Internal destructive testing has confirmed that the standard bio-m® bearing system withstands dry-running for over 100 minutes before mechanical seizure. While dry operation is outside standard operating procedures, this significant safety buffer protects the asset against accidental startups or drainage errors, ensuring robust performance under real-world conditions.

We design for longevity rather than replacement. Although the Zirconia (ZrO2) and Silicon Carbide (SSiC) bearing surfaces are engineered for long-term wear resistance, the outer bearing assembly remains fully accessible and replaceable on-site. This maintainability ensures the agitator remains a viable, high-performance asset for the lifespan of the vessel.

For critical GMP applications, process validation requires absolute certainty. Our optional Speed Sensor Unit utilizes a Hall effect sensor to detect a trigger magnet located inside the impeller, providing a true confirmation of rotation. This distinguishes the system from standard drive-shaft measurements, ensuring the automation system receives verified feedback from inside the tank.

To eliminate the risk of coating detachment or particulate generation, we utilize solid ceramic bearing materials rather than surface-coated alternatives (such as DLC Diamond-like coatings). A study by the ZHAW - Zurich University of Applied Sciences confirms that our specific Zirconia/SSiC tribology generates no detectable particulates, ensuring the sterile integrity of the product is never compromised by the equipment materials.

A critical design parameter in magnetic mixing is the gap between the drive magnet (can) and the impeller. We prioritize hygienic performance by engineering a widened gap that maximizes fluid flow and CIP efficiency behind the impeller. High-grade magnetic materials are utilized to maintain full torque transmission without compromising this essential cleaning clearance.

To prevent "thermal breathing"—the creation of non-sterile voids during temperature cycling (SIP)—we match the thermal expansion coefficient of our Zirconia female bearings to that of the stainless steel housing. This material compatibility allows for high-precision fits that ensure a almost gapless air pocket, bacteria-tight construction.  

As a manufacturer with full control over our production chain, Liquitec retains the flexibility to adapt standard designs to specific project constraints. We view non-standard requirements—such as specific shaft lengths or flange adaptations—as engineering parameters rather than obstacles. This vertical integration allows us to deliver customized, high-precision solutions with the reliability of a standard product.