Shuang Da Group (SDG) is now a medium-sized state-owned company from research, design, production and marketing. Now SDG takes on a new look after the successful reforming in 2004. SDG has four major subsidiaries; Jiangsu Shuangda Pump & Valve Co., Ltd, Jiangsu LiGong Pump Co., Ltd, Jingjiang LiGong Precision Casting Co., Ltd with total covering over 60,000 square meters.SDG has set up advanced production line of silica-rubber melting technology which is leading in the field with fine smelters ranging from 250g to 3000g...