Patent ID: 6457485
Filing Date: 2002-10-01
Classification: B01D,F16K,Y10T

Abstract:
A rotary valve assembly for a pressure swing adsorption system, comprising:a first valve member and a second valve member relatively rotatable about a common center of rotation to provide valving action for selectively transferring fluids therethrough, said second valve member having a first fluid section with at least one aperture adapted for transferring a first fluid of a first pressure and composition therethrough and a second fluid section with at least one aperture adapted for transferring a second fluid of a second pressure and composition therethrough, said first valve member having a first fluid section with at least one passage for transferring said first fluid and a second fluid section with at least one passage for transferring said second fluid, and a vent located between said first fluid sections and said second fluid sections of the valve assembly and vented to a pressure lower than the pressures of said first and second fluids so as to vent leakage from either of said sections of the valve assembly.