Consider recessed-impeller pumps

摘要

Perhaps you have encountered pumping duties handling free-flowing slurries, sludge and fibrous materials. If used in these services, a standard centrifugal pump may clog, become vapor-bound or wear excessively. For the applications mentioned here, pumps with fully recessed impellers (Fig. 1) should be given serious consideration. Recessed "gentle pumping action" impellers incorporate the vortex principle illustrated in Fig. 1 wherein only an estimated 15% of the total fluid throughput makes contact with the fully recessed impeller. These pumps are typically available in flow capacities approaching 100 1/sec (1,580 gpm) and heads ranging to 130 m (430 fit).