Mixers are units that provide motion in the fluids due to rotary pallets. There is can be provided mixtures with the desired properties in the fluid by changing pallets type, quantity and location in the tank. Pallets are manufactured in propeller type or inclined blade turbine type to provide a vertical flow. In figures showed various pallets types and motions inside the tank created according to pallets location. The following data are needed to solve the problem of mixing:

•    The amount of substance to be mixed
•    The difficulty of mixing
•    The mixing intensity