ROTOSTAT X AND XP
-High shear rotor / stator type mixers.

Applications:
Viscosity range up to 50,000 mPa×s. Dispersing, dissolving, milling, emulsifying, homogenising.

Shear action
The mixer head consist of an internal rotor surrounded by a freely revolving stator. The stator has three large external paddle blades which restrain its rotation to about one tenth of the rotor speed. At a rotor speed of for inst. 3000 RPM the stator will do about 300 RPM. The rotor draws the mix into the stator where it is subjected to a high shear action prior to being expelled at a high velocity through slots in the stator rim. As the mix passes the slots, it is subjected to intense cutting and disintegrating action for a further reduction of the particle sizes.

Revolutionary revolving stator
When the rotor revolves at high speed inside the surrounding stator, the friction power of the mixture, rotating inside the stator, will attempt to make the stator revolve at the same speed as the rotor. It is, therefore, necessary to introduce a counteracting force that will prevent the stator from revolving with the rotor. With a conventional fixed stator, the counteracting force is exerted by a number of arms or a tube holding the stator in a fixed position. But this means that some of the frictional power is wasted. In the ROTOSTAT the frictional power is transferred out into the slower moving tank flow via the large stator paddle blades, working as a low speed agitator. In other words, the ROTOSTAT utilizes the frictional power to create increased action and less energy is wasted.

This is why ROTOSTAT received the American Chemical Processing Magazine's Vaaler Award. The awarding judges commented on the ROTOSTAT as follows: "The high shear mixer is fast and has low power requirements. The evolutionary design is a combination of mixing and milling achieved through simple but dramatic design changes."

What's in it for you ?
Your ROTOSTAT will be a smaller mixer with a low power consumption - and it will be easier to handle and easier to clean.

Moreover, the improved batch flow eliminates local high temperature in the vicinity of the mixing head and ensures a uniform shearing action throughout the batch.

Characteristics of the ROTOSTAT X and XP:
Flow pattern of type X and XP respectively

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Blue arrows = flow into the mixing head.
Red arrows = expulsion from the mixing head.