Filter arrangement and methods

A filtration system comprising:

• (a) a tube sheet having at least a single cavity;
• (b) a filter housing removably and replaceably mounted in said cavity;
• (i) said filter housing including an outer cylindrical wall having a central axis, a first housing end, a second housing end, a transition area between said first housing end and said second housing end, and a mounting flange;
• (A) said first housing end being circular with a first radius;
• and said second housing end being circular with a second radius;
• (1) said first radius being larger than said second radius;
• (B) said transition area being angled relative to the central axis;
• (C) said mounting flange engaging said tube sheet to allow said filter housing to be mounted within said cavity of said tube sheet;
• (c) a filter assembly secured within said filter housing, said filter assembly having opposite first and second ends and a plurality of flutes;
• (i) each of said flutes having a first end portion adjacent to said filter assembly first end, and a second end portion adjacent to said filter assembly second end;
• ( A) selected ones of said flutes being open at said first end portion and closed at said second end portion;
• and selected ones of said flutes being closed at said first end portion and open at said second end portion;
• and
• (d) a seal member circumscribing said filter assembly;
• (i) said seal member beings compressed between and against said transition area of said housing and an outer radial portion of said filter assembly to form a seal between said housing and said filter assembly.

A method of servicing an air filtration system for a gas turbine system;

• the method comprising:
• (a) removing a filter assembly from a filter housing by grasping a pull mechanism;
• the filter housing being mounted through a cavity in a tube sheet;
• (i) the filter housing including an outer cylindrical wall having a central axis, a first housing end, a second housing end, and a transition area between the first housing end and the second housing end;
• (A) the first housing end being circular with a first radius;
• and the second housing end being circular with a second radius;
• (1) the first radius being larger than the second radius;
• (B) the transition area being angled relative to the central axis;
• and
• (b) replacing the filter assembly with a second filter assembly by pressing the second filter assembly within the filter housing until it is secured within the filter housing;
• the second filter assembly having opposite first and second ends;
• and a plurality of flutes;
• (i) each of the flutes having a first end portion adjacent to the filter assembly first end, and a second end portion adjacent to the filter assembly second end;
• and
• (A) selected ones of the flutes being open at the first end portion and closed at the second end portion;
• and selected ones of the flutes being closed at the first end portion and open at the second end portion;
• (ii) the step of replacing including forming a seal by compressing a seal member between and against the transition area of the filter housing and a portion of the second filter assembly.