Zero leakage canned motor pumps

Bhola, M. J.
June 2005
Chemical Business;Jun2005, Vol. 19 Issue 6, p39
Trade Publication
Centrifugal pumps are the most widely used pumps in the chemical process industry. With strict government environmental regulations, the pump manufacturer of today has to address critical issues of pollution. industrial safety, process management and cost control. Product leakage around the equipment is no longer tolerated. The pumps are to run efficiently and economically and are to be teak free as welt. Pumping problems are most often related to seal problems. There has been considerable improvement in the sealing mechanisms of shafts. Sealing of critical fluids call for double mechanical seats which require a contained barrier fluid seal flush system with an inert liquid. Even this does not completely eliminate leakages, which increase the normal wear and tear. It is in this context that the industry turns to non seal canned motor pumps, since mechanical seals are proving both expensive and inadequate to meet the expectations. Recent years have seen more and more units opting for sealless canned motor pumps whose manufacurers are improving their performances with superior materials of construction and safety features.


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