Provided is a filter module for a gravity-type water purifier. The filter module for a gravity-type water purifier according to an exemplary embodiment of the present invention includes: a plurality of filter members which are plate shaped, and which are fixed to each other via one or more fastening bars while arranged spaced apart from each other in parallel having gaps therebetween; and a common water collecting member coupled to the respective water collecting holes formed in the filter members, and in which filtered water produced from the filter members is collected.

A water filtration system utilizes a housing configured to utilize various types of filter media and having a press-sealed closing system. The closing system includes a head portion defining a head opening, a lock member, and a lid member. The lock member releasably engages the head portion such that an abutment section of the lock member projects into the head opening. The lid member is received by the head portion to cover the head opening, and has an outward-facing press section configured to abut an inward facing portion of the abutment section of the lock member when the lid member is covering the head opening. Pressure generated within the housing during water filtration presses the lid member in an outward direction and causes the lid member press section to press against the abutment section of the lock member to substantially prevent disengagement of the lock member from the head portion.

A module having polymeric gas-separation membranes is capable of operation in extreme temperature environments. In one embodiment, the module includes polymeric fiber membranes, a tubesheet for holding the membranes, and a sleeve encasing the membranes, all of which are made of materials having coefficients of thermal expansion which differ from each other by not more than about 10%. In another embodiment, the membranes, the tubesheet, and the sleeve are all made of materials having a glass transition temperature greater than a highest anticipated temperature of operation of the module. In another embodiment, the module includes a head, and a clamshell having multiple protrusions which engage corresponding grooves in the head and in at least two grooves formed in the tubesheet.

A device which includes a pulse dampener and a degasser or de-bubbler. The device includes a fluid flow path and a fluid chamber located within the device. In addition, the device includes a pulse dampening membrane for dampening pulses in the fluid as it flows through the device. The device also includes a degassing membrane for degassing the fluid as it flows through the device, and/or a de-bubbling membrane for removing gas bubbles from the fluid as it flows through the device. The degassing or de-bubbling membrane can be separate and distinct from the dampening membrane. The de-bubbling membrane can be in addition to or in place of the degassing membrane in some embodiments.

A fluid filter and method for filtering fluid feed using the fluid filter is described. The fluid filter comprises an upper disk plate having a first compartment spaced apart and placed parallel to a lower disk plate having a second compartment. The feed fluid enters the first compartment in a first vortex pattern in a first direction at a first temperature, and a permeate fluid enters the second compartment in a second vortex pattern in a second direction opposite the first direction at a second temperature, wherein the second temperature is lower than the first temperature. A hydrophobic, vapor permeable membrane positioned between the upper disk plate and the lower disk plate allows vapor to pass from the first compartment to the second compartment having the permeate fluid, thus filtering the feed fluid.

The present invention provides a reverse osmosis filtration system without pressure tanks consisting of a filter element connecting member and external filter elements and having a raw water inlet, a pure water outlet and a wastewater outlet. In the reverse osmosis filtration system of the present invention, filter elements can be quickly and easily installed for avoiding leakage occurs during the installation or replacement of the filter elements, so that users can conveniently install or replace the filter elements by themselves and purposes of convenient operation and leakage prevention can be achieved. Meanwhile, water storage pressure tanks and pumps are omitted in the reverse osmosis filtration system of the present invention for reducing manufacturing costs and effectively avoiding secondary pollution.

A portable water conditioning system is provided that includes an incoming water inlet; a reverse osmosis stage in fluid communication with the incoming water inlet, the reverse osmosis stage having a permeate outlet and a concentrate outlet; a diversion device having a diversion valve, the diversion valve placing the concentrate outlet in fluid communication with a waste water outlet; a deionizing stage in fluid communication with a pure water outlet; a bypass valve configured to selectively place the permeate outlet in fluid communication with one or more of the waste water outlet, the deionizing stage, and the pure water outlet; and a controller configured to control the diversion device and the bypass valve to provide water at the pure water outlet of a desired condition.

A filtration element including a cylindrical housing enclosing a fluid filtration media extending along an axis (X) between opposing ends with a first and second end cap located at each end, wherein each end cap includes: i) an annular surface co-extensive with the housing, and ii) outer face laying in a plane perpendicular with the axis (X). The outer face of at least one end cap comprises an annular groove. A face seal including a base is located within the annular groove. A flexible lip extends axially from the base and axially beyond the outer face of the end cap and is adapted to engage with an abutting outer face of an end cap of an adjacently positioned filtration element.

A gas exchange system, said system comprising: a plurality of cartridges, each having a casing, said casing having a cartridge inlet adjacent to a first end and a cartridge outlet adjacent to an opposed second end; each casing having a bore in which is placed a gas permeable, liquid impermeable, hollow membrane; each hollow membrane having a membrane inlet arranged to receive a gas from an inlet chamber and a membrane outlet for venting said gas; each cartridge inlet in communication with a concentration zone, and arranged to receive a solvent from said concentration zone, so as to exit said solvent through said cartridge outlet; wherein said bore is arranged to flow said solvent adjacent to said hollow membrane so as to permit the exchange of gas through said gas permeable, liquid impermeable membrane.

A hollow-fiber membrane module according to an embodiment of the present disclosure includes a rectangular tubular outer casing with at least one sidewall being open, the outer casing having a plurality of open ports, and an inner casing configured such that a plurality of hollow-fiber membranes aligned in a longitudinal direction of the outer casing are placeable in the inner casing and configured to be insertable into the one sidewall.