Variable orifice tube
- Thread starter Stresst
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
SunlitComet
OBS Jedi-Do Good
It alters the physical hole size to cretae the pressure difference. It is good if you need it but if it has to be manual set before install and you need to adjust it well you now what happens next.
---------- Post added at 06:03 PM ---------- Previous post was at 06:02 PM ----------
You do right? I mean your are an expert on the a/c system now right? I am just saying.
---------- Post added at 06:03 PM ---------- Previous post was at 06:02 PM ----------
You do right? I mean your are an expert on the a/c system now right? I am just saying.
SunlitComet
OBS Jedi-Do Good
I have no life to my times here are totally random
I have not personally had on in my hands yet so I do not know yet.
I have not personally had on in my hands yet so I do not know yet.
I have no life to my times here are totally random
You crack me up! lmao
I have not personally had on in my hands yet so I do not know yet.
I just stumbled upon this :
•5° - 12°F colder air (at hot idle)
•Reduced compressor load and extended compressor life
•Improved performance when converting from R-12 to R-134a
•Improved city fuel economy & emissions
•Improved performance in factory R134a systems
How it works
The Smart VOV (variable orifice valve) uses system pressure and refrigerant flow to move a metering piston relative to a fixed opening in the sleeve. The piston movement is resisted by an attached spring.
When idling at high ambient temperatures, the piston shifts to a smaller metering area similar to a TXV. This compensates for the reduced compressor output and increases the cooling performance. The Smart VOV also has a unique re-open feature which reduces compressor pressure for severe idle conditions.
At highway speeds, the Smart VOV operates on a large orifice. The net result is better performance than a TXV without the complexity or reliability concerns.
Unlike a TXV, which has constantly moving parts and small internal clearances, the Smart VOV is stationary during most operating conditions and has large internal clearances. Its low friction floating design insures smooth operation and extremely long life.
I released some freon a few days ago and to be honest it no longer gets down to 25, 26 degrees on the highway, It hovers around 30-32 but as soon as I get off the highway and say stop at the first light or stop sign it goes down to about 28 for about a minute or two before rising and this morning was a brisk 64 degrees. Even being that cool out I still didnt see the 26 degree temps that ive been seeing. Friggen weird!
My truck is more then comfortable im not complaining by any means I just dont like how it cools at idle or in traffic. Again its not bad but I need a couple really hot days to see where I am before I make a final decision.
A variable orifice tube is not adjustable by the user.
It is like an automatic pressure regulator of freon, in a way. Just google it and you will get a good explanation of how it works.
I had one in my 93 and it worked great.
If you have rear AC, there is no application for a VOT for the tahoes, only if you have front air only.
It is like an automatic pressure regulator of freon, in a way. Just google it and you will get a good explanation of how it works.
I had one in my 93 and it worked great.
If you have rear AC, there is no application for a VOT for the tahoes, only if you have front air only.
What would be the differance if it has rear air or not?
SunlitComet
OBS Jedi-Do Good
I saw that but did not think that might be the correct description or not.
I cant get an answer on that question yet. There is an AC parts house 1 mile from me, and even they didnt know.
I tried googling and didnt find anything either.
I am guessing that it messes with pressures or diverts freon to the rear, bypassing the front some.....Im not sure.
Mine works good enough even in 114 like today. Idle is not as good, but that will be fixed with efans as shown in my experiments.
SunlitComet
OBS Jedi-Do Good
Uh how about an extension to the system with another evaporator and it's own variable valve.
---------- Post added at 06:48 PM ---------- Previous post was at 06:46 PM ----------
Is that not the other way around because my 96 does not have a VOT option available?
---------- Post added at 06:48 PM ---------- Previous post was at 06:46 PM ----------
Is that not the other way around because my 96 does not have a VOT option available?
