High temperature resistant chemical pump temperature changes require cooling

High temperature resistant chemical pump temperature changes require cooling

　　The cooling of the pump is very important. A good cooling method can prolong the service life of high temperature chemical pumps. What are the cooling requirements of the temperature change of the high temperature chemical pump? Before understanding the cooling method of chemical pumps, we must first know a concept. The "high temperature" in high temperature chemical pumps is actually distinguished by grade. It is not called a high temperature chemical pump when we imagine it reaches 100 degrees. Generally distinguished by the following three levels:

High temperature chemical pump

　　 1. For the medium whose temperature is lower than 120℃, usually no special cooling system is set up, and its own medium is mostly used for lubrication and cooling. Like the old HG, SWH pump, PHG canned chemical pump (the protection level of the canned motor should be H when it exceeds 90℃); while the CZ ordinary and old IH chemical pumps can reach the upper limit of 140℃ due to the suspension structure- 160℃; The highest operating temperature of IHF fluorine-lined pumps can reach 200℃; only CQB ordinary magnetic pumps use temperature not exceeding 100℃. It is worth mentioning that for the medium that is easy to crystallize or contains particles, it should be equipped with a sealing surface flushing pipeline (the interface is reserved in the design.

2. For the medium above 120°C and within 300°C, a cooling cavity should generally be provided on the pump cover, and the sealed chamber should also be connected with coolant (double-end mechanical seal is required). When the coolant is not allowed to penetrate into the medium , It should be connected after cooling its own medium (can be realized by simple heat exchanger). At present, the company has CZ type chemical process pump, GRG high temperature pipeline pump and LQRY hot water circulation pump (under development) for selection. In addition, CQB-G high temperature magnetic pump can be used for high temperature media within 280℃

3. For the high temperature medium above 300℃, not only the pump head part needs to be cooled, but also the suspension bearing room should be equipped with a cooling system. The pump structure is generally a center bearing open type, and the mechanical seal is preferably metal bellows, but the price High (the price is more than 10 times that of ordinary mechanic