Various systems and methods are provided for a lubricant filter. In one example, a method for a lubricant filter comprises indicating a condition of the filter based on a difference between a measured pressure differential and an expected pressure differential during select conditions in which all lubricant pumped by a pump upstream of the filter flows into the filter.

A fuel pressure regulator and fuel filter assembly includes: a housing, having a connecting end having a fuel channel; a filter element, located in an accommodating cavity of the housing; a cover plate, located at a second end of the housing; a rear cover, having one end being an opening end and another end being a spring seat, and a sidewall, the opening end being connected to the housing; a spring, a first end thereof being pressed against the spring seat; a seal arranged in the rear cover, a second end of the spring being pressed against the seal; and a fixing ring that fixes the rear cover to the connecting end of the housing, the fixing ring being welded by laser to the connecting end. When fuel pressure is no greater than a spring preload, the seal closes the fuel channel.

A device for cooling and filtering hydraulic fluid comprises a first chamber that includes a fluid inlet connection, a filter cartridge, a bypass manifold, and an inlet to a cooler; and, a second chamber that includes an outlet from the cooler and a fluid outlet connection. The cooler interconnects the first and second chambers through the inlet of the first chamber and the outlet of the second chamber. The bypass manifold is configured to return fluid entering the fluid inlet connection to the fluid outlet connection when a first pressure differential at the bypass manifold is above a first value, and to pass the fluid onto the filter cartridge when the first pressure differential at the bypass manifold is at or below the first value.

A filter device includes a device housing (2) removably accommodating a filter element (26) with an element material (28) extending between two end members (32, 34). One end member (34) has a wall member (46) of a polygonal shape inserted into an accommodating space (66) of an accommodating member (36) attached to the device housing (2). The accommodating member (36) also has a polygon-shaped wall member (68). The wall members are disposed adjacent and facing each other in an accommodating state. The accommodating space (66) is delimited outwards by its wall member (68) with a polygonal shape. A further wall member (70) with a circular shape delimits the accommodating space (66) to the inside and passes through a circular transfer space (76) in the adjacently disposed end member (34).

Modular pure water systems are provided that have a tank and a cover assembly, wherein the tank and cover assembly are configured to removably receive therebetween one or more expansion tubes in a fluid tight manner to allow for selective volume expansion of the pure water system. Also provided are purification media bags for pure water systems that have a shape, construction, and/or material that mitigates the flow of water between the outer wall of the bag and an inner wall of the pure water systems.

A filter-included energy-saving large-capacity direct-acting precision pressure regulation valve includes a main body that is formed of a pressure regulation seat, a pressure regulation filter valve, and a protective cap arranged in sequence from top to bottom. The pressure regulation filter valve includes a main channel through which a primary side pressure and a secondary side pressure may flow. The main channel includes a primary valve port and a secondary valve port arranged therein for controlling and regulating the secondary side pressure and flow in a stage-wise manner. A flowrate straight rod assembly includes a straight rod fit to a pressure plunger ring. A straight rod spherical seat and a straight rod holder are coupled to an upper section of the straight rod and a secondary valve port spring supports a lower section of the straight rod. The pressure plunger ring is supported on a primary valve port the spring.

When a lid covers an opening portion formed at an upper end of a filter case with a bottomed substantially cylindrical shape inside which a filter element is disposed, the internal space between the lid and the filter case is formed. A bypass flow path connecting the internal space and outside space is formed in the lid, and a relief valve disposed moveably between a position closing the bypass flow path and a position opening the bypass flow path includes an air bleeder formed from a porous material.

A device and system for purifying a fluid is provided. The system includes a tank having an interior space and a media container disposed within the interior space. A valve is provided that cooperates with an element within the interior, the valve being movable between an open and a closed position. The valve being biased to the open position when the element is not positioned within the interior space, wherein the interior space is fluidly coupled to the atmosphere in the open position. The valve further being configured to move to a closed position when the element is positioned within the interior space.

A filter element includes a first end cap, a second end cap, and a ring of filter media disposed between the first end cap and the second end cap. The ring of filter media circumscribes a central cavity. The filter element also includes an air-bleed conduit axially extending through the central cavity. The air-bleed conduit includes a first portion integrally formed with the first end cap and a second portion integrally formed with the second end cap. The second portion is configured to fluidly connect to the first portion.

A device and system for purifying a fluid is provided. The system includes a tank having an interior space and a media container disposed within the interior space. A valve is provided that cooperates with an element within the interior, the valve being movable between an open and a closed position. The valve being biased to the open position when the element is not positioned within the interior space, wherein the interior space is fluidly coupled to the atmosphere in the open position. The valve further being configured to move to a closed position when the element is positioned within the interior space.