replaceable gaskets, which separate the revolving stator from the drive shaft. Dual cones with connecting enclosure designs are usually able to pump out any residual material as long as that material has not dried. In that case, cleaning may actually be more dif-ficult than cleaning of other rotor/stator mixers since there is no way to open the head. Soaking the mixing head in hot soapy water while running is the best method of clean-ing here. The relative simplicity of rotating rotor/stator mixers provides several attractive points. If their capabilities can be shown through testing in the laboratory and pilot plant to meet the requirements of the process, they have their place in making dispersed products.

doi:10.1201/9781420000955-45

Chapter

replaceable gaskets, which separate the revolving stator from the drive shaft. Dual cones with connecting enclosure designs are usually able to pump out any residual material as long as that material has not dried. In that case, cleaning may actually be more dif-ficult than cleaning of other rotor/stator mixers since there is no way to open the head. Soaking the mixing head in hot soapy water while running is the best method of clean-ing here. The relative simplicity of rotating rotor/stator mixers provides several attractive points. If their capabilities can be shown through testing in the laboratory and pilot plant to meet the requirements of the process, they have their place in making dispersed products.

Chapter

replaceable gaskets, which separate the revolving stator from the drive shaft. Dual cones with connecting enclosure designs are usually able to pump out any residual material as long as that material has not dried. In that case, cleaning may actually be more dif-ficult than cleaning of other rotor/stator mixers since there is no way to open the head. Soaking the mixing head in hot soapy water while running is the best method of clean-ing here. The relative simplicity of rotating rotor/stator mixers provides several attractive points. If their capabilities can be shown through testing in the laboratory and pilot plant to meet the requirements of the process, they have their place in making dispersed products.

ABSTRACT

Axial-flow impellers are capable of producing four times the flow for a given horsepower as Rushton-type turbines. Hence, they are almost exclusively used in processes dominated by flow [7]. On the other hand, axial-flow impellers are not known for exerting high amounts of shear. Although the maximum shear rates are similar for axial-and radial-flow mixers (since this is determined by diameter and rotation speed), radial-flow impellers produce more turbulence and shear on their own than axial-flow impellers. This is why the original inventors of what is often called the Eppenbach mixer designed the rotor/stator mixing head in such a way that the amount of shear along with the maximum shear rate would be increased in order to make the machine capable of producing emulsions and suspensions.