Hermetically Sealed Pump Drive
The magnetic coupling is based on a completely different sealing principle compared to conventional shaft seals. Instead of a direct mechanical connection, torque is transmitted through a pair of permanent magnets.
The external magnetic unit, driven by the motor, transfers the torque to an internal magnetic unit, which then drives the impeller. Both magnetic systems are separated by a non‑magnetic spacer can, which fully isolates the pump interior from the atmosphere.
Hermetically sealed by magnetic force
Torque transmission takes place exclusively through magnetic forces acting across the spacer can. As a result, the pump is hermetically sealed, eliminating any dynamic shaft penetration and preventing leakage to the outside.
This design makes magnetic coupling pumps particularly suitable for applications involving hazardous, toxic, or environmentally critical media.
Bearings and lubrication concept
The pump shaft is supported by axial and radial hydrodynamic sleeve bearings made of silicon‑free silicon carbide. These bearings offer high wear resistance and long service life, even under demanding operating conditions.
Lubrication of the bearings and removal of generated heat are normally achieved by the pumped medium itself, flowing through two separate circulation circuits. This ensures stable operation and effective heat dissipation without additional auxiliary systems.
