Abstract: Fluid treatment elements and methods for treating fluids may be used to treat fluids, including gases, liquids, or mixtures of gases, and/or solids, in a crossflow mode of operation. For example, some fluid treatment elements and methods may be used to remove one or more substances from the fluid and may then function as concentrators or filters or separators. Other fluid treatment elements or methods may be used to transfer substances between two fluid streams and may then function as mass transfer devices.

Abstract: A filter assembly may include a valve which includes a valve member. The valve member moves between a first position and a second position and the valve is opened and closed.

Abstract: A filter assembly may include a valve which includes a valve member and a sleeve. The valve member moves between a first position and a second position in response to rotation of the sleeve.

Abstract: A filter assembly comprises a filter (10) defining path for fluid passing to or from the filter (10). An adaptor (11) is connected to the filter (10) and provides a continuation of the path. The adaptor (11) is for mounting the filter (10) on a mounting plate (12) and carries one or more sealing rings (30, 37) that are engageable with the mounting plate (12). The adaptor (11) is made from a plastics material and one surface of the adaptor (11) is reinforced by contact with an annular reinforcing member (31) which may be of metal, particularly steel. This allows the flow path provided by the adaptor (11) to be maximized.

Abstract: A filter assembly comprises a plastics housing and a filter element held in the housing. The housing can be sterilized by subjecting the interior of the housing to steam under pressure while the exterior of the housing is at atmospheric pressure. The filter element comprises a water wettable filter medium. The ends of the filter medium are embedded in first and second plastics end caps. The first and second end caps form respective water-wettable joints with the filter medium and the characteristics of the filter medium are not materially changed.