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Leak-free stirring systems for pressure reactors. Also available with ATEX or for inert fluids.

Stirrer drives / magnetic couplings

Reactor Systems

The stirrer shaft sealing is a key component of chemical reactors. It results in leakage-free operation of the rotating stirrer shaft. A stirrer shaft sealing shall be dry–running; avoiding any contamination of the chemistry by a lubricant. The stirrer is an important piece of equipment, it is responsible for mixing and heat transfer, so the dimensions and shapes are crucial.

Magnetic stirrer drives

The use of stirrer drives / magnetic couplings

For pressure reactors, stirrer drives with magnetic couplings are used. Due to their static sealing, they can be operated at full vacuum and very high pressures and high temperatures, for mixing of very high viscosity media.

BÜCHI magnetic couplings (bmd type), equipped with stirrer motor, speed transmission and optional frequency converter to adjust the stirrer speed (ATEX version) form a complete stirrer drive for Laboratory- and larger Pilot Plant reactors.

BÜCHI stirrer drives type cyclone with integrated magnetic coupling and electronic speed controller are used for torques up to 300 Ncm and as non-Ex version for laboratory use.
Metal-free magnetic couplings (bmd 250 I) and stirrer drives (cyclone 250 i ac) feature inert behaviour and full corrosion resistance, as no metal can get in contact with the process media.

Advantages of our magnetic stirrer drives

  • Robust, compact design
  • Absolutely tight
  • Safe
  • No externally moving parts
  • Metal-free executions available
  • Integrated motor and controller
  • EX proof
  • Dry running mechanical sealings

Technical data of our stirrer drives / magnetic couplings

Torque range 50 – 5400 Ncm
Stirrer speed 0 – 3000 rpm
Pressure -1.0 (FV) up to +500 bar / 6000 psi
Temperature -50°C to +500°C
Materials stainless steel, Hastelloy®, tantalum, titanium, ceramic, others
Certification ATEX, material certificates

Suurmond supplies solutions to optimize your process and improve the quality of your end-product. Our specialists will be happy to advise you.

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low - high torque magnetic coupling

Low - high torque magnetic coupling

low - high torque magnetic drives

Low - high torque magnetic drives

Metal-free/ Inert stirrer drives

Metal-free/ Inert stirrer drives

Ex proof stirrer drives

EX-proof stirrer drives