Patent ID: 8440003

Claim:
A liquid degassing apparatus comprising: a degassing module for degassing a liquid conveyed through a chamber thereof, said degassing module including a gas-permeable, liquid-impermeable membrane separating said chamber into a permeate side and a retentate side, wherein said retentate side of said chamber is in liquid communication with a liquid inlet and a liquid outlet for the liquid, and said permeate side of said chamber is in fluid communication with a vacuum port of said degassing module; a vacuum pump fluidly coupled to said vacuum port of said degassing module through a degassing line to evacuate said permeate side of said chamber; a pressure sensor for sensing pressure of said permeate side of said chamber; a controller communicatively coupled to said pressure sensor and said vacuum pump for controlling vacuum pump operation responsive to signals received from said pressure sensor indicating pressure of said chamber; and a pneumatic filtration apparatus fluidly interposed between said vacuum pump and said pressure sensor within said degassing line, said pneumatic filtration apparatus including one or more of a first flow restrictor and a volume exchange chamber defining a volume open to said degassing line, said pneumatic filtration apparatus being capable of attenuating pressure oscillations developed in said degassing line by said vacuum pump, wherein the attenuation provided by said pneumatic filtration apparatus is at least 10%.