Hydroextractors are machines which are used in textile processing industry. These are mainly centrifuges. The material wet material is placed in the extractor, which has a wall of perforated metal, generally stainless steel. the internal drum rotates at high speed thus throwing out the water contained in it. The use of hydroextractor significantly reduces the energy required to dry any material.http://www.wordnik.com/words/hydro-extractor
Century Dictionary (2 definitions)
1. A centrifugal machine, specifically one used by dyers, bleachers, and scourers to extract water from textile material. The wet material is placed in a perforated drum or basket and revolved at a speed of from 500 to 1,000 or more revolutions per minute, thus causing the water to be expelled through the perforations by centrifugal force.
2. In tanning, a wringer for removing water from skins.
GNU Webster's 1913 (1 definition)
1. An apparatus for drying anything, as yarn, cloth, sugar, etc., by centrifugal force; a centrifugal.
hydro-extractor [tech.] --- der Dekantierständer
hydro-extractor [tech.] --- der Entwässerungsapparat
hydro-extractor also: hydroextractor [engin.] --- die Wärmepumpe [Maschinenbau]