upside down TEV's
Thanks Bernard, got it in one ! (Sorry Frank)
Brian - Newton Abbot, Devon, UK
Retired March 2015
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07-09-2006, 01:15 AM #17
Re: Upside down TEV's
TEVs work on a pressure diff, not on gravity!
Last edited by birdman; 09-09-2006 at 06:08 PM.
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07-09-2006, 09:16 AM #18
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15-10-2006, 10:33 PM #19
Re: Upside down TEV's
Just a possible reason for NOT fitting them upside down..... corrosion.
Brian - Newton Abbot, Devon, UK
Retired March 2015
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16-10-2006, 07:12 PM #20
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16-10-2006, 07:24 PM #21
Re: Upside down TEV's
Yep, AHU with three TXVs side by side. They all look a bit crappy. Just condensation causing the problem plus a bit of salt air no doubt.
Hoping to get the OK to change them at the same time as I change the rusted filter/driers.. Just love working near the seasideBrian - Newton Abbot, Devon, UK
Retired March 2015
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02-11-2006, 12:24 PM #22
Re: Upside down TEV's
Hi guy,
the pressure is not the problem in this case, as you said it will transmitt it easily. The bottleneck is the temperature!!!!!!!!!!!! The trapped oil does have the temperature of the refrigerant in the liquid line this does influence the bulb and the working bahavior of a TXV.
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04-11-2006, 03:52 PM #23
Re: Upside down TEV's
Just a possible reason for NOT fitting them upside down..... corrosion."If Hannah was an air handler, I would be a condensing unit so I could open her TXV and pump my refrigerant through her coils." - a HVAC friend of mine
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04-11-2006, 06:13 PM #24
Re: Upside down TEV's
Not a bad idea that, rather obvious now that you mention it
Brian - Newton Abbot, Devon, UK
Retired March 2015
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25-02-2007, 11:59 PM #25
Re: Upside down TEV's
As an OEM case mfr. We prefer to mount them upside down. This way SH can be easily adjusted if need be. Of couse we"re working very clean . I can't say there have been tev problems in fact they're quite the problem free componenant
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14-03-2007, 06:54 PM #26
Re: Upside down TEV's
fit any way u like as long as sensing bulb is below halfway on suction
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15-03-2007, 12:23 PM #27
Re: Upside down TEV's
Peter_1 brings up an important point in that the bulb should be mounted in the cap tube elevated position. This allows the liquid portion of its charge to be stored in the bulb rather than in the powerhead where it can make the action of the valve sluggish.
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