Mag-Drive
Technology
Magnetic
Drive Concept
The
sealing method is probably the most critical consideration
of any pump selection. The proper sealing method could make
the difference between safe pump operation and a potentially
hazardous situation.
The ISOCHEM line offers the most desirable design from a
sealing standpoint. It employs a gear, centrifugal, or
regenerative
turbine pump magnetically coupled to the prime mover.
Magnetic drive technology provides a safe and reliable pump
for difficult applications.
Magnetic
Coupling
The
encapsulated driven magnet assembly is mounted on the end
of the pump shaft. It is then contained by a closed-end "can"
which seals against the pump housing with a static PTFE o-ring.
A drive-magnet assembly, attached to the electric motor shaft,
rotates around the containment can.
When the drive-magnet assembly rotates, lines of magnetic
force cause the driven-magnet to rotate, which in turn causes
the pump shaft to rotate.
 The
drive-magnet assembly and driven-magnet assembly are actually
made up of smaller rare mineral magnets around the perimeter
of the assembly. They are alternately oriented in a north
pole - south pole configuration. When the coupling is assembled,
the assemblies will naturally rotate so that each small magnet
in the drive-magnet assembly is adjacent to a small magnet
of the opposite pole in the driven-magnet assembly.
The high torque
capability of the rare earth neodymium iron and samarium cobalt
permanent magnets alleviates the possibility of coupling slippage.
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