Patent ID: 7153341

Claim:
A process for controlling the volume of the flow of dry air, dried to a predetermined degree of dryness, emanating from a sweep manifold of an air dryer system, flowing over a plurality of gaseous/liquid fluid separating membranes of said air dryer system, said process comprising: a. diverting a predetermined volume of dried air, at a predetermined pressure, to a sweep manifold; b. sensing one of the flow volume and the humidity values of the remainder of said dried air and converting said one of said flow volume and humidity values to electrical signals, and; c. using a controller, for achieving the predetermined degree of dryness of said air, and utilizing said electrical signals for controlling at least one solenoid valve which in turn controls the flow volume of said predetermined volume of dried air diverted to said sweep manifold; wherein said sensing is the sensing of said flow volume and said controller controls at least two solenoid valves associated with different sized orifices, respectively.