Patent ID: 7614390

Claim:
A two stage drainage gas-liquid separator assembly comprising: a housing having a flowpath therethrough from upstream to downstream, said housing having an inlet for receiving a gas-liquid stream, and an outlet for discharging a gas stream; an inertial gas-liquid impactor separator in said housing comprising one or more nozzles accelerating said gas-liquid stream therethrough, and an inertial impactor in the path of said accelerated gas-liquid stream and causing liquid particle separation from said gas-liquid stream; a coalescer filter in said housing downstream of said inertial gas-liquid impactor separator and effecting further liquid particle separation, and coalescing separated liquid particles; first and second drain ports in said housing, said first drain port draining liquid from said inertial gas-liquid impactor separator, said second drain port draining liquid from said coalescer filter; wherein said housing comprises: a first plenum at said inertial gas-liquid impactor separator, said first plenum having a lower portion providing a first drainage collection chamber, and an upper portion for receiving gas from said inertial gas-liquid impactor separator; a second plenum at said coalescer filter, said second plenum having a lower portion providing a second drainage collection chamber, and an upper portion passing gas therethrough from said coalescer filter to said outlet; an auxiliary bypass passage from said upper portion of said first plenum to said upper portion of said second plenum for passing gas from said inertial gas-liquid impactor separator through said upper portion of said first plenum then through said auxiliary bypass passage then through said upper portion of said second plenum to said outlet.