1.For the temperature below 120 degrees Celsius, usually do not set up a special cooling system, more use of their own media to lubricate and cool. Like DFL (W) H chemical pump, DFL (W) PH chemical shielding pump (more than 90 DEG C when the protection level of the shielding motor should be used in class H); and general DFCZ and IH chemical pump as a result of the suspension structure can make the temperature reaches 140 DEG ~160 DEG C; IHF fluorine pump maximum temperature up to 200 c; only the CQB ordinary magnetic pump using temperature not exceeding 100 DEG C. It is worth mentioning that the media is easy to crystallize or contain particles should be equipped with a sealing surface flushing pipeline (design are left with an interface).
2.For less than 120 DEG, 300 DEG C medium, generally on the pump cover shall be provided with a cooling chamber, a sealed chamber should be connected to the cooling liquid (to be equipped with double mechanical seal), when not allowed cooling liquid medium, the medium itself should be taken after cooling (access can be realized by a simple heat exchanger). At present, the company has DFCZ type chemical process pump, GRG high temperature pipeline pump and HPK hot water circulation pump (being developed) can be used, in addition to CQB-G high temperature type magnetic pump can be used for high temperature medium within 280 degrees celsius.
3.For medium high temperature above 300 DEG C, not only part of the pump head need cooling, suspension bearing room should also be equipped with cooling system, pump center supporting structure is generally the best form of mechanical seal using metal bellows type, but the high price (the price is 10 times more than the ordinary mechanical seal). At present, the company only DFAY centrifugal pump temperature can reach 420.
