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View Full Version : the difference between TEV and EEV?


david2008
30-08-2009, 07:55 PM
Hi there, what's the application difference between TEV and EEV?
chemi-cool
30-08-2009, 08:06 PM
TEV controlled by the thermostatic charge and EEV controlled by electronics.

EEV is more expensive.

They both do the same job -injecting refrigerant into an evaporator of any kind.
david2008
30-08-2009, 08:16 PM
TEV controlled by the thermostatic charge and EEV controlled by electronics.

EEV is more expensive.

They both do the same job -injecting refrigerant into an evaporator of any kind.

Thanks chemi-cool.
TEV has a bulb to get the SH, then to control valve. Can EEV get SH? how EEV control flow rate?
chemi-cool
30-08-2009, 08:28 PM
EEv is controlled by electric servo motor.

The motor gets its commands from electronic control which collects its date from sensors .
You can read about it here:

http://www.carelusa.com/e2v.htm

http://www.parker.com/literature/Sporlan/Sporlan%20pdf%20files/Sporlan%20pdf%20100/100-20_092008.pdf
david2008
30-08-2009, 08:42 PM
EEv is controlled by electric servo motor.

The motor gets its commands from electronic control which collects its date from sensors .
You can read about it here:

http://www.carelusa.com/e2v.htm

http://www.parker.com/literature/Sporlan/Sporlan%20pdf%20files/Sporlan%20pdf%20100/100-20_092008.pdf

Good Information! Thanks.
For a refrigeration system, if it has a TEV or EEV, does it need Solenoid vale? In what situation, a solenoid valve is needed?
Phase Loss
30-08-2009, 09:10 PM
often times with an EEV with stepper motors you do not need a solenoid valve because the EEV can close 100%.


We also have a supermarket "Fresh and Easy" (tesco) who use a danfoss EEV that is powered from 120 or 208 volts. It is not a stepper motor but actually pulses 100% open and 100% closed through an orfice.
Phase Loss
30-08-2009, 09:12 PM
Good Information! Thanks.
For a refrigeration system, if it has a TEV or EEV, does it need Solenoid vale? In what situation, a solenoid valve is needed?

Also if your circuit is using a TEV and is on a rack/pack. you will need a solenoid valve either on the liquid line or suction line so you can obtain defrosting by stopping the refrigeration flow.
david2008
30-08-2009, 09:24 PM
Thanks Phase_Loss.
icecube51
03-09-2009, 09:50 PM
often times with an EEV with stepper motors you do not need a solenoid valve because the EEV can close 100%.

i don't want to put money on that. not the first time i have seen a technician covert in oil because of a valve was not fully closed.:D

Ice