Sanitary Mixers and Dispersion Equipment

May 8, 2010

Holland Applied Technologies provides many different types of mixers for both food and pharmaceutical use.  We

Steridose Magnetic Mixers

have listed some of the more common mixers available on the market.  As always however, if you have a special application where a special type of mixer is needed please contact a Holland representative for more information.

Direct Drive Top Mount Mixers  
Most well known for high speed dispersion and mixing.

  • Can be mounted on the side of a tank using a C-clamp or on top with either flange or sanitary clamp fitting
  • Can be used on both atmospheric and closed pressure vessels
  • Shaft is driven directly by the motor and spins at the same RPM as the motor chosen
  • Typical RPMs – 1750RPM – 3500RPM
  • Available in Electric or Air driven models
  • Most common in smaller tanks of 250 gallons or less

Gear Drive Mixers

  • Most well known for stirring and keeping products in suspension
  • Gears are located between the motor and the shaft causing the shaft to spin slower than a direct drive model.
  • Typical RPMs  20-500RPM
  • Available in Electric or Air driven models
  • Wider impeller than Direct Drive models
  • Require more HP than Direct Drive in most cases

 Magnetically Driven Mixers
Most common in Aseptic applications where the tank is closed to atmosphere

  • Mag Drive mixers have no liquid seal to maintain…the impeller is driven by a magnetic force between impeller on the inside of the tank and drive on the outside
  • Bottom mounted always…..allowing for less head space above the tank
  • Bottom mounted Mag Drive mixers allow for products to be mixed down to a very minimal amount of liquid in the tank.  Top drive mixers cannot always mix down to the very bottom of the tank.
  • Mag Drive mixers are limited in the viscosity of the product being mixed.  Less viscous products are more common

 Shear pump 

  • “Pump” located off the discharge of the tank that shears the product while traveling through
  • Consists of a rotor and stator combination
  • The rotor is turned by the drive and the stator is a stationary “cage that product is passed through
  • Different combinations of rotors and stators produce more or less shear to the product
  • Typical applications include – blending, emulsifying, texturizing, reconstitute, and dispersing

DTL Blender 

  • Blender for dispersing powders into liquid
  • Consists of a powder hopper or powder inlet leading into a liquid blending chamber
  • Continually blends powder into liquid without imparting large amounts of air
  • Powder is sucked through a diffuser tube thus preventing less dust

Colloid Mill 

  • Consists of a conical rotor and stator combination
  • Clearance between rotor and stator can be adjusted during process to achieve desired product conformity
  • Used in emulsifying and texturizing
  • Clearance between rotor/stator can be .001, .010 or .240”