March 2001

Rotating Equipment

Magnetic-drive pumps: technology and new applications

Developments in bearings, containment shells, magnets and cooling techniques improve reliability

Fig. 1. Three types of chemical pumps standardized to ISO 2858 Sealless pumps are increasingly being used to pump environmentally critical substances. Behind this trend lie the drastic stiffening of environmental legislation and increased environmental awareness of customers in industry. Sealless pumps include canned motor and magnetic-drive pumps. The latter are employed in almost all areas of chemical

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