Hangzhou Donghua Power Transmission Imp.& Exp. Co., Ltd is belongs to Hangzhou Donghua Chain Group Co., Ltd which is one of the largest chain manufacturers in China and has five subsidiaries including  Hangzhou Ziqiang Chain Drive Co.,Ltd. Hangzhou Dunpai Chain Co., Ltd. and Hangzhou Donghua Power Transmission IMP.& EXP.Co., Ltd. etc.Hangzhou Donghua Chain Group Co., Ltd. was founded in November 1991.It covers over 300 mu and the building area of more than 85,000 square meters, and has 220 million Yuan's real estate, over 1800 equipment and over 2200 employees.Its annual capacity is more than 20 million meters.In 2004, the total sales income is 500 million RMB Yuan,in which the export sale is 25 million US dollars.Since 1999,it has been in the first position in China’s Chain Industry for its comprehensive strength.In 2000,it was ed as a member of Chain Drive Branch of China General Machine Components Industry Association.
 The company is specialized in producing all kinds of standard chains and special chains, e.g. A or B series chains, automobile chains, stainless steel chains, combine harvester chains, heavy-duty cranked link transmission chains, stereo garage chains and maintenance-free chains etc. In recent years, it invests the capital and depends on the improvement of technology to accelerate the step of new product development and the step of technology reform. It intends to produce high strength and precision chains in order to meet requirements of the domestic and overseas markets.
 The company has made much progress:obtained ISO9002 Certificate of Quality Assurance System in 1996;achieved ISO9001 Certificate of Quality Assurance System in 1999;in 2002, passed the auditing of the revised ISO 9001 Quality Assurance System—ISO 9001:2000.In addition,the company also pays important attention to environmental protection:made a huge investment in establishing a Wastewater Treatment Center to realize the wastewater recovery cycle.In 2002,became one of the first to obtain ISO14000 Certificate of Environmental Management System and gain the qualification of"Green Channe"of Zhejiang Province;performed ISO 9001 Quality Assurance System and ISO14000 Environmental Management System at a time;in 2004,passed the certification of American Petroleum Institute(API).In the implementation of ISO9001 Quality Assurance System,Donghua gradually forms a complete set of normal and scientific quality management system documents,establishes a whole process of quality control system based on prevention,and builds up a continuous improvement and good circulation system to make its product quality into a steady perfection.
 Hangzhou Donghua Power Transmission Imp.&Exp.Co., Ltd is specilized in various gears, such as spur gears, helical gears, bevel gears, internal geas, plastic gears, gear racks and so on.We also can supply gears according to the customers' demands. We pay more attention to the quality of the product.We welcome people  all over the world to cooperate with us.