Features: 1. In terms of structure: This series of heat exchangers are mainly divided into two types: vertical and horizontal. This series of heat exchangers currently provide up to four shells and four tube structures. Through strict process guarantees, the possibility of short-circuiting water in the shells is eliminated, the problem of easy short-circuiting in multiple shells for many years is solved, and the heat transfer is improved. Efficiency, reducing the possibility of a series system consisting of multiple water-water heat exchangers absorbing (releasing) heat to the outside world, reducing pipeline connections, and making on-site construction more convenient. 2. Safety performance manufacturing: This series of heat exchangers have been systematically optimized in terms of structural strength and heat transfer in strict accordance with national standards, so that the product can ensure safety and performance, and at the same time eliminate material waste as much as possible, and respond to the national call for energy conservation and emission reduction. Computer-aided design and the accumulation of refrigeration experience in refrigeration pressure vessels for half a century, through advanced processing and welding equipment, the product manufacturing can basically fully meet the design concept. The outstanding advantage of this series of products is the use of advanced internal baffles (such as spiral baffles and baffle rods, etc.), which can increase the heat transfer coefficient by about 30% compared with the arcuate baffles under the same pressure loss. The disadvantage is that the use of The new form of baffles complicates processing and costs more. Operating conditions: This series of products are widely used in various water quality, the temperature range of the inlet and outlet water on both sides is 0-100℃, and the pressure is 1.0Mpa. Application: This series of heat exchangers has been widely used in various industries of national economic operation, such as sewage treatment, waste heat recovery and other fields.