(under the class definition) Apparatus in which at least a portion of the fluent material is circulated in a closed circuit from and back to the separator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
167+, for a closed circulating system in a structural installation.
189, for separatory apparatus including means to circulate filter particles between plural chambers.
621+, 712+, 765, and 805, for separating processes including recirculation.
779, for processes with residual returned to prefilt. SEE OR SEARCH CLASS
137, Fluid Handling,
268, for infiltration means ancillary to a fluid handling system, and subclass 563 for a closed circulating system of general utility.
204, Chemistry: Electrical and Wave Energy,
238, for an electrolytic cell which includes a filter and recirculating means.
