Patent ID: 7814934

Claim:
A directional flow control valve assembly for an adsorbent fractionator, comprising: a first inlet check poppet valve; a second inlet check poppet valve; a first outlet check poppet valve; a second outlet check poppet 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 check poppet 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 check poppet valve to the valve body; at least one outlet port pneumatically coupled to a third valve chamber and to a fourth valve chamber; a third mounting interface for coupling the first outlet check poppet valve to the valve body; a fourth mounting interface for coupling the second outlet check poppet 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.