Described are assemblies of porous polymeric filter membranes that include two polymeric filter membranes in series, i.e., as part of a membrane assembly; filter components and filter products that include the two polymeric filter membrane layers; methods of assembling the polymeric filter membranes, filter components, and filter products; and methods of using the polymeric filter membranes to remove particles from a liquid such as a semiconductor processing liquid fluid.

A filter medium, filtration device, and methods for the same are described. The filter medium may include a base impregnated with a cured epoxy resin. The cured epoxy resin may be the reaction product of, or formed by, the reaction of an epoxy resin and a curing agent. The epoxy resin may include a diglycidyl ether. The diglycidyl ether may be the reaction product of or formed by the reaction of a diol and an epihalohydrin. The epihalohydrin may be derived from one or more renewable sources. The method may include impregnating a base filter medium with an impregnation composition including one or more of an epoxy resin, a curing agent, a solvent, or a combination thereof. The method may also include reacting the epoxy resin with the curing agent to form a cured epoxy resin.

Filter media may be bonded to a filter housing during filtration processes. However, bonding between the filter media and filter housing sufficient to prevent delamination during filtration processes may be challenging as some filter media may be challenging to adhere sufficiently well to the filter housing. Furthermore, for use in consumer water applications, it may be desirable for filter media may undergo sterilization processes (e.g., using an autoclave) that expose the filter media to relatively high temperatures and pressures, which may decrease the adhesion strength between the filter media and the filter housing. Accordingly, there is a need for strategies for bonding filter media to filter housings that do not compromise the performance of the filter media and/or that can undergo sterilization processes without unacceptably compromising the structural integrity of the bond between the filter media and the filter housing.

A modular connector for filtration devices is provided, where each modular connector includes a T-junction, sterile connectors, and a valve. The modular connector may be attached to ports of a filtration device and are configured to be coupled to other identical modular connectors of other filtration devices to facilitate the assembly of a modular manifold assembly that is more compact and has a smaller footprint than convention manifold assemblies. The valves of the modular connectors may be utilized, once the filtration devices are coupled to one another via the modular connectors, to direct a flow path in parallel through the filtration devices or in series through the filtration devices. The modular connectors may further facilitate the connection of any number of filtration devices to create a modular manifold assembly.

A fuel filter assembly includes a filter housing that forms a cavity, and a center stack. The center stack is positioned within the cavity and includes an axial aperture in the top portion, the axial aperture having a circumferential surface, and a fuel filter. The fuel filter includes a filter center support. The fuel filter also includes a sword positioned along a surface of the filter center support, an end cap, a filter element attached to an undersurface of the end cap, a water separator at a filter base of the fuel filter, and a pin attached to the water separator. When the fuel filter is positioned within the filter housing, the sword engages with a slot of a center stack of the fuel filter housing and the pin aligns with a channel of the housing.

A channel-separating structure comprises a top cap portion, comprising a cooperating tube, and a channel-separating portion. The cooperating tube comprises a connecting section. The channel-separating portion comprises a central tube, multiple ribs and a connecting seat. The central tube is mounted through the cooperating tube and comprises a central channel. A peripheral channel is located between the central tube and the cooperating tube. The ribs are mounted around the central tube. The connecting seat abuts and connects the connecting section. A method for manufacturing a channel-separating structure comprises: providing a top cap and a channel-separating element, inserting the channel-separating element into the top cap, and welding to connect the top cap and the channel-separating element to manufacture the channel-separating structure, thereby cutting costs. The channel-separating structure is assembled to a filter core. The central channel and the peripheral channel provide different filtration routes according to the filter core.