1930Foundation of the company by Friedrich Uhde. Fabrication of high-pressure valves for ammonia synthesis in the workshop of a mine near Dortmund 1933Foundation of Hagen factory. Patenting of the Uhde-Bredtschneider vess......1930Foundation of the company by Friedrich Uhde. Fabrication of high-pressure valves for ammonia synthesis in the workshop of a mine near Dortmund 1933Foundation of Hagen factory. Patenting of the Uhde-Bredtschneider vessel closure 1950Development of glandless stirrer drives 1955Construction of the first tubular reactors for the fabrication of polyethylene at 1600 bar first and at 3200 bar later on 1956Fabrication of valves for the urea process 1960Introduction of autofrettage at pressures up to 16 000 bar in order to extend the service life of high-pressure components 1978Development of jet-cutting systems for cutting at 3500 bar first 1980Construction of turnkey plants for the extraction of substances from natural feedstock by means of supercritical gases at pressures up to 1000 bar 1986Participation in the Ariane space programme by means of cryogenic high-pressure valves for hydrogen and oxygen 1991Development of the clamp closure for quick opening of high-pressure vessels 1994Construction of the first unit for the pasteurisation of foodstuffs at pressures up to 10 000 bar 1995Development of a non-polluting high-pressure plant for effluent-free dyeing of textiles 2001First applications of high-pressure technology in the 300 mm wafer technology under cleanroom conditions 2002Construction and commissioning of a cGMP pharmaceutical plant under high-pressure conditions 2003First industrial-scale jet-cutting unit in the world at 6000 bar operating pressure 2005Construction of the biggest LDPE unit in the world: 400 000 tons/year at 3500 bar