Sartorius Bioreactor Disk Impeller 6 Blade 15mm Inner Bore for 10L - 15L Vessel

Sartorius BB-8843940 Rushton Turbine Impeller – 75 mm (15 mm Bore)

The Sartorius BB-88430940 is a specialized 75 mm 6-blade disk impeller engineered for the Biostat® Cplus and other Sterilize-In-Place (SIP) stainless steel fermentation systems. Unlike standard benchtop impellers, this heavy-duty version features a 15 mm inner bore designed to mount onto high-torque pilot-scale stirrer shafts. This impeller is the industry standard for microbial fermentation where high oxygen mass transfer (kLa) and intensive gas dispersion are required. Fabricated from medical-grade AISI 316L stainless steel and finished to exacting pharmaceutical standards, it provides the ruggedness and precision needed for validated pilot-scale bioprocessing.

Technical Performance and Design

• Pilot-Scale Power: Designed specifically for the increased torque requirements of 10 L to 15 L stainless steel vessels, ensuring stable agitation even in high-viscosity microbial broths.

• Superior Gas Breakup: The Rushton-style disk intercepting the gas stream at the sparger creates high shear zones, effectively reducing bubble size and maximizing dissolved oxygen (DO) levels.

• 15 mm Precision Bore: Machined for a zero-tolerance fit on 15 mm diameter shafts, preventing shaft wear and mechanical vibration during high-speed fermentation runs.

• 316L Stainless Steel: Constructed from electropolished, low-carbon stainless steel (Ra < 0.4 µm) to withstand aggressive SIP steam cycles and prevent microbial hiding spots.

Product Specifications

• Catalog Number: BB-8843940

• Impeller Type: 6-Blade Disk (Rushton Turbine)

• Diameter: 75 mm

• Bore Diameter: 15 mm

• System Compatibility: Sartorius Biostat® Cplus (10 L / 15 L), D-DCU Series.

• Material: AISI 316L Stainless Steel

Key Benefits & Applications

• Validated Process Scale-Up: Essential for laboratories moving from benchtop R&D to pilot-scale production, ensuring the mixing profile remains consistent with the larger 30 L and 50 L SIP systems.

• Extreme Durability: The thicker hub and reinforced blade welds are designed for the high-pressure environments of Sterilize-In-Place (SIP) operations.

• Oxygen-Hungry Cultures: The primary tool for E. coli, P. pastoris, and other high-density microbial cultures requiring rapid gas exchange.

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