How it Works
Benefits of choosing a ROSS High Speed Disperser
What does a ROSS High Speed Disperser do?
The cost-effective saw-tooth disperser is a standard workhorse in the production of chemicals, polymers, composites, inks, paints, adhesives, food products and a variety of other applications. Its major purpose is to incorporate powders into liquid and break down particle agglomerates to generate a fine stable dispersion.
How does a ROSS High Speed Disperser work?
The open disc blade of the high speed disperser, which travels at roughly 5,000 feet per minute, is designed to induce vigorous turbulent flow within a low viscosity batch. It creates a vortex into which dry ingredients can be poured for fast wetting. The blade speed may be changed as the batch thickens or increases in volume to maintain the vortex and rate of material turnover. To avoid "stratification" or possible layering inside the batch, most models allow the disperser to be raised and lowered during mixing.
Features at a Glance
Why Choose a ROSS High Speed Disperser
Design - ROSS High Speed Dispersers are truly a heavy-duty design. They are equipped with inverter-duty TEFC or explosion proof motors up to 500HP, heavy duty V-belt drives and bearings, an air/oil hydraulic lift, high-quality laser cut blades and stainless steel wetted parts. These machines are built to last.
Scalability – ROSS High Speed Dispersers are available from bench top laboratory models to very large production models capable of dispersing several thousand gallons at a time.
Flexibility - The design of the ROSS High Shear Disperser allows for containers of various sizes (diameter and height), as well as their placement on or off center. The shaft is used as a baffle in off-center mixing. This reduces or collapses the vortex which minimizes air entrapment in the batch. Tank mounted designs, telescoping covers, matching vacuum rate vessels and covers, swivel lift and other customizations are available.
Safety - Safety limit switches prevent operation of mixer while in the raised position or without a mix vessel in place. (UL/CE/CSA-rated) For mixers installed in hazardous locations explosion proof limit switches are supplied.
ROSS High Speed Dispersers are available in a variety of models and configurations, including both laboratory and production models. For a detailed feature list and dimensions, please refer to the specification documents below.
Video in Action
Consider high-speed sub-surface solids injection for demanding and high-volume dissolution requirements.
The saw-tooth disperser and rotor/stator mixer are two of the most widely used high speed mixers yet many are unaware of the differences in their utility and operating capacities. Knowing the unique attributes of these devices is important in mixer selection and process optimization.
This bulletin describes a technique for obtaining better quality pre-mixes and reducing milling time in the production of ultrafine dispersions.
Pigment dispersions are typically prepared in a two-step process: (1) powder wet-out in a batching tank and (2) one or more passes through a mill to achieve the desired fineness of grind. The costly and time-consuming milling step is often a production bottleneck which in the past has forced manufacturers to add more milling equipment to handle multiple passes or simply keep up with volume demands. Today, companies are looking at better ways to prepare the pre-mix and disperse agglomerates as close as possible to the desired specifications to reduce the number of mill passes, allow the use of smaller grinding media, or even eliminate milling altogether.