... whose final viewpoint isComprehensive performance of EDV micro-dispersion valve tray hasapproached advanced international standards.Main Features: Valve top canopies, ... Directional valve, Bubble promoter, Non-revolving valve Improved tray deck connectionAdvantages over conventional trays: Higher capacity by 40% ... , Coking, PX plant, Aromatic extraction, Methanol plant tower plate- EDV Valve