Importance

Loading Importance Indicators...

Abstract

In a valve assembly exhibiting zero dead volume the port head is mounted on a solenoid and defines an inlet port on one side of the valve seat, and two outlet ports on the opposite side of the valve seat. A flexible diaphragm is seated across the valve seat between the port head and the solenoid, and is sealed along its peripheral edge. A spring-biased valve rod is coupled to the opposite side of the diaphragm relative to the valve seat, and the solenoid is actuated to move the valve rod and diaphragm between open and closed positions. The valve assembly is opened by actuating the solenoid to drive the valve rod and diaphragm away from the valve seat and permit the passage of fluid across the valve seat between the inlet and outlet ports. The valve assembly is then closed by de-energizing the solenoid, which in turn permits the spring-biased valve rod and diaphragm to move into engagement with the valve seat to prevent the passage of fluid across the valve seat between the inlet and outlet ports, and to permit the passage of fluid between the two outlet ports.

Loading the Abstract Image...

First Claim