1924:
Foundation of Diessel.
1945:
Destruction of the building during the war and immediate reconstruction of the new factory premises.
1955:
Fritz Diessel retires from the management. His son Lothar Diessel is the successor.
1958:
Development of the DIESSEL milk collecting truck.
1963:
Diessel's first participation in the Dairy Engineering Exhibition in London. Orders are placed for 50 yoghurt systems with a planetary paddle mixer which was especially developed for that system.
1969:
Relocation of the factory premises to Hildesheim-Bavenstedt.
1971:
Walter Diessel retires. His son Dipl.Kfm. Victor Diessel is the successor.
1974:
Celebration of Diessel’s 50th firm’s anniversary.
1983:
Start of activities in the biotech industry by cooperation with the GBF (company for biotechnical research).
1988:
Lothar Diessel sells its business shares completely to Victor Diessel and retires from the business.
1997:
Dipl. Kfm. Börge Diessel, son of Victor Diessel, represents the fourth generation joining the company.
1999:
Celebration of Diessel’s 75th firm’s anniversary.
2003:
Branches organization
- Pharma + Biotech Systems
- Food + Berverage Systems
2004:
Takeover of Diessel activities by the GEA group. Registration as GEA Diessel GmbH.