Shanghai Hengyu Molecular Sleve Co., Ltd, is an ISO 9001.2000 certified company, specialized in desiccants’ production with its advanced equipments and manufacture technology. Main products including Molecular sieves, Activated Alumina, Silica Gel and Catalysts, among which PSA-O2 (VSP), XH series and some nickel, silver and Pd catalysts are the most popular required by the customers.