The spelling “agite” without the accent does look like a typo. An “agitated filter is a closed vessel designed to separate solid and liquid by filtration under pressure or vacuum. The closed operation ensures odorless, contamination free and nonpolluting working conditions maintaining product purity and hygiene. The advanced technology of agitation and hydraulics used in the equipment makes it versatile and user friendly” (http://www.millenniumequipments.com/anfd.html). Since agitated filters are closed or self-contained systems, “clos” would appear to be pleonastic here. Hence, I would suggest “agitated filter” as a translation. Agitated Nutsche filters are used in the pharmaceutical industry. Check out “agitated Nutsche filter” on Wikipedia.