Filter cartridge; components thereof; and methods
Z-filters capable of cleaning particulate matter from airflow streams in dust collectors, including reverse flow, reverse air, and reverse pulse systems.
1. An air filter cartridge comprising:
(a) a coiled media pack having a first flow face and an opposite second flow face; the media pack including:
(i) a set of inlet flutes open at the first flow face to passage of air to be filtered therein;
(ii) a set of outlet flutes open at the second flow face;
(iii) the media pack being closed to flow of unfiltered air into the first flow face and then outwardly from the second flow face without filtering;
(b) the media pack having first and second rounded ends with first and second straight sides in complete extension therebetween;
(i) the media pack having a length extending along a straight line from a center of the first rounded end to a center of the second rounded end;
(i) the media pack having a first width between the first and second straight sides; the first width being perpendicular to the length;
(ii) the media pack having a second width thereacross extending between portions of one of the first and second rounded ends; the second width being perpendicular to the length; and
(iii) wherein the first width is narrower than the second width.
2. An air filter cartridge according to claim 1 further comprising:
(a) a non-circular core; the media pack being wound around the core.
3. An air filter cartridge according to claim 2 wherein:
(a) the core is generally sector-shaped.
4. An air filter cartridge according to claim 1 wherein:
(a) the first flow face is planar.
5. An air filter cartridge according to claim 1 wherein:
(a) the coiled media pack includes fluted sheet secured to a facing sheet.
6. An air filter cartridge according to claim 1 further comprising:
(a) a wedge-shaped core; the media pack being wound around the core.
7. An air filter cartridge according to claim 1 wherein:
(a) the first and second flow faces are planar.
8. An air filter cartridge according to claim 1 wherein:
(a) the media pack has a third width thereacross extending between portions of the other of the first and second rounded ends; the third width being perpendicular to the length; and
wherein the third width is narrower than the first width.
9. An air filter cartridge comprising:
(a) a coiled media pack having a first flow face and an opposite second flow face; the media pack including:
(i) a set of inlet flutes open at the first flow face to passage of air to be filtered therein;
(ii) a set of outlet flutes open at the second flow face;
(iii) the media pack being closed to flow of unfiltered air into the first flow face and then outwardly from the second flow face without filtering;
(b) the media pack having first and second rounded ends with first and second straight sides in complete extension therebetween;
(c) a non-circular core; the media pack being wound around the core; the core having first and second opposite core ends, and first and second opposite sides extending between the first and second core ends;
(i) the core having a length from the first core end to the second core end; and
(ii) the core having a non-constant width extending between the first and second opposite sides and perpendicular to the length.
10. An air filter cartridge according to claim 9 wherein
(a) the coiled media pack includes fluted sheet secured to a facing sheet.
11. An air filter cartridge according to claim 9 wherein:
(a) the first and second flow faces are planar.
12. An air filter cartridge according to claim 9 wherein:
(a) the first rounded end has a greater radius than the second rounded end.
13. An air filter cartridge according to claim 9 wherein:
(a) the core is wedge-shaped.
14. An air filter cartridge according to claim 9 wherein:
(a) the first flow face is planar.
15. An air filter cartridge according to claim 9 wherein:
(a) the second flow face is planar.