Idemitsu developed polyvinylether(PVE) as an innovative refrigeration oil for hydrofluorocarbon(HFC) refrigerant systems.PVE is non - hydrolytic in nature, is a superior lubricant, can be solubilized in process fluids and is miscible with HFC refrigerants.These performance attributes can both directly and indirectly contribute to the total cost of a refrigerant system.One such advantage of PVE is that water content can be regulated to within a few hundred parts per million so that filter dryers are not required for most HFC air conditioners. As Idemitsu has demonstrated the superiority of PVE in field tests, original equipment manufacturers(OEMs) worldwide have begun to adopt PVE in the commercial production of HFC refrigerant systems.