Hello, everyone,
Who can supply the file of the electronic expansion valve such as:modulating magnetic valve, stepper motor valve, and pulse-width-modulated valve to me ? It is better including the priciple, the configuration and the appilication and so on.
Because recently I am collecting the valves for refrigerant flow control. But the information of the electronic expansion valve is very old and little in the book of the refrence which I have found now.

thank you very much !

Crystal