EVR waa waalka solenoid ee tooska ah ama servo ku shaqeeya ee dareeraha, nuugida, iyo khadadka gaaska kulul oo leh qaboojiyayaal fluorinadeed.
EVR valves waxaa loo bixiyaa dhamaystiran ama sida qaybo gaar ah, tusaale ahaan valve body, gariiradda iyo flanges, haddii loo baahdo, si gaar ah ayaa loo dalban karaa.