Magnetic Drive Pumps
Product Overview

Magnetic drive centrifugal pump operation is similar to a standard centrifugal pump except the motor shaft seal is eliminated. Instead, magnetic drive pumps are designed to isolate the wet end of the hydraulic circuit from the motor by driving an impeller and magnet assembly with a radial or axial drive magnet assembly attached to the motor shaft. Motor torque is transmitted by the drive magnet through a plastic housing that separates the driven impeller magnet from the fluid being pumped. Leaks caused by shaft seal failure are eliminated. The end result is a more efficient seal-less centrifugal pump that will not leak and is capable of achieving up to 50 thousand hours of continuous duty operation.

The impeller shaft and bearing system features an excellent combination of inert materials of construction to handle the most aggressive of chemicals and cooling passages designed to use the pumped liquid as a lubricating coolant. GRI uses ceramic shafts with either Teflon® or ceramic thrust bearings as standard materials for each magnetic drive pump line. These robust features add tremendously to the chemical compatibility and overall life of the pump to make it virtually maintenance free.

Impellers and pump bodies are designed to produce efficient flow and head characteristics required in today's applications. The hydraulic designs, coupled with motors specifically designed for the pump end, means less power consumption for the work performed.

Typical OEM applications include film processors, Laser and x-ray cooling systems, medical, scientific, laboratory and silver recovery equipment. Magnetic drive centrifugal pumps must be used where flooded suction conditions exist.

Pump Specifications:
Flow Rates - Range to 35 gpm (132 lpm)
Max. Discharge Head - Range to 53 feet (16 m)
Max. Fluid Temperature - Up to 250 F (121 C)
Motors - All motors, except the 15651 series and 18650 series motors which use sleeve bearings, have sealed electric motor grade ball bearings, are thermally protected, class B insulated, and continuous duty rated. Most pumps available with AC or DC motors.

Materials in Contact with Solution: See individual pump series.

Selection Procedure: Determine the flow and discharge head requirements for your system. The performance curves on this page provide the flow rates for each magnetic drive pump series. The performance curve characteristics of a pump model may not meet the exact requirements of your application. It may be necessary to throttle the discharge of a pump with more flow or head capacity to fine tune the performance.

For proper selection of the wetted materials of construction (pump body, impeller, adapter disc, O-ring, impeller bearing) refer to the Chemical Resistance Charts.