High-temperature pumps are manufactured at WITTE PUMPS & TECHNOLOGY GmbH from a wide variety of material combinations. Ceramic materials are mainly used. For example, bearings and gears can be made of SiC or zirconium oxide. Housings can also be made of ceramic materials. Here, however, it is not possible to fall back on the classic design because, for example, threaded holes would not have the strength as would be the case in steel housings.