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+49 (0)3644 5058-0

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Recertification according to Council Regulation (EC) No 834/2007 (BIO certificate)

Establishment of further storage facility (540 m²)

Implementation of an operating data logging and measurement data acquisition

Certification of an energy efficiency system

Restructuring the hall exterior and roof of the warehouse

Online launch of our new company website after extensive redesign

Renewal of the fire alarm system

Implementation of a new ERP system

Successful Bio Certification

Conversion of the plant control system


Cryogenic Milling with the Pin Mill GSM 250


The Pin Mill GSM 250 is a cryogenic grinding system of the highest quality. The milling plant is made of stainless steel. This also applies to the other system periphery such as the cooling screw conveyor, the filter, etc.

Features of the pulverizing mill

  • Small particle sizes of up to 20 µm (microns) achievable
  • Grinding of hygroscopic materials by means of gas loop operation with inert gas (nitrogen)
  • Cryogenic grinding: By using liquid nitrogen viscoelastic materials can be grinded
  • The plant is suitable for smooth fine grinding of critical substances which tend to adhere to surfaces or caking/ adhesion
  • Various Mill Pins can be used depending on the requirement

By reducing the loss of essential oils with cryogenic grinding an improvement of the flavour can be achieved, in comparison to milling at normal temperature.

  • Pin Mill for cryogenic milling
  • Pin Mill for cryogenic milling
  • Pin Mill for cryogenic milling
  • Pin Mill for cryogenic milling
  • Pin Mill for cryogenic milling
  • Pin Mill for cryogenic milling
  • Pin Mill for cryogenic milling
  • Pin Mill for cryogenic milling
  • Pin Mill for cryogenic milling
  • Pin Mill for cryogenic milling

Principle of operation

The crushing principle of the Pin Mill is impact crushing, whereby two opposed pin discs rotate at a high peripheral speed. In this case the material impacts on the pins with high speed and is thereby broken into smaller particles. Beyond this, the air turbulence within the pins causes a collision of the particles.
The plant can be run as cryogenic grinding operation or as gas loop operation.

Cryogenic grinding operation:
Liquid nitrogen is injected into the cooling screw conveyor, i.e. the substance is transported by the liquid nitrogen, which cools down the material to its product-specific processing temperature.

Gas loop operation:
Here, the cooling screw conveyor is not supplied with liquid nitrogen, but overlaid with nitrogen gas.

Application areas for Cold Grinding

The following product groups can be milled on our Pin Mill for cryogenic grinding:

  • Spices and vegetables, dried

  • Food additives

  • Minerals

  • Plastic powder for the manufacture of food package

  • Viscoplastic products that require embrittling with liquid nitrogen, e.g. plastics and elastomers

  • Hygroscopic materials

Request additional information... Contact us...

Am tiefen Graben 6, DE-99510 Apolda
Phone: +49 (0)3644 5058-0
Fax:     +49 (0)3644 5058-99