VARIABLE INLET AIR RESTRICTION FOR COMPOSITION CONTROL OF PRODUCT GAS

摘要

A controller system for a molecular sieve device controls a product gas generated by n molecular sieve beds (BED1, BED2) for separating a gas from a n input gas supply (INLET). A valve assembly (V1) with n states has an input (10) receiving the input gas and n outlets (11, 12, 13). Each valve state in a first position creates an open passageway (14) from the input (10) of the slide valve to an outlet (11). Transitioning a valve (V1) from the first to a second position (POS A, POS B) creates a variable amount of restriction in the flow of gas between the inpu t (10) and a selected outlet.