Patent ID: 7081145

Claim:
An arrangement for use in separating a hydrophobic liquid aerosol phase, from a gas stream, during filtration of engine crankcase gases by passage of the gas stream into a first stage coalescer filter and then into a upstream surface of a second stage filter; the arrangement comprising: (a) a cylindrically shaped first stage coalescer filter having a framework defining a first upstream face, a second, opposite, downstream face and a closed outer periphery; (i) the first stage coalescer filter having a flow passageway extending therethrough from the first upstream face to the second downstream face; (ii) an upstream open screen at said upstream face and an opposite downstream open screen at the downstream face; (iii) a non-pleated, non-woven fibrous bundle positioned in the flow passageway between the upstream open screen and the downstream open screen; and, circumscribed by the closed outer periphery of the framework; and (b) a second stage filter comprising media configured in a cylinder and having an upstream surface for receiving gas flow from the first stage coalescer filter; the upstream surface having a second upstream surface area; (i) the area of first upstream surface being no more than about 10% of the area of second upstream surface; and (ii) the cylinder of media being potted in, and extending between, first and second, opposite, polymeric end caps; (A) said first end cap having a radial seal portion thereon.