Magnetic stirrer couplings
Magnetic stirrer drives

S1 and S2 design with standardised ground joint (vacuum-proof, unpressurised)
Magnetic stirrer couplings with NS 29/32 (S1) or NS 45/40 (S2) joint are specially designed for use in flasks and glass reactors with ground joint connections.
F design with flanges DN15 and DN50 (vacuum-proof, pressure-resistant up to 10 bar)
Magnetic stirrer couplings with flanges DN 15 or DN 50 are intended in particular for use on glass reactors, thin film evaporators and extraction columns. This design is not only vacuum-proof but can also be used for applications with overpressure of up to 10 bar.
G design (vacuum-proof, pressure-resistant up to 700 bar)
Threaded magnetic stirrer couplings are the first choice for stirring processes under high to very high pressure. This design can be used for applications up to 200 bar (in the variant made of high-temperature-resistant alloy A-286, 1.4980 even up to 700 bar).
G-V design with M30 thread (vacuum-proof, pressure-resistant up to 200 bar)
The G-V design offers all the technical specifications of the G versions, but is additionally equipped with a side gas flush connection for gas flushing and inertisation.
M design with drive motor (vacuum-proof, pressure-resistant up to 200 bar)
Magnetic stirrer drives offer all the advantages of the G design couplings and are additionally equipped with a three-phase motor. This combination can be used for applications up to 200 bar (in the variant made of high-temperature-resistant alloy A-286, 1.4980 even up to 700 bar).
Volume
Volume up to 50 litres
Custom made
We offer custom designs, tailored
individually to your requirements
ATEX certification on request
On request we can offer our magnetic stirrer couplings and drives explosion-protected




Magnetic stirrer couplings BUK model series S1 and S2

Pressure
Vacuum, pressureless
Types of mixing
Homogenising
Suspending
Dispersing
Gassing
Volume
Up to 10 L
Speed max.
2500 rpm



Magnetic stirrer couplings BUK model series F

Pressure
Vacuum, 10 bar
Types of mixing
Homogenising
Suspending
Dispersing
Gassing
Volume
Up to 10 L
Speed max.
2500 rpm



Magnetic stirrer couplings BUK model series G mit Thread

Pressure
Vacuum, Pressure bis 700 bar
Types of mixing
Homogenising
Suspending
Dispersing
Gassing
Volume
Up to 10 L
Speed max.
2500 rpm



Magnetic stirrer couplings BUK model series G-V mit Thread
Pressure
Vacuum, Pressure bis 200 bar
Types of mixing
Homogenising
Suspending
Dispersing
Gassing
Volume
Up to 10 L
Speed max.
2500 rpm





Magnetic stirrer drive BUK model series M with motor
Pressure
Vacuum, Pressure bis 200 bar
Types of mixing
Homogenising
Suspending
Dispersing
Gassing
Volume
Up to 50 L
Speed max.
1000 rpm







Magnetic stirrer couplings are an ideal solution for stirring tasks under vacuum and high pressure. Stirring shaft rotation is achieved by magnetic coupling without any physical contact, so no moving parts require sealing. Operating pressures up to 700 bar and temperatures up to 550°C are possible.

We supply our magnetic stirrer couplings to users from research, industry, laboratory, colleges, universities, to apparatus engineers and constructors. The choice of various construction materials allows operation under aggressive chemical conditions. Different bearing options extend the field of applications even more.

Rare earth steel magnets are used, coated in the same material as the pressure-exposed section and welded tightly for operation under both low and high pressures.
Magnetic stirrer couplings require very little maintenance and their simple construction facilitates cleaning of the parts which come in contact with the stirred medium. Different bearings and/or construction materials are offered to accommodate almost any application requiring chemical resistance.

Additional connections, e.g. for gas purging or speed monitoring by means of a reed contact can be fitted.