Patent ID: 7243679

Claim:
A directional flow control valve assembly for an adsorbent fractionator, comprising: a first inlet valve; a second inlet valve; a first exhaust valve; a second exhaust valve; and a valve body, comprising: at least one inlet port pneumatically coupled to a first valve chamber and to a second valve chamber; a first exit port pneumatically coupled to the first valve chamber; a first mounting interface for coupling the first inlet valve to the valve body; a second exit port pneumatically coupled to the second valve chamber; a second mounting interface for coupling the second inlet valve to the valve body; at least one exhaust port pneumatically coupled to a third valve chamber and to a fourth valve chamber; a third mounting interface for coupling the first exhaust valve to the valve body; a fourth mounting interface for coupling the second exhaust valve to the valve body; and a fifth mounting interface for an inlet manifold; wherein the third valve chamber is pneumatically coupled to the first valve chamber, the fourth valve chamber is pneumatically coupled to the second valve chamber, and the valve body comprises a single unitary piece.