Effertz Tore

The large optical and infra-red telescopes of the European Southern Observatory (ESO) look deep into outer space from the Paranal Mountain in Chile. In order to protect the sensitive high-tech equipment from the harsh mountain environment, Effertz Tore GmbH from Mönchengladbach developed and produced special dust-proof clean room doors. The doors have been opening and closing for 15 years already without any difficulties.