Magnetic couplings transmit torque through a sealed containment shell, enabling a hermetically sealed drive without a dynamic shaft seal. This helps eliminate leakage points and improves safety when handling hazardous, corrosive or valuable fluids.
TRCI supports selection and specification of magnetic coupling solutions for pumps and rotating equipment, helping you match torque, speed, materials and containment design to your process conditions and reliability targets.
A magnetic coupling uses an inner and outer magnet assembly separated by a containment shell. The drive motor turns the outer magnets, which transmit torque through the shell to the inner magnets connected to the pump or mixer shaft—without a direct mechanical connection through the housing.
Because torque is transmitted through the containment shell, the process fluid stays fully enclosed. Selection depends on required torque, speed, temperature, viscosity, the medium’s chemical properties, and the design limits of the coupling and containment shell.
The containment shell is a critical element that separates the magnets and keeps the process sealed. Material choice depends on corrosion resistance, pressure requirements and temperature. Selection also considers eddy current losses and heat generation (design-dependent).
Correct sizing provides torque margin to avoid decoupling during transients such as start-up, viscosity changes or process upsets. Selection balances torque capacity, efficiency and thermal limits.
Magnetic couplings can generate heat due to losses in the containment shell and fluid drag. Proper design and system conditions help manage temperature to protect magnets and maintain reliability (application-dependent).
Many systems require safeguards to avoid dry running, as the pumped liquid often supports cooling and lubrication of internal components. Monitoring and interlocks can help protect equipment in abnormal conditions.
Magnetic couplings are often selected where leak-free containment is critical, or where the process fluid is hazardous, aggressive, odorous or environmentally sensitive.
Share the details below and we’ll recommend the best-fit coupling concept and materials for your duty cycle:
They eliminate dynamic shaft seal leakage points by using a sealed containment shell. Overall leak-free performance also depends on the complete equipment design and installation.
If torque demand exceeds capacity, the coupling can decouple (slip). Correct sizing provides margin for start-up and process changes.
They can generate heat due to losses and fluid drag. Design and operating conditions must manage temperature to protect magnets and maintain reliability.
It depends on the pump design and internal clearances. Share your fluid and solids data and we’ll advise on suitability and safeguards.
Fluid properties, duty cycle, operating temperature/pressure, speed, materials and containment targets, plus installation constraints.
Tell us your fluid, temperature/pressure, viscosity range, duty cycle and motor speed. If you’re replacing a sealed pump or solving leakage issues, include current equipment details. We’ll propose the best-fit magnetic coupling concept and practical next steps.