Coalescence element and filter element having a coalescence element

A filter element comprising:

• a raw side and a clean side and a flow path for a fluid to be filtered in a flow direction from the raw side to the clean side;
• at least one filter bellows comprising oppositely positioned end faces;
• end disks fluid-tightly connected to the oppositely positioned end faces of the at least one filter bellows;
• at least one support pipe arranged coaxially inside the at least one filter bellows,
• the at least one support pipe connected to the end disks,
• wherein the at least one support pipe comprises
• passages allowing the fluid to be filtered to pass through the at least one support pipe;
• at least one coalescence element embodied as a single layer formed as a cylindrical jacket and comprising
• a fluid path for the fluid to be filtered between an inlet side and an outlet side of the cylindrical jacket,
• the coalescing element comprising:
• at least one coalescence medium configured to coalesce water contained in the fluid to be filtered and comprised of a material with a packing density of at most 10%:
• wherein the at least one coalescing medium is made of staple fibers of polyester, viscose or a combination thereof;
• wherein the staple fibers of the at least one coalescing medium are reinforced fibers, reinforced by needling;
• wherein the at least one coalescing medium has an average pore size of at least 100 μm;
• and
• wherein the at least one coalescing medium has an air permeability of greater than 1500 l/cm2h and less than or equal to 4,500 l/cm2h;
• wherein the cylindrical jacket of the at least one coalescence element is arranged between the at least one filter bellows and the at least one support pipe in the flow direction and surrounds the at least one support pipe at a radial outer side of the at least one support pipe.

A filter system for filtering a fluid, the filter system comprising:

• a filter housing;
• a filter element arranged in the filter housing and comprising
• a raw side and
• a clean side and
• a flow path for a fluid to be filtered in a flow direction from the raw side to the clean side;
• wherein the filter element comprises
• at least one filter bellows comprising oppositely positioned end faces,
• wherein the end disks are fluid-tightly connected to the oppositely positioned end faces of the at least one filter bellows;
• wherein the filter element further comprises
• at least one support pipe arranged coaxially inside the at least one filter bellows, the at least one support pipe connected to the end disks,
• wherein the at least one support pipe comprises passages allowing the fluid to be filtered to pass through the at least one support pipe;
• wherein the filter element further comprises
• at least one coalescence element embodied as a single layer formed as a cylindrical jacket and comprising
• a fluid path for the fluid to be filtered between an inlet side and an outlet side of the cylindrical jacket,
• the coalescing element comprising:
• at least one coalescence medium configured to coalesce water contained in the fluid to be filtered and comprised of
• a material with a packing density of at most 10%;
• wherein the at least one coalescing medium is made of staple fibers of polyester, viscose or a combination thereof;
• wherein the staple fibers of the at least one coalescing medium are reinforced fibers, reinforced by needling;
• wherein the at least one coalescing medium has an average pore size of at least 100 μm;
• and
• wherein the at least one coalescing medium has an air permeability of greater than 1500 l/cm2h and less than or equal to 4,500 l/cm2h;
• wherein the cylindrical jacket of the at least one coalescence element is arranged between the at least one filter bellows and the at least one support pipe in the flow direction and surrounds the at least one support pipe at a radial outer side of the at least one support pipe;
• wherein the at least one coalescence element of the filter element is arranged at a clean side of the filter element.