EVT high pressure range is a direct or servo operated solenoid valve specially designed to fit into CO2 transcritical refrigeration systems.They can be applied in following applications:EVT 1.2 direct operated for oil return, pressure equalization/relief control, high pressure hot gas bypass/dump and hot gas defrost.EVT 2.0 and 3.0 servo operated for high pressure hot gas bypass/dump and hot gas defrost application.EVT valves and coils are sold separately