Patent ID: 6953498
Filing Date: 2005-10-11
Classification: B01D

Abstract:
1. An adsorption gas dryer having a first drying tower and a second drying tower, each having a first port and a second port through which gas can pass into or out of the tower, a first manifold and a second manifold connected respectively to the first and the second ports of both towers, the manifolds each including integral gas passages, each port of the towers being in communication with a gas passage, and the manifolds each including at least one integral valve seat upon which a valve actuator is mounted to constitute a valve for controlling flow of gas through the gas passages wherein the second manifold has two exhaust valves for controlling purge gas; wherein each manifold is formed as an identical casting; and wherein the position in the casting occupied by the exhaust valves in the second manifold is left vacant in the first manifold.