bio-m® BSA & TSA Sealed Agitators
bio-m® BSA & TSA Sealed Agitators
bio-m® BSA & TSA Sealed Agitators
The Classic Standard – Perfected
While magnetic technology represents the future of sterile mixing, specific process requirements or legacy specifications often demand the robustness of a mechanically sealed system. The bio-m® BSA (Bottom Mounted) and TSA (Top Mounted) series represent Liquitec’s engineering refinement of this classic technology.
Designed for the pharmaceutical, biotech, and food industries, these agitators utilize high-precision mechanical seals and hollow-shaft drive technology to ensure smooth operation and sterility. Whether for cell culture fermentation or complex chemical applications, the BSA and TSA lines offer a reliable, validatable solution when a physical shaft entry is required.
We have optimized the "traditional" agitator to meet "modern" Swiss quality standards: ensuring dead-leg-free vessel connections and maximum serviceability.
Advantages
Both BSA and TSA models are designed with dead-leg-free insertion flanges to ensure complete drainability and cleanability (CIP/SIP).
The bottom-mounted BSA features an optional lowering device, allowing maintenance personnel to replace the mechanical seal without removing the heavy drive unit—a significant reduction in downtime and labor costs.
The use of hollow-shaft gear motors with integrated bearings ensures a low-profile design and smooth, quiet running of the agitator shaft.
The top-mounted TSA can be configured with standard DIN 28141 flanges, making it an ideal "drop-in" high-quality replacement for existing competitor units on legacy vessels.
Full material traceability (1.4435/AISI 316L) and FDA/USP Class VI compliance for all elastomers.
Options
Mounting Positions
- BSA: Bottom-mounted for bioreactors and easy access
- TSA: Top-mounted for standard process vessels.
Shaft Diameters
Standardized options ranging from 25 mm to 100 mm depending on the model.
Mechanical Seals
Single or double mechanical seals, cooled or uncooled, adapted to specific process media.
Drive Units
Stainless steel motors, ATEX (explosion-proof) versions, or standard IEC motors with painting according to customer specs.
Surface Finish
Standard electropolished Ra < 0.8 µm or 0.6 µm; high-end finishes (Ra < 0.4 µm) available upon request.
Impellers
Compatible with the full bio-m® impeller range (Rushton, Propeller, Segment, etc.).