A filtration unit contains a plurality of filter housings, each filter housing having a cylindrical shell with a lower port, an upper port, and a filter element. The lower and upper ports direct fluid through the filter housing in a first direction during a filtering cycle and direct fluid through the filter housing in a second direction during a backwashing cycle. The unit also includes a diverter and a servomechanism that rotates the diverter to selectively connect the filter housing to a drain port for the backwashing cycle.

The filtering apparatus includes: a casing having an inlet for a fluid from the outside and an outlet for the fluid having filtered therein; filter elements having opposite-end openings, provided in the casing, and each filtering the fluid by allowing the fluid to flow therethrough in inside-to-outside directions; backwashing pipes sequentially connected to the opposite-end openings at different timings between the opposite-end openings of each filter element so as to backwash the filter element by allowing the fluid to flow therethrough in outside-in directions; removers each axially moved in the corresponding filter element by the filtration or backwashing flow, while sliding in contact with the inner periphery of the filter element so as to remove trapped objects; and a backwashing fluid drain pipe coupled to the discharge side of the backwashing pipes and allowing the trapped objects removed by each remover to be discharged to the outside.

The self-cleaning filtering device for filtering a mixture of liquid sulfur and bentonite includes a filter cartridge, a tank having an upper section and a lower section separated by the filter cartridge, a heating jacket surrounding the tank, an inlet above the filter cartridge, and an outlet from the lower section. There is an outlet of oversized particles, a steam inlet to the heating jacket, an outlet of condensate, a cover, a bracket on which the filter cartridge is arranged, and a pressure assembly on the filter cartridge having a pressure member and a pressure spring. The pressure member has pressure points on the rim of a pressure ring which are adjacent to the rim of the filter cartridge. The system and method prepares a mixture of liquid sulfur with bentonite for granulation.

An adapter for a pool cleaning system is provided. The adapter includes a base member having a top and a bottom surface. The adapter also includes six upper ports coupled to the top surface of the base member, each upper port including an upper aperture extending through the upper port and through the base member. The adapter further includes five lower ports coupled to the bottom surface of the base member, each lower port including a lower aperture extending through the lower port and through the base member. In some embodiments, four of lower ports are in fluid communication four of the upper ports and one of the lower ports is in fluid communication with two of the upper ports.

A filter apparatus is disclosed herein that includes a filter, such as a cartridge, positioned within a housing. The housing includes a lower-section housing and a cover assembly removably attached to the lower-section housing. The filter apparatus has multiple ports and valves, such as a valve associated with the cover assembly, so as to allow a user to easily switch between various operations on a pool filter, such as between a backwash mode and a filtration mode. The filter apparatus also employs a cage positioned around the cartridge, thereby between the housing and the filter. The cage provides additional support to the cartridge so as to reduce wear and tear of the cartridge. The cover is rotatable about the lower-section housing so as to allow a user to position ports on the cover in any direction.

Disclosed is a filtering system used in any pool filtrations, filtration of taps or building entrance hot and cold use water, filtration of city water before osmosis filtering devices, filtration of heating and cooling mechanical plant systems, and filtration of cooling water in hydro-electric power plants. The system provides for forming a vortex inside a filter by directing and increasing speed of filtered liquid and thus providing decreasing pressure on the filter surface and collection of filtered particulates in a particulate accumulation chamber. The system also provides for automatic cleaning of the filter by reverse flushing, without the need for dismantling, by differential pressure sensors based on rate of contamination.

According to one embodiment, a separation apparatus includes a filter configured to separate a white blood cell from blood sent from a blood container, and a first flow channel through which the blood container and the filter are in communication with each other. The separation apparatus introduces, through the first flow channel, the blood into the filter from below and in an anti-gravity direction.

There is disclosed a fluid filter device. The fluid filter device comprises: a primary filter section having a first porous section; and a secondary filter section having second porous section; wherein: (i) the primary filter section and the secondary filter section are in fluid communication with one another, and (ii) the first porous section has a greater porosity than the second porous section. There is also disclosed a fluid isolation device for isolation an exterior fluid from a surface of an enclosure containing interior fluid. The device comprises a sleeve element movable between: (i) a retracted portion in which exterior fluid contacts the surface of the enclosure, and (ii) an extended position in which exterior fluid is isolated from contacting the surface of the enclosure. A distal portion of the sleeve element is configured to actuate a backwash element configured to backwash the interior fluid from the enclosure when the sleeve element is in the extended position.

This invention relates to at least one filter system with inner flow or outer flow, at least one shaft, at least one back wash outlet and at least one back wash valve, at least one volume separator rotating disk containing at least one back wash hole located between the insert and back wash outlet, at least one filter cleaning mechanism enabling the cleaning of the dirt particles generated on the filter insert without opening the filter cover, containing at least two flow cross-section reducing plates, realizing the speedy passage of the liquid in the insert through the gap between the flow cross section reducing plates and the surface of the insert, forming a pressure drop in that area during the speedy passage and as well as a process of cleaning on the surface of the insert with the passage of the liquid from outside the insert to inside.

A filtration system is disclosed, which comprises a filtration-element within a filtration chamber, and a valving device located exteriorly to the filtration chamber, for reversing the direction of fluid-flow through the filtration-element for backwashing. The valving device thus functions as a common valve for handling both filtration and backwash. The common valve is based on a linearly-movable plug located inside a valve housing which is communicable with the filtration chamber, with a source of fluid to be filtered, and with evacuation port for backwash fluid, through three respective openings in the valve housing, and is characterized by an uninterrupted bend-free flow-channel extending at least from exteriorly to an inlet opening of the valve housing, to the body of the filtration-element whenever the common valve is in a filtration mode of operation.