High Shear Models
High Speed Dispersers:
The Ross High Speed Disperser is built with all of the features and versatility required to produce a wide variety of products. This age old design has been refined and updated for longer life, improved performance and reduced maintenance costs.
Our Standard design includes features such as:
- Explosion proof inverter duty motors
- Heavy duty V-belt drives and bearings
- Stainless steel wetted parts
- Safety switches
- Adjustable mix can lock mechanism
- Air/oil hydraulic lift
High Speed Dispersers are ideal for dispersions that are up to a maximum of approx. 50,000 centipoise. When used in conjunction with Multi-Shaft Mixers, they can be used for products up to several hundred thousand centipoise. Dispersers are available from bench top sizes to very large production sizes capable of dispersing several thousand gallons at a time.
A few rules of thumb to consider when sizing a Single Shaft - High Speed Disperser
Viscosity – make sure the viscosity is such that it can be mixed using a single shaft mixer. The materials are usually within an upper viscosity range of 50,000 centipoise. The materials are ideally thixotropic (shear thinning) and flow well under shearing/mixing conditions
Volume – Determine the volume of product required to meet your production forecasts. Establish the optimum batch size to match your facilities and available personnel.
Vessel design – The optimum vessel design is one that is round with a dished bottom. This design promotes good flow and minimizes the possibility of dead spots where unmixed materials can collect. A flat or sloped bottom is also typical. In general, a vessel that is approximately the same diameter and height is preferred for use with dispersers. Please allow for vortexing of the product by having the sidewalls of the vessel at 30% (freeboard) above the full batch level when the product is at rest. The dispersion blade is normally positioned .5 of the blade diameter off of the vessel bottom. The vessel diameter should be 3x the blade diameter. The full batch level at rest should be 1.5 blade diameters above the blade.
Disperser size and speed – The blade diameter should be roughly 1/3rd the diameter of the vessel. Power consumption will be determined by the diameter of the blade, the density of the formulation, and the speed at which the blade turns. A typical disperser is sized in the range of 10 HP per 100 gallons of product to be mixed. Normal blade is speed is in the 4800 - 5200 fpm (feet per minute) range.