Agilent Technologies InfinityLab LC Series - Page 20

Agilent InfinityLab LC Series Vialsamplers User Manual 20
1Introduction
Operating Principle
When the sample sequence begins, the valve unit switches to the bypass
position (see
Figure 5 on page 20). Solvent from the pump enters the valve unit at
port 1, and flows directly to the column through port 6.
Figure 5Valve in bypass - needle in vial, metering device aspirates sample volume
Vial
Wash
port
Needle
seat
Sampling loop
Solvent
Wash
pump
Metering
device