Viscosity refers to the ability of fluid to flow impedance , which is defined as : liquid velocity 1cm / s flow , the size of the shear stress required for each 1cm2 plane , called the dynamic viscosity in units of Pa  s .

    Viscosity is a property of the fluid. Fluid flow in the pipeline , there laminar , transitional , turbulent three states also exist in the mixing equipment flow state three , one of the main parameters of the decision is that the viscosity of the fluid state .

    During the stirring , the viscosity is generally considered less than 5Pa  s for low viscosity fluids , for example : water, castor oil, syrup, jam, honey, oil , heavy oil, low viscosity emulsion ; 5-50Pa  s is the viscosity of the fluid example: ink, toothpaste, etc. ; 50-500Pa  s for high viscosity fluids , such as chewing gum , plastisol , solid fuels ; greater than 500Pa  s special high viscosity fluid such as : rubber mixture , the plastic melt , the organic silicon.

    For low viscosity media with a high speed stirrer, a small diameter can be driven by the fluid around the loop , and to the distance. The high viscosity of the fluid medium is not the case , to be used directly to drive the agitator .

    Suitable for low viscosity and medium viscosity fluids with a paddle wheel , open turbine , propeller , long thin blade propeller , disc turbine , Buruma gold type , frame paddle after clover curved , MIG type and so on. Apply to blood and blood special fluid impeller ribbon impeller , screw, anchor type, frame type , propeller and so on. Some fluid viscosity changes with the reaction , you need to be able to fit a wide viscosity field with impeller , such as the Pan- can type impeller.