Abstract: An extended life filter element is provided that may at least double the service interval of a given filtration application utilizing the same or similar filter housing envelope provided. The filter element may include a more open pleated substrate with an efficiency layer and a prefilter on the upstream surface. The filter may be a foam sleeve. One exemplary application is for air filtration of air flow to electrical cabinets on locomotives.

Abstract: A bypass filter cartridge is provided having a low efficiency filter element and a high efficiency filter element oriented in either parallel or series. The low efficiency filter element may comprise pleated filter sheet while the high efficiency filter element may include a tubular ring of depth media with considerable thickness or pleated media of varying types. The filter cartridge may be adapted and configured for use in specialized locomotive oil lubrication circuits with substantial benefit therein.

Abstract: An extended life filter element is provided that may at least double the service interval of a given filtration application utilizing the same or similar filter housing envelope provided. The filter element may include a more open pleated substrate with an efficiency layer and a prefilter on the upstream surface. The filter may be a foam sleeve. One exemplary application is for air filtration of air flow to electrical cabinets on locomotives.

Abstract: A filter for applications such as a lube filter for a large medium speed diesel engine application lube system is provided in which the open end cap carries three different seals including two radial seals that seal radially against a stem pipe in an axial abutment face and a seal gasket that seals against a mounting face of the housing. One of the radial seals is more reliable than the other while the other of the radial seals acts as a redundant backup and safety in the event that there is an improper installation or damage to the other seal as a result thereof.