The FCV-11ALS is used for one unit. It can be controlled from the LC-20AP/20AR front panel directly or through a system controller CBM-20A/20Alite and workstation software.
These solenoid valve units can automatically switch between two solvents (e.g., mobile phase and column rinse solvent) plumbed to one solvent delivery unit. The FCV-11AL can handle the automatic selection of solvents for up to three solvent delivery units whereas the FCV-11ALS is used for one unit.
Shimadzu: Shimadzu FCV-11ALS Reservoir Selection Valves (New)
