Magnetic Coupled Pumps
Magnetic coupled pumps transmit torque contactlessly from the motor to the impeller via a magnetic coupling. This eliminates the shaft passage and the dynamic seal - the pump is hermetically sealed and leak-free. VENTAIX supplies the MKPG series in PP, PVDF or stainless steel for flow rates from 1 to 140 m³/h and heads up to 48 m.
Innovative Technology for Demanding Industrial Applications
Magnetic coupled pumps, also known as magnetically coupled or sealless pumps, are used in numerous industrial applications – from the chemical industry and hydrogen production through to wastewater treatment. Our magnetic coupled pumps handle flow rates between 1 m³/h and 140 m³/h and achieve heads of up to 48 m.
Operating Principle and Design
Unlike conventional centrifugal pumps, in which the impeller is connected directly to the drive shaft, magnetically coupled pumps are driven by a magnetic coupling. The magnet connected to the pump impeller and encapsulated by the containment shell is set in rotation by the magnet mounted on the motor shaft. This design hermetically isolates the impeller and eliminates the need for dynamic seals between pump and motor.
Materials and Construction
Our magnetic coupled pumps are manufactured from PP (polypropylene) and PVDF (polyvinylidene fluoride) as well as from stainless steel. The choice of material depends largely on the medium being pumped and the process conditions of the respective application.
Magnetic coupled pumps in plastic:
No wetted metal parts, made from PP and PVDF. PP offers high chemical resistance to many acids, alkalis and aqueous solutions. PVDF provides particularly high resistance to acids and a wide range of other chemicals and can be used at temperatures up to 90 °C.
Magnetic coupled pumps in stainless steel:
Particularly suitable for applications with high system pressures and high media temperatures. They are resistant to a wide range of alkalis, some acids and aqueous solutions and are frequently used for demineralised water and solvents. Suitable for use up to 10 bar system pressure and 160 °C media temperature.
Fields of Application
- Chemical industry: handling of acids, alkalis and corrosive media
- Electroplating: handling of volatile and aggressive liquids
- Water treatment: dosing of additives and chemicals
- Wastewater treatment: safe handling of both clean and contaminated liquids
- Pharmaceutical industry: sterile processes and cleanroom applications
- Semiconductor industry: ultrapure handling of electrolytes
- Food and beverage industry: hygienic handling of sensitive products
- Hydrogen production: transport of ultrapure water
- Absolutely tight: hermetic sealing eliminates any risk of leakage
- Low maintenance: no dynamic seals, no wear on the shaft
- High safety: ideal for hazardous and toxic media
- Chemically resistant: designed for aggressive and corrosive media
- Versatile: universally applicable in almost all industrial sectors
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Frequently Asked Questions about Magnetic Coupled Pumps
What is a magnetic coupled pump?
A magnetic coupled pump transmits torque contactlessly from the motor to the impeller via a magnetic coupling. This eliminates the shaft passage and the dynamic seal – the pump is hermetically sealed and leak-free, making it particularly suitable for hazardous or toxic media.
Can magnetic coupled pumps run dry?
No. Standard magnetic coupled pumps must be filled before start-up, as the plain bearings are lubricated by the pumped medium. Dry-run resistant special designs are available on request.
Which material should I choose for my magnetic coupled pump?
PP is suitable for many acids, alkalis and aqueous solutions up to approx. 90 °C, PVDF covers an even wider range of chemicals. Stainless steel is used for high system pressures, temperatures up to 160 °C or for solvents. Any questions about chemical resistance? Give us a call.
Are the magnetic coupled pumps ATEX certified?
Selected MKPG models are ATEX certified for potentially explosive atmospheres in zones 1 and 2 in accordance with EU Directive 94/9/EC.