• The most reliable and cost-effective Digester Mixing System on the market.
• American-made durability.
• Lowest life cycle costs.
• 3m Tm Scotchkote Tm fusion bonded epoxy coated nozzles – 10 year full warranty.
• Guaranteed non-clog Vaughan Chopper Pumps

Conventional, Cost-Effective Sludge Mixing

The Rotamix system incorporates several basic principles of physics and hydraulics, including uniform and vortical fields of flow, induced flow and surface contact. Combined together, this unique mixing system optimizes solids contact due to the homogeneous state.
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Multi-Zone Mixing

The Rotamix multi-zone mixing pattern is a combination of both uniform and vortical fields of flow. In a uniform field of flow, the entire contents rotates as a solid unit with the highest velocity at the outside. In a vortical field of flow, fluid velocities are the greatest at the center, thus creating a vertical-axis vortex. The Rotamix system combines both uniform rotation (ZONE 2), and a vertical-axis vortex (ZONE 1), creating unique multi-rotational zones.

High Velocities

With multi-zone mixing, average velocities are higher and steadier. Solids are also prevented from settling in the center.

Induced Flow

High velocity nozzles also increase the effective mixing volume by inducing entrained fluid, thus significantly increasing the overall mixing effect. High velocity nozzles induce flow over a long distance, thus generating an overall effect over a large volume.

Surface Contact

The Vaughan® Chopper Pump not only eliminates nozzle clogging, but also optimizes surface contact by constantly reducing solids size, thus increasing total surface area.

Nobody else in the market can claim to have the Rotamix Systems Nozzle Assemblies and the Vaughan Chopper Pump.
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The Rotamix System Nozzle Assemblies

The Rotamix system uses fixed nozzle assemblies. Once the nozzle assembly is installed, the nozzles are adjusted to the factory specified angle, and permanently tightened. No additional adjustment is required.

Nozzle assemblies are offered in single and double nozzle (patent pending) configurations, depending on tank diameter and depth. All fittings are ductile cast iron and glass-lined for abrasion resistance, reduced friction, and to eliminate struvite adhesion. The tapered nozzle barrels are 1-inch thick for long-term wear protection. The entire assembly is white metal sandblasted, and then powder coated with 3M TM Scotchkote TM Fusion Bonded Epoxy Coating, a one-part, heat-curable, thermosetting epoxy coating for superior surface protection. Each nozzle assembly includes a 10-year full warranty.

The Vaughan® Chopper Pump

Vaughan’s chopper pump is the heart of the Rotamix system. Since 1960, Vaughan’s proven technology provides long-term low maintenance, and the highest reliability of any chopper pump. Continuously chopped solids not only eliminate nozzle clogging, but enhance sludge quality. Digester efficiency is increased by further reducing solids size and increasing surface contact.