EVR yog ib qho ncaj qha lossis servo ua haujlwm solenoid valve rau cov kua, nqus, thiab cov roj kub kub nrog cov fluorinated refrigerants.
EVR li qub tau muab ua tiav lossis raws li cov khoom sib cais, piv txwv li lub cev valve, coil thiab flanges, yog tias xav tau, tuaj yeem txiav txim cais.