CTM Magnetically Driven Centrifugal Pump

Magnetically Driven CTM Centrifugal Pumps

How do Tapflo CTM Centrifugal Pumps Work?

CTM Magnetically Driven Centrifugal Pumps

The CTM Centrifugal Pumps are Magnetical Driven End Suction, Close Coupled, Single Stage Centrifugal Pumps feature a Semi-Open or Closed Impeller and are manufactured from either Glass Fibre Reinforced Polypropylene or PVDF to offer high mechanical and corrosion resistance for a plethora of applications at competitive pricing.

Operating Principle of CTM Centrifugal Pumps

CTM operating principle

In order to start the pump, the casing has to be filled with liquid before start-up and have a positive suction head to operate efficiently. The NPSHr (Net Positive Suction Head Required) can be provided during the selection and assessment of the pump for your intended application.

Upon start-up, the liquid enters the pump casing axially onto the eye of the impeller. The rotating impeller generates a centrifugal force accelerating the liquid through the pump casing and into the discharge piping. As the fluid is accelerated by the impeller and thrown towards the discharge outlet a low pressure point is generated at the eye of the impeller effectively drawing fluid from the suction side to the pump and continuing the pumping cycle.

Unlike standard close coupled centrifugal pumps where the impeller is connected to the motor shaft directly, in a CTM Magnetically Driven Centrifugal Pump, the torque from the motor shaft is transmitted to the impeller by means of a magnetic coupling. The drive magnet is fixed on the motor shaft. The magnets installed in the drive magnet and in the impeller/magnet assemblies have different polarities.

When the pump is at rest, the magnets of both parts are aligned. When the motor is started and the drive magnet starts to rotate, the magnets create an attraction and repulsion force thus forcing the impeller to rotate. If the impeller gets blocked or the pumped liquid will be too dense and too much torque will be generated on the motor shaft, the magnet will de-couple and no damaged will be done to the motor. When the pump will come to a stop, the magnets will re-couple. Between both magnet assemblies there is an isolation shell that separates the liquid side from the motor side and from entering the atmosphere.

Typical Applications

The CTM Centrifugal Pumps range is perfectly suited for a wide variety of applications for clean & thin liquids like pure chemicals, acids & alkalis.

Industry Example of application
Chemical stockists  Transfer of various chemicals from storage tanks to smaller containers
Surface treatment  Transfer, filtering and circulation of surface treatment baths
Food and beverage  Pumping of CIP detergent used for cleaning of pipes and other food     process equipment
Water treatment  Dosing of acids and alkalis used as cleaning chemicals in Nano filtration
Chemical manufacture  Pumping of chemicals in industrial detergent equipment
Demineralizing  Demi-water circulation and transfer in many industrial applications
Photo processing  Transfer of photo develop chemicals and inclusion in processing machines
Liquid crystal manufacture  Pumping of concentrated acids and alkalis

Typically, CTM Magnetically Driven Centrifugal pumps are used for tank to tank transfer applications however, they can also be used for pressure boosting, dispensing, loading and offloading, tank cleaning, batching & metering, when used in conjunction with some of our wide range of control accessories.

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