Solenoid Valve on suction side of Evoperator

Hi

After building condenser myself which is working very good for me, I planned further to automate system.

For that I need solenoid valve to be installed just before expansion valve of Evaporator to control room temperature. (Currently we are doing manually by looking at temperature gauges)

Please suggest me which solenoid valve would do best for me.

My system is Ammonia R717, I am using KC compressor giving me about 285 KW, and I have 7 units of Evaporator each around 76 KW

Regards
Salman Khan