Magnetic Coupling

The magnetic coupling is based on a completely different sealing principle. Here the drive for the hydraulic part of the pump takes place through the pairing of permanent magnets whose external unit transmits the torque generated by the motor to an internal unit, which in turn transfers this to the impeller.

The external or atmosphere side magnet system is separated from the internal product side magnetic system by a spacer can made of non-magnetic material. The torque needed to drive the impeller is transmitted exclusively by magnetic forces which act through the spacer can. The pump it is thus hermetically sealed.

The axial and radial mountings for the pump shaft are through hydro-dynamic sleeve bearings made of silicon-free silicon carbide. Bearing lubrication and heat removal normally takes place through the pumped medium, in two separate circuits.

The magnetic drive for vertical pumps is different from the horizontal drive in that the drive is not situated in the fluid area, but only seals the gas phase in the container. Here the pump shaft is mounted in grease lubricated anti-friction bearings. Since non-metallic spacer cans are used exclusively there are no eddy current losses, so heat extraction is not necessary.

 

Magnetic Coupled Pumps:


GVSO – Chemical Centrifugal Pump in Metal

GVSO – Chemical Centrifugal Pump in Metal

Material
Metal
Design
Pumps for applications according to API 610 (ISO 13709
Size
DN 40 - DN 450
Delivery rate
Qmax. = 3.000 m3/h
Delivery head
Hmax. = 200 m
Depth
up to 19 m
Temperature
-40 °C to +600 °C
Nominal pressure
40 bar
RMKN – Magnetic Drive Pump in Metal to DIN EN 22858 (ISO 2858)

RMKN – Magnetic Drive Pump in Metal to DIN EN 22858 (ISO 2858)

Material
Metal
Design
Standardized Chemical Pump (ISO 2858, ISO 15783, ISO 5199)
Size
DN 25 - DN 150
Delivery rate
Qmax. = 400 m3/h
Delivery head
Hmax. = 150 m
Temperature
-40 °C to +250 °C
Nominal pressure
16 bar
FNPM – Magnetic Drive Pump in Plastic

FNPM – Magnetic Drive Pump in Plastic

Material
Plastic-lined
Design
Standardized Chemical Pump (ISO 2858, ISO 15783, ISO 5199)
Size
DN 25 - DN 125
Delivery rate
Qmax. = 350 m3/h
Delivery heat
Hmax. = 100 m
Temperature
-30 °C to +190 °C
Nominal pressure
16 bar