the difference between TEV and EEV?

[david2008]

Hi there, what's the application difference between TEV and EEV?

[chemi-cool]

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]

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]

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/Spo...-20_092008.pdf

[david2008]

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/Spo...-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]

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]

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]

Thanks Phase_Loss.

[icecube51]

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.

Ice