Renfert Twister Evolution – Programmable Vacuum Mixer

The Twister Evolution uses multi-step programming to control every phase of the cycle: pre-vacuum to remove initial air, pre-mixing to wet powders evenly, main mixing with high torque for fast homogenization, reverse rotation to break stubborn agglomerates, and post-vacuum to extract remaining micro-bubbles.
By matching vacuum level, speed and timing to each material’s rheology, you stabilize viscosity and density from batch to batch.
This leads to cleaner surfaces, more compact models, fewer voids and reduced finishing corrections, especially on high-detail work where porosity can compromise accuracy.

Use higher vacuum (close to 100%) for dense plasters and investment materials when your priority is mechanical strength and minimal porosity.
For alginates and certain duplication materials that can foam or be sensitive to strong suction, reduce vacuum (typically 70–85%) to preserve texture while still limiting trapped air.
Pair this with a progressive vacuum ramp and moderate speed at the start of the cycle, then increase once the mix becomes uniform.
The best approach is to validate and save one profile per material so technicians can reproduce results quickly with minimal variability.

Yes. The high-torque motor maintains stable rotation under load, helping to keep consistency even when mixing heavier materials.
The 16 l/min diaphragm pump delivers reliable vacuum performance (around ~890 mbar), supporting repeatable bubble reduction across consecutive cycles.
The keypad interface simplifies daily use, while stored programs reduce operator dependency, which is essential during intensive production runs.
With a 500 cc bowl, adjustable vacuum and a 100–450 rpm speed range, it covers common lab applications from model plasters to investments and duplication workflows.

Keep the unit clean after each session and prevent powder build-up around seals and interfaces.
Regularly inspect the bowl, lid and gaskets: a small leak is often the first cause of reduced vacuum stability or longer cycles.
Monitor vacuum performance; if it drops unexpectedly, check seal integrity and contact surfaces before assuming a pump issue.
Ensure proper ventilation and always use the correct voltage range (110/240 V). If you change materials or brands, revisit saved profiles, as powder granulometry and additives can affect behavior.
Use the provided guides for routine checks and repairs to maintain consistent production quality.