FOREACH 2-position, 6-port high-pressure rotary valve for HPLC sample-loop loading and injection, with a separate vent path

0.8 μL is the internal valve volume. Full-loop injection requires enough sample to displace the liquid in the loop, and the loop primarily determines the volume entering the analysis path. Partial-loop injection relies on the sample-loading mechanism to meter the sample into an appropriately sized loop. Select the method using available sample volume, repeatability and method requirements; excess sample loaded is not necessarily all injected.

The system name alone is not sufficient. 25 MPa is this model's maximum working pressure. Compare steady-state and transient switching pressures with the ratings of the tubing, sample loop and fittings. The lowest-rated component limits the complete circuit.

Check tubing outside diameter, fitting-end geometry, insertion depth and seals as well as the thread. Matching threads alone do not establish compatible connection geometry or a reliable high-pressure seal.

Check loop filling, air bubbles in the sample or mobile phase, valve position, injection dwell time, connection leaks and rotor-seal wear. Injection repeatability is a result of the complete sample-injection circuit and cannot be inferred from valve switching time alone.

This model uses a SUS316L stator and a polymer rotor. Check compatibility with solvent composition, concentration, temperature and cleaning conditions. The specification's 150,000-cycle figure comes from testing with pure water and is not a service-life guarantee for every fluid.