Nowadays, the application of plate heat exchangers is more and more extensive, but it is not without limitation. For example, when the temperature exceeds 200°C, the rubber sealing gasket cannot be used. The plate and shell heat exchanger has high safety performance under special working conditions such as high temperature, high pressure and high corrosion, while retaining the plate heat exchange efficiency.

What these two heat exchanger types have in common is that they do not use rubber gaskets. The former material is made of copper brazing or nickel brazing, and the latter material is to weld round plates together. But in any case, these devices have their own characteristics and have a wide range of uses in any field. Working in a high temperature environment, such as steam, heat transfer oil, hydraulic oil or other media, etc., once working in this environment, the rubber cannot be used and is easily deformed, thus losing its sealing performance, and the gain is not worth the loss. The plate and shell heat exchanger is very suitable for special working conditions such as high temperature, high pressure and high corrosion.

Plate and shell heat exchangers have their special advantages in high temperature, high pressure and high corrosion environments. Welding is the key technology of plate and shell heat exchangers, and mastering a stable welding process is the key. It involves durability and heat exchange. If this process is not well mastered, leakage occurs during use, which will cause the entire production workshop or heating system to stagnate. The quality of welding must be clarified before use or selection. In 2016, Qingdao RPT organized a team of specialists to research and develop. For the first time in China, it realized the fully automatic and stable welding of plate and shell heat exchangers, and the laser welding of semi-welded and double-walled plate heat exchangers. Technology monopoly. Through different customers, different working conditions, and extensive practical application testing, the quality has completely reached the level of international leading brands, and very good social and market benefits have been achieved.