Abstract: A direct flow filter is provided with an auxiliary filter at one of its upstream and downstream faces and spanning between first and second sets of pleat tips, providing a pre-filter or a secondary filter.

Abstract: A direct flow filter has one or more upstream and/or downstream face seals transversely spanning from one set of pleat tips at least partially towards the other set of pleat tips and laterally spanning adjacent channels.

Abstract: A pleated panel fluid filter filters fluid flowing along an axial flow direction and includes angled panels and/or progressively increasing flow channel width and/or skewed panel projections and/or flattened pleat tip bend lines.

Abstract: A filter is provided by pleated filter media having a plurality of pleats defined by wall segments extending axially along an axial direction along an axis and extending transversely along a transverse direction between first and second sets of pleat tips at first and second sets of axially extending bend lines. The pleated filter media spans laterally along a lateral span along a lateral direction, with the wall segments being spaced from each other by lateral gaps. The pleats have a pleat depth along the transverse direction along the wall segments between the first and second sets of pleat tips. The pleat depth varies as the pleated filter media spans laterally along the lateral direction.

Abstract: Method and apparatus are provided for making a filter element by spinning fibers from one or more dies onto a collector, including designated combinations providing designated filter characteristics.

Abstract: A coalescer has variable characteristics including variable diameter of individual fibers along their length such that an individual fiber has differing diameters at different points along its length, and including variable porosity.

Abstract: A coalescer includes fibrous media capturing droplets of the dispersed phase, coalescingly growing the droplets into larger drops which further coalesce and grow to form pools that drain, and adapted to reduce pressure drop thereacross by increasing dispersed phase drainage therefrom.

Abstract: A filter has multiple pleated filter elements having axially extending channels having a transverse pleat channel height and a lateral channel width. The pleated filter elements have different channel heights.

Abstract: A carbon media filter element with urethane frame and seal has a border member composed of urethane providing a combined structural frame and seal extending along the perimeter and providing both the support frame for the media and a seal along the ends of the media sheet retaining carbon granules between backing layers and preventing escape of carbon granules out of the end. Manufacturing apparatus and methods are provided.

Abstract: A direct flow filter has seal tips alternately sealing upstream and/or downstream ends of wall segments to each other to define first and second sets of flow channels and protecting the ends of the wall segments from damage, including upstream ends from incoming debris, and providing structural support withstanding high flow rates and improving flow by means of the geometry of the seal.