Jiangsu Flying Pump Manufacturing Co., Ltd. has introduced a cantilever centrifugal pump and submerged pump specially designed for conveying molten urea solution, which is widely welcomed by the fertilizer industry. The two pumps for urea melt melt high temperature, strong corrosive, large proportion of the characteristics of the use of smelting and casting special alloy as the basic material, the transmission medium in the -20 ℃ to 180 ℃ temperature range of safe and sound. The most prominent feature of these two pumps is excellent sealing performance, the use of water ring metal seal made of soft materials to overcome the mechanical seal easy to crystallize, easy to burn out and replacement of expensive and other defects.