Diaphragm valve with sealing assembly, chromatographic system including same and method of operation thereof

摘要

A valve having a valve cap with a plurality of process conduits extending therethrough, each one of the plurality of process conduits ending in a process port at a valve cap interface. The valve also has a valve body defining a valve body interface facing the valve cap interface, a diaphragm positioned between the valve cap interface and the valve body interface, across the process ports, and a purge line provided through one of the valve cap and the valve body. The valve further comprises a sealing assembly located in the valve body. The sealing assembly is configured and positioned to block fluid leaked through the diaphragm such that the fluid leaked through the diaphragm is discharged via and exit of the purge line of the valve. A chromatographic system including the valve and a method of operation thereof are also provided.

主权项

1. A valve comprising:
a valve cap having a plurality of process conduits extending therethrough, each one of the plurality of process conduits ending in a process port at a valve cap interface; a valve body defining a valve body interface facing the valve cap interface, the valve body comprising an upper section and a lower section; a diaphragm positioned between the valve cap interface and the valve body interface, across the process ports; a purge line provided through one of the valve cap and the valve body, the purge line having an entry and an exit; a plurality of plungers, each one of the plurality of plungers being positioned in a corresponding plunger passage of a plurality of plunger passages formed in the valve body and being movable between a closed position where the plunger engages the diaphragm, and an open position where the plunger is disengaged from the diaphragm; an actuation system for moving each one of the plurality of plungers between the closed position and the open position, the actuation system comprising an upper piston and a lower piston actuated by an actuating mechanism; and a sealing assembly located in the valve body, the sealing assembly at least partially extending between the upper section and the lower section of the valve body and being configured and positioned to prevent fluid leaked through the diaphragm from leaking into the actuating mechanism of the actuation system, such that the fluid leaked through the diaphragm is discharged via the exit of the purge line of the valve.