I-EVR yivalve ye-solenoid ethe ngqo okanye ye-servo yolwelo, ukufunxa, kunye nemigca yerhasi eshushu enefriji ezinezikhenkcezisi.
Iivalvu ze-EVR zinikezelwa ngokupheleleyo okanye njengamacandelo ahlukeneyo, oko kukuthi umzimba wevalve, i-coil kunye neeflange, ukuba ziyafuneka, zinokuodolwa ngokwahlukeneyo.