DEFON.Founded in 1953, DEFON is a leading heat exchanger manufacturer in China, specializing in the research, development and manufacturing of energy efficient heat exchanger systems. With more than 400 advanced equipments, the company's products cover a full range of heat exchangers such as shell & tube, plate & fin, etc., which can meet the severe working conditions such as high temperature and high pressure, and are widely used in the fields of petrochemical industry, shipbuilding, electric power, etc., and have passed the international certificates such as ASME and PED. As a participant in the development of national standards, DEFOND serves Sinopec, State Grid and other global top 500 enterprises with innovative technology, and continues to promote the technological progress of the industry.