Probst & Class: 90 Years of mechanical engineering for the processing and manufacturing industry

The PUC colloid mill has made Probst & Class world-famous. We now produce a number of other machines that are used in a variety of key industries.

Probst & Class GmbH & Co. KG, owned by the Falk family, was established in 1926 by Hermann Probst and Ewald Class. The abbreviation “PUC” which is well known throughout the world, is derived from the names of the company’s founders. The first PUC colloid mill patented by Probst & Class was introduced in 1933.

We develop and produce rotor/stator systems for the wet micro-comminution, homogenizing, dispersing and de-aeration of flowable and pumpable products. We also supply vacuum de-aeration units and complete lubricant processing units.

Our modular system design gives us high flexibility. We can adapt to your special requirements quickly and competitively.

Company history at a glance

1926 Company foundation
1933 First patent registration
1955 First exhibition appearance at the Achema (world-wide leading trade show for process technology)
1956 Market introduction of our perforated disc mill
1967 Patent granted for the de-aeration of highly viscous liquids
1972 Market entry into Japan
1976 Patent granted for a colloid mill with conic rotor
1983 Patent grant and market introduction for our Multistage mixer Type A
1991 Establishment of a test lab
1995 Market introduction of the inboard colloid mill
2001 Entry of the follow-up generation of management
2002 Market entry of Multistage mixer Type B
2006 Our production becomes semi-automated
2006 Extension of our patent for de-aeration with a simplified construction
2017 PUC becomes exclusive distributor for Mountech products in Europe
2019 Transfer of the executive management
2020 Executive management goes back to owner family

Easy and Fast Cocoa Beans Grinding with a PUC Colloid Mill K120 - Video