Patent ID: 7854794

Claim:
A chemical treatment system comprising: a pair of beds, with each of said beds having at least one connection to receive a source of gas, and an outlet for delivering gas downstream, and each of said beds including chemical treatment elements; a first connection to a source of a gas to be treated, and a second connection for receiving treated gas to be delivered to a downstream use, a third connection to a source of a cleaning gas, and a fourth connection to deliver the cleaning gas downstream; a single rotary valve for selectively connecting one of said source of gas to be cleaned to a first of said beds, and connecting said treated gas to said first bed, and at the same time connecting said source of cleaning gas to a second of said beds, and connecting said, connection for delivering the cleaning gas downstream from said second bed, while said first bed is in a cleaning mode and said second bed is in a being cleaned mode, and said single rotary valve including a rotary actuator for rotating said valve to selectively switch each of said first and second beds between said cleaning and being cleaned modes; said single rotary valve includes at least four valve elements, with one of said valve elements being connected to each of said four connections; and each of said valve elements are ball shaped.