Due to the high tip speed of the dispersion blade, dispersion blades are subject to wear. Depending on formulations this wear can be severe. DisperseTech offers several wear treatments.
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JACKETED TANKS AND THERMAL SHOCK
Rapid changes in temperature of the heat transfer media can thermally shock the equipment. Typically, thermal shock is defined as changing the cooling or heating media at the jacket inlet more than 25 F per minute.
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Dispersion Rules of Thumb
The "Rules of Thumb" present a very good starting point, for specifying disperser.
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Disperser Blade Mounting
To transfer torque from the shaft to the blade, manufacturers use a number of configurations. The two most common are bore and keyway and bore and pinholes.
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Properties of Common Solvents
Density, boiling point, evaporation rate, and flash point of common solvents
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Disperser Horsepower Formula
Of all the "Rules of Thumb" the issues resulting from this pose the most severe issues. While not difficult to calculate, Blade Horsepower does not correlate well to a simple Volume to power relation. Most disperser manufacturers rely on a modification of the agitator horsepower relationship.
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Tip Speed Definition and Formula
Blade Speed (tip speed), measures how far a point on the outer most edge of the disperser blade travels in a given amount of time
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Fineness of Grind
The grind gauge is an instrument that indicates the fineness of grind or the presence of coarse particles and agglomeration in a dispersion. It is commonly used to determine how finely ground the particles of pigment are dispersed in a sample of paint.