A filter element for fluids, in particular for hydraulic fluid, has a foldable filter casing (10) with at least one filter layer (18, 20, 22, 24) extending between two end caps (26, 32). To vary in regions the thickness of the filter casing (10), the height (h.sub.1) of each filter fold (12, 44) increases from one end cap (26) to the other end cap (32). Alternatively, with the filter fold height (h.sub.1) being maintained, the outer diameter (40) of the filter casing (10) varies in the direction of one of the end caps (26, 32).

Disclosed is an air conversion and condensation electro-magnetization system which comprises a water production and treatment system, a power source and a control system, wherein the water production and treatment system comprises an air purification and condensation water-production system, a primary filter and storage system, and a water quality optimization system, the output end of the air purification and condensation water-production system is connected with the input end of the primary filter and storage system, and the output end of the primary filter and storage system is connected with the input end of the water quality optimization system. The air conversion and condensation electro-magnetization system can be used for producing high-quality drinking water meeting the drinking standard at reasonable costs in places where energy and electricity are available, and overcome the drinking water difficulty for remote arid areas lacking water sources.

A filter assembly for authenticating a filter cartridge includes a filter housing and an optical scanner mounted to the filter housing. A controller uses the optical scanner to take one or more digital images of the filter cartridge and obtain digital coded data identifying the filter cartridge. Specifically, the controller locates a functional locator on the filter cartridge, determines a location of an identifying region on the filter cartridge, reads the digital coded data by interrogating the identifying region with the optical scanner, and determines that the filter cartridge is authentic based at least in part on the digital coded data.

A filter assembly for authenticating a filter cartridge includes a filter housing and an optical scanner mounted to the filter housing. A controller uses the optical scanner to take one or more digital images of the filter cartridge and obtain digital coded data identifying the filter cartridge. Specifically, the controller locates a functional locator on the filter cartridge, determines a location of an identifying region on the filter cartridge, reads the digital coded data by interrogating the identifying region with the optical scanner, and determines that the filter cartridge is authentic based at least in part on the digital coded data.

A system and method for removing a coating from an excavated pipe section includes impacting liquid jects against the coating and collecting a mixture of the liquid and debris of the removed coating. The mixture is subjected to active separation and passive separation to capture the debris, wherein the debris can be appropriately disposed.

A system and method for removing a coating from an excavated pipe section includes impacting liquid jects against the coating and collecting a mixture of the liquid and debris of the removed coating. The mixture is subjected to active separation and passive separation to capture the debris, wherein the debris can be appropriately disposed.

An oil conditioner is provided for removing impurities from oil, such as water, fuel and glycol, to increase engine life and efficiency. An evaporator assembly includes an upper plate, a lower plate, with a heater unit sandwiched between the two. To increase the efficiency of the evaporator assembly, materials are selected so that the upper plate thermal conductivity property is greater than the lower plate thermal conductivity property; and, optionally, the lower plate includes a reflective surface to direct thermal radiation toward the upper plate. This unique design enables oil conditioning with reduced power consumption and improved heating compared to existing technology.

A membrane contactor includes: a cap has an internally beveled surface and a cap port; a cup body has an externally beveled surface in sealing engagement with the internally beveled surface, a side port on a side of the cup body and an end port located on an end of the cup body; and a membrane cartridge is located within the cup body, is sealed to an open end of the cup body, and is in sealed fluid communication with the end port. A method of making a membrane contactor includes the steps of: sealingly mating a perforated center of a membrane contactor with the end port of a cup body; sealingly joining an end of the membrane cartridge adjacent an open end of the cup body; and sealingly joining a beveled surface of the cap to a beveled external surface of the cup body.

A filter frame, a filter cartridge, and an assembling method of the filter cartridge are provided. The method has the following steps. A filter core and a filter frame are prepared. The filter frame has a glue-cutting segment. Glue is coated around an outer wall of the filter core, and then the filter frame, which is mounted around the filter core, is pushed toward the glue to make the glue-cutting segment press the glue until the glue is cut into two parts. The inner glue part disposed between the filter core and the filter frame seals the filter cartridge. The outer glue part is disposed on an outer side of the filter frame, and is superfluous and removed. The glue-coating is combined with the mounting of the filter frame, thereby saving time and effort.

A filter assembly includes a canister housing closable by a lid and containing a removable and replaceable filter element cartridge. The lid is part of the filter element cartridge and a single unitary component therewith, such that removal of the filter element cartridge also removes the lid, and replacement of the filter element cartridge also replaces the lid.