Abstract: The disclosure relates to a fuel filter assembly, a filter element, and a method of draining water from a fuel filter assembly. The fuel filter assembly comprises a filter element with a water collecting space; the filter element being connected to a fuel pipe for feeding an upstream side of the filter element with fuel and for providing filtered fuel from a downstream side of the filter element to a combustion engine or parts thereof; a fuel pump arranged downstream from the filter element, wherein the fuel pump can be operated in a first mode for drawing fuel through the filter element and in a second, reverse mode for feeding fuel back to the filter element; a one-way fuel valve arranged upstream of the filter element allowing for flow towards the upstream side of the filter element; a pressure-actuated one-way drain valve in communication with the water collecting space.

Abstract: The disclosure relates to a fuel filter assembly, a filter element, and a method of draining water from a fuel filter assembly. The fuel filter assembly comprises a filter element with a water collecting space; the filter element being connected to a fuel pipe for feeding an upstream side of the filter element with fuel and for providing filtered fuel from a downstream side of the filter element to a combustion engine or parts thereof; a fuel pump arranged downstream from the filter element, wherein the fuel pump can be operated in a first mode for drawing fuel through the filter element and in a second, reverse mode for feeding fuel back to the filter element; a one-way fuel valve arranged upstream of the filter element allowing for flow towards the upstream side of the filter element; a pressure-actuated one-way drain valve in communication with the water collecting space.

Abstract: A liquid filter construction comprising a filter housing is disclosed. The filter housing contains a filter element for filtration of liquids using a urea aqueous solution. A compressible element is positioned within the filter housing, the compressible element comprising an enclosure containing a gas-filled volume. This compressible element compresses in response to the generation of pressure from freezing of liquid within the filtration housing. The compression of the compressible element thereby avoids damage to the filter element, the filter housing, and adjacent equipment.

Abstract: A liquid filter cartridge comprising an outer casing defining an inside volume containing a filter element that separates the inside volume into an upstream space and a downstream space, the casing having an end wall defining a liquid inlet passage communicating with the upstream space, and a liquid outlet passage communicating with the downstream space, the casing being adapted for mounting on a support that includes a liquid inlet channel designed to communicate with the inlet passage, a liquid outlet channel designed to communicate with the outlet passage, and a drain channel communicating with the inlet passage. The cartridge includes a closure member fastened to the end wall of the casing and adapted to close the drain channel when the cartridge is mounted on the support.

Abstract: A liquid filter construction comprising a filter housing is disclosed. The filter housing contains a filter element for filtration of liquids using a urea aqueous solution. A compressible element is positioned within the filter housing, the compressible element comprising an enclosure containing a gas-filled volume. This compressible element compresses in response to the generation of pressure from freezing of liquid within the filtration housing. The compression of the compressible element thereby avoids damage to the filter element, the filter housing, and adjacent equipment.

Abstract: A liquid filter cartridge comprising an outer casing defining an inside volume containing a filter element that separates the inside volume into an upstream space and a downstream space, the casing having an end wall defining a liquid inlet passage communicating with the upstream space, and a liquid outlet passage communicating with the downstream space, the casing being adapted for mounting on a support that includes a liquid inlet channel designed to communicate with the inlet passage, a liquid outlet channel designed to communicate with the outlet passage, and a drain channel communicating with the inlet passage. The cartridge includes a closure member fastened to the end wall of the casing and adapted to close the drain channel when the cartridge is mounted on the support.

Abstract: This invention relates to a reusable filter unit for an internal combustion engine wherein the filter fulfills both a filtering function and an additive function, the filter including a filtering part with replaceable filtering media and an additive part adapted to receive replaceable chemical additives. The filter part includes a generally toroidal shaped plastic element for receiving a generally cone shaped replaceable filter media, which can be agglomerated fiber, the element fitting into, and permanently bonded to, an outer shell, with the additive part being located below the element.

Abstract: A self-venting valve apparatus using a valve stem rotatably and slidably mounted to a vessel by a collar is disclosed. The stem includes threads at the top and base of the stem which matingly engage internal threads of the collar to hold the stem open or closed. A single gasket seals the gas inlet and liquid outlet in the closed configuration. To drain the fluid, the valve stem is unscrewed so the bottom threads disengage from the collar, the valve stem lowers until the top threads of the valve stem engage the collar, and the top threads are screwed to the collar to secure the valve in the open position. Fluid begins draining through the central passage of the valve stem before gas enters the vessel through the groove in the sidewall of the valve steam to allow proper siphoning. The lower end of the liquid drain passage is placed below the lower end of the air inlet groove, thereby insuring that the liquid drain passage is opened first as the valve stem is lowered.