Floor-Standing Preparative Ultracentrifuge

What is the Floor-Standing Preparative Ultracentrifuge?

A floor-standing preparative ultracentrifuge reaches 70,000 to 100,000 rpm and 500,000 to 800,000 x g with a vacuum chamber and refrigeration. It is the standard instrument for virus purification, lipoprotein separation, exosome isolation and large-scale density-gradient work in research and biopharma laboratories.

Overview

The floor-standing preparative ultracentrifuge is the principal workhorse for laboratories that need true ultracentrifugation capacity. It houses an induction drive, a diffusion or turbomolecular pumping system and a refrigeration unit within an armored chamber. Maximum speed is 70,000 to 100,000 rpm depending on the rotor, with maximum RCF of 500,000 to 800,000 x g for small fixed-angle and vertical rotors. Swing-bucket rotors typically hold 6 x 38 mL or 6 x 13 mL tubes at 30,000 to 40,000 rpm. The control panel offers programmable run profiles, including slow acceleration and deceleration for gradients, zonal and continuous-flow operation, and rotor life tracking. Vacuum is reached in 2 to 4 minutes, and temperature is controlled from 0 to 40 C with accuracy of plus or minus 1 C. Units weigh 250 to 450 kg.

How does it work?

An ultracentrifuge drives a titanium or carbon fiber rotor through a high-frequency induction or brushless motor, typically with a magnetically suspended or oil-lubricated flexible shaft. The chamber is evacuated below 0.1 Pa (1 micron Hg) by a rotary vane and diffusion or turbomolecular pump, eliminating air friction that would otherwise overheat the rotor. Refrigeration controls rotor temperature via infrared sensing, usually between 0 and 40 C. Particles sediment according to Stokes' law, with sedimentation coefficients measured in Svedberg units, in preparative runs, or are separated by buoyant density in cesium chloride, sucrose or iodixanol gradients in isopycnic runs. Rotors are identified automatically, and the control system tracks run hours and cycles to derate them. A heavy armor ring contains rotor fragments in the event of failure.

What are the key features?

• Maximum speed of 70,000 to 100,000 rpm with 500,000 to 800,000 x g
• Fixed-angle, swing-bucket, vertical and zonal rotors available for each task
• Vacuum reached within 2 to 4 minutes using rotary vane and diffusion pump
• Programmable run profiles including slow accelerate and coast-to-stop for gradients
• Automatic rotor identification with cycle tracking and overspeed protection

What are the technical specifications?

A typical floor-standing preparative ultracentrifuge configuration offers maximum speed of 70,000–100,000 rpm, maximum RCF of 500,000–800,000 x g, temperature range of 0 to 40 °C, temperature accuracy of ±1 °C, chamber vacuum of ≤ 0.1 Pa and time to vacuum of 2–4 min. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Floor-Standing Preparative Ultracentrifuge is used in virus and viral vector purification, lipoprotein and plasma fractionation, exosome isolation and subcellular organelle separation. Across the wider Ultracentrifuges class, laboratories also deploy it for virus and viral vector purification, exosome and extracellular vesicle isolation and lipoprotein fractionation.

Which standards and certifications apply?

Relevant standards and methods include IEC 61010-1, IEC 61010-2-020, IEC 61326-1, ISO 9001, EN 12469 and GB 4793.1. Certification candidates for this model are CE, ISO 9001 manufacturing and IEC 61010-2-020 compliance; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Floor-standing units weigh 200 to 450 kg and often require a dedicated 220 V or 380 V circuit and a level, vibration-free floor. Rotor management is critical: log every run, derate titanium and aluminum rotors per the maker's schedule, and retire rotors at the stated lifetime. Use only tubes and adapters certified for the rotor, and fill them as specified. Vacuum pumps need periodic oil changes, and seals require inspection. Clean rotors with neutral detergent and never use chloride or strong alkali on aluminum. Annual preventive maintenance should include speed, temperature and vacuum checks. Install and operate in line with IEC 61010-2-020 and local pressure-vessel and biosafety rules.

How do I select the right Floor-Standing Preparative Ultracentrifuge?

Select the floor-standing model for multi-user facilities, high throughput or work demanding 500,000 x g or more and large swing-bucket capacity. It requires more space and power than benchtop siblings. In the RFQ, specify maximum RCF, rotor list, tube formats, temperature range, pump type, floor loading and supply voltage.

How does it compare with other Ultracentrifuges variants?

Specify the maximum RCF needed: 100,000 to 150,000 x g suits most gradient and pelleting work, while ribosomes, small viruses and proteins need 300,000 to 600,000 x g or analytical capability. Choose rotor geometry to match the task, with swing-bucket rotors for gradients, fixed-angle rotors for pelleting, vertical or near-vertical rotors for fast gradients and zonal or continuous-flow rotors for large volumes. Consider tube materials and sealing, because ultracentrifuge tubes require heat-sealed or cap-assembled closures. Evaluate run documentation, rotor life tracking, temperature range, vacuum time, noise, and installation needs including weight, power and cooling water. For multi-user facilities, autoclavable rotors and biosafety containment options matter.