A filter assembly that comprises a housing, an outer filter element, and an inner filter element. The outer filter element is positionable within the housing and comprises an outer filter media. The inner filter element is positionable within the outer filter element and comprises an inner filter media, a media support structure, an inner top endplate, and an inner bottom endplate. The inner top endplate comprising a top rib that extends continuously around a portion of a top surface of the inner top endplate.

In a method for producing a water separator, a support structure surrounding annularly a longitudinal axis and a hydrophobic screen fabric are provided. By ultrasound or by laser radiation, a material of the support structure is plastified in regions that are radially outward at the support structure in relation to the longitudinal axis to generate plastified regions. The hydrophobic screen fabric is arranged at an outer circumferential side at the support structure and the hydrophobic screen fabric is pressed into the plastified regions. A water separator is provided that has a support structure surrounding annularly a longitudinal axis and a hydrophobic screen fabric of a material that is transparent for a laser radiation. The hydrophobic screen fabric is arranged at an outer circumferential side at the support structure and has sections embedded in radially outwardly positioned regions of the support structure.

Disclosed is a fuel pre-filter module for pre-filtering fuel for internal combustion engines, including but not limited to internal combustion engines for light trucks, buses, construction, and agricultural machines. Also disclosed is a filter element for use in the fuel pre-filter module.

Disclosed is a fuel pre-filter module for pre-filtering fuel for internal combustion engines, including but not limited to internal combustion engines for light trucks, buses, construction, and agricultural machines. Also disclosed is a filter element for use in the fuel pre-filter module.

A filter cartridge including a cartridge housing arranged about an axis and including first and second housing end caps and an apertured generally cylindrical housing body joined at opposite ends thereof to the first and second housing end caps, filter material arranged in an accordion-like filter medium disposed within the cartridge housing in a generally cylindrical configuration about a central bore, first and second filter medium end caps attached to opposite ends of the filter medium, a generally cylindrical internal structural member joined to the first filter medium end cap and extending through the central bore and an elongate air venting tube mounted onto the first and second filter medium end caps and extending axially interiorly of the cartridge housing but radially exteriorly of the filter material.

A filtration system comprises a filter head assembly comprising an outlet slot, valve element, and latch element. The valve element is in fluid communication with the outlet slot and includes an open position and a closed position. In the open position fluid flow travels through the outlet slot. In the closed position fluid flow is prevented through the outlet slot. The latch element is configured to lock the valve element in the closed position. The filtration further comprises a filter cartridge structured to engage the filter head assembly. The filter cartridge comprises a first and second filter end. The filter cartridge comprises filter media and a keyed element disposed on the first filter end. The keyed element is structured for engagement of the latch element, wherein the engagement unlocks the valve element causing the valve element to be in the open position.

A filtration system comprises a filter head assembly comprising an outlet slot, valve element, and latch element. The valve element is in fluid communication with the outlet slot and includes an open position and a closed position. In the open position fluid flow travels through the outlet slot. In the closed position fluid flow is prevented through the outlet slot. The latch element is configured to lock the valve element in the closed position. The filtration further comprises a filter cartridge structured to engage the filter head assembly. The filter cartridge comprises a first and second filter end. The filter cartridge comprises filter media and a keyed element disposed on the first filter end. The keyed element is structured for engagement of the latch element, wherein the engagement unlocks the valve element causing the valve element to be in the open position.

A filter module for a filter assembly has a primary filter element and a secondary filter element. A water separation interface is provided for discharging water, which has been separated by the primary filter element from a fluid to be filtered, from the primary filter element. A primary filter interface is provided for discharging fluid, which has been filtered by the primary filter element, from the primary filter element. A secondary filter interface is provided for discharging the fluid, which has been filtered by the secondary filter element, from the secondary filter element. The water separation interface, the primary filter interface, and the secondary filter interface are arranged coaxially to a symmetry axis of the filter module. The water separation interface, the primary filter interface, and the secondary filter interface are each designed for outflow of material flows in axial direction of the symmetry axis.

A method for retrofitting an operating fuel delivery system of a vehicle. The method includes obtaining a vehicle having an operating fuel delivery system, which includes an interconnected fuel tank, a fuel pump and an engine. Obtaining an air separator configured to be attached to the fuel delivery system at a connection point wherein the fuel pump and the engine are in direct fluidic communication and also obtaining attachment means for connecting the air separator to the fuel delivery system by fluidically mounting the air separator at the connection point wherein the fuel pump and the engine are secured in direct fluidic communication.

A method for retrofitting an operating fuel delivery system of a vehicle. The method includes obtaining a vehicle having an operating fuel delivery system, which includes an interconnected fuel tank, a fuel pump and an engine. Obtaining an air separator configured to be attached to the fuel delivery system at a connection point wherein the fuel pump and the engine are in direct fluidic communication and also obtaining attachment means for connecting the air separator to the fuel delivery system by fluidically mounting the air separator at the connection point wherein the fuel pump and the engine are secured in direct fluidic communication.