TXV/TEV's and EEV's - Overclock.net

Maytridy · 05-26-09

Hey guys,

Couple of questions:

Does anyone know where I can buy TXV's or EEV's?
Can TXV's be adjusted to open or close based on custom temperatures?
How do I get an EEV to open based on a temperature sensor? Do I need some kind of signal converter?

[TXV = Thermostatic Expansion Valve = TEV]
[EEV = Electronic Expansion Valve]

Thanks!

Maytridy · 06-03-09

no love for TXV's, huh?

NoL · 06-03-09

Let's see...
1) Yes, Johnstone, ebay, plenty of places. Simply gotta look and find one in the temp range and capacity you want.
2) No, TXV are by nature self regulating. They attempt to create a a constant superheat through measurement and self adjustment.
3) Alot more then that, EEV's are incredibly expensive, and require full control systems to measure all the variables of a system, not just the evaporator temperature.

Maytridy · 06-04-09

ah, thanks for the reply!

in regards to question #2, I know that TXV's are self regulating, so I'm wondering can I set the TXV to maintain a specific superheat other than what it was manufactured to maintain?

thanks again and +1 for the help

NoL · 06-04-09

That's what the big screw is for.

Maytridy · 06-05-09

ok, haha, sorry for being a noob, never seen one in real life before. thanks! +1

NoL · 06-05-09

It's not a lot of adjustment you should know. And your best not touching it at all.
If you want "adjustability" you use a CPEV, turn the screw on that to change and control the suction pressure. Bit expensive though. $40-60 for a good one.

Maytridy · 06-05-09

ok, we'll continue this discussion via pm. thanks so much! it has been so hard to find someone who knows about this kind of stuff

zomgiwin · 07-04-09

... this is for the los fuegos chiller isnt it? :P
i am so interested in that build!

Maytridy · 07-04-09

Haha, you're crazy about that build

I found a good TXV by the way and it should be here soon. for everyone else, stay tuned in my Los Fuegos build log (sigged) for more info!

06-03-09	#3 (permalink)
NoL Extreme Cooler Join Date: Jul 2007 Posts: 625 Rep: 120 Unique Rep: 82 Trader Rating: 0	Let's see... 1) Yes, Johnstone, ebay, plenty of places. Simply gotta look and find one in the temp range and capacity you want. 2) No, TXV are by nature self regulating. They attempt to create a a constant superheat through measurement and self adjustment. 3) Alot more then that, EEV's are incredibly expensive, and require full control systems to measure all the variables of a system, not just the evaporator temperature. __________________ http://images.tribe.net/tribe/upload...3-47d49073bb79 Send me your food.

06-04-09	#5 (permalink)
NoL Extreme Cooler Join Date: Jul 2007 Posts: 625 Rep: 120 Unique Rep: 82 Trader Rating: 0	That's what the big screw is for. __________________ http://images.tribe.net/tribe/upload...3-47d49073bb79 Send me your food.

06-05-09	#7 (permalink)
NoL Extreme Cooler Join Date: Jul 2007 Posts: 625 Rep: 120 Unique Rep: 82 Trader Rating: 0	It's not a lot of adjustment you should know. And your best not touching it at all. If you want "adjustability" you use a CPEV, turn the screw on that to change and control the suction pressure. Bit expensive though. $40-60 for a good one. __________________ http://images.tribe.net/tribe/upload...3-47d49073bb79 Send me your food.

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TXV/TEV's and EEV's

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