Provided is a water purifier that includes a filtering unit for producing purified water by filtering influent water; a TDS measuring unit for measuring the total dissolved solids (TDS) in the water flowing into the filtering unit; a purified water passage through which the purified water is discharged; a concentrated water passage through which concentrated water, filtered by the filtering unit, is discharged; a concentrated water flow control valve for controlling the flow rate of the concentrated water discharged through the concentrated water passage; and a control unit for adjusting the degree of opening and closing of the concentrated water control valve, on the basis of the TDS and the pressure of the water flowing into the filtering unit.

A round filter element of a filter for a urea-water solution has a filter bellows with a filter medium that continuously extends circumferentially, relative to a filter element axis, around an element interior. An end body is fastened to an end face of the filter bellows and provided with a connecting section for fastening the round filter element to a housing cover of a filter housing of the filter. The end body has a central opening communicating with the element interior. The central opening has a central insertion section for receiving a flexible separation section of a volume compensation device of the filter and has an outer flow-through section enabling flow of the urea-water solution out of the filtration volume or into the filtration volume. The filter has a volume compensation device with a flexible separation section that separates a compensation volume from the filtration volume of the filter.

Disclosed is a filter device having a filter housing (10) that comprises at least two ports (12, 14), such as an inlet for unfiltered matter and an outlet for filtrate, and accommodates a replaceable filter element (16), which is characterized in that by a shut-off device (18) a fluid-conveying connection between the inlet (12) and the outlet (14) that exists in an open position, is blocked in a blocking position, and in that by an actuation device (20) the shut-off device (18) can be brought into these individual positions.

Filter elements and filter systems are provided. The filter element allows for a reversed flow of fluid through the filter element when flowing from a first port to a second port of a filter head of the filter system. The filter element includes a standpipe in a central cavity of a tube of filter media that is fluidly connected with an exterior of the tube of filter media by a radial flow conduit and an axial flow tube.

A filter for filtering contaminants from a fluid. The filter includes a cylinder of pleated filter media, a first end cap coupled to a first end of the filter media and a second end cap coupled to a second end of the filter media. The second end cap including a wall formed to include a central opening. The filter also includes a central core positioned radially inward of filter media and extends from the first end cap to the second end cap. The central core has a cylindrical side wall that is formed to include a plurality of apertures that are adapted to allow for the passage of the fluid. The filter also includes an annular collar that is adapted to be positioned within the central core. The annular collar is adapted to be rotatable with respect to the central core and includes a sidewall formed to include a series of space projections that extend radially inwardly from the sidewall.

A filter assembly comprises a housing, a filter element for filtering a fluid and positionable within the housing, and an expansion membrane assembly. The expansion membrane assembly fluidly separates and is positionable between the housing and the filter element. The membrane assembly extends along an inner surface, a top surface, and an outer surface of the housing.

A leaching tank that can be used in an interstage screening process includes a draft tube with an impeller that extracts slurry or liquid from an interior of a screen basket mounted in the leaching tank. The impeller is driven by a motor, and the speed at which the motor rotates can be selectively varied to vary a flow rate of fluid or slurry being removed from the leaching tank. A position of the input end of the draft tube can be selectively varied within the leaching tank to vary a position within the leaching tank from which fluid or slurry is withdrawn from the leaching tank.

A filter pulsation dampening device has a replaceable filter element including a plurality of baffles disposed next to each other or a flexible valve that is disposed proximate a baffle.

To provide a particle trapping chamber, a particle trapping chip, a particle collecting method, and a particle sorting device, capable of selectively collecting microparticles without directly labeling the microparticles. A particle trapping chamber includes at least a particle trapping unit having a well with a hole, and a particle trapping channel unit used for trapping a particle in the well. The hole causes the well and the particle trapping channel unit to communicate with each other, and at least one of the hole or the particle trapping unit has an inner wall coated with a thermally fusible substance.

A washing machine (900) includes a drum (910) in which washing operations are carried out, a drainage hose (950) fluidically connected to the drum (910) and fluidically connectable to a drainage system and a filter group (1) positioned along the drainage hose (950). The filter group (1) filters synthetic microfibers of micrometric size and is made of a non-woven fabric having synthetic fibers.