Injection & Switching

Flexible Automation
The VX modular valves are flexible to meet changing needs. Several options are available for connecting the valves to your analytical instrument or PC, including contact closure, BCD, serial and USB. VX valves can be controlled remotely or operated manually using the push button front panel with LED position indicator.

Increase Laboratory Capability
The VX Series II modules are available in a variety of flow paths including options for Nano, Semi-prep, Low Pressure and Ultra High Pressure applications up to 15,000 psi/1000 bar. Each port has minimal port-to-port volume of 0.3 µl.

Reduce Downtime
The High Pressure and Fast Chromatography VX modular valves feature the Rapid Replacement Pod™ design for easy maintenance. The Rapid Replacement Pod is a complete,factory assembled and tested liquid-end, providing virtually zero downtime maintenance. Traditional RheBuild® kits are also available.

The Low Pressure VX modular valves make changing fluidic connections quick and easy with a patented fitting-less tubing connection system. These long-life polymer valves meet the reliability needs of demanding applications.

Two Column Selection
Column selection allows multiple users to select methods using the correct column for their assay and to conveniently washout and store columns. Columns are stored in the solvent of choice and require no manual changes. Different types of samples can run at night and over weekends using different methods, resulting in better utilization of existing equipment and increased productivity.

Column Backflushing
Column backflushing is an analytical method in which a switching valve reverses the flow through a column. This method allows automatic clean up of a column without disconnection in situations where sample mixture is trapped on the head of a column. Rather than force highly retainedcompounds through the full length of the column, the reversed flow permits the elution of compounds in a shorter time period.

Enrichment
On-line sample clean up and enrichment uses a pre-column connected to an analytical column by use of a switching valve. Automation has advantages over offline techniques. On-line analysis improves analytical precision and reduces solvent volumes, since LC pumps meter the flow rates and the volumes of mobile phase passed through both columns. This on-line procedure can enhance productivity by allowing automated, unattended processing of large numbers of samples, using an autosampler and a switching valve connected to the controller of the chromatography.

Alternating Regeneration
Alternating column regeneration using two matched columns can increase sample throughput. This timesaving process involves equilibrating one column while using the other for analysis. A switching valve enhances the convenience of column regenerating by switching between the analyzing column and the equilibrating column. Column regeneration is beneficial for laboratories running large quantities of samples for such applications as drug discovery and quality assurance.

Multi-Dimensional
On-line sample clean up and enrichment uses a pre-column connected to an analytical column by use of a switching valve. Automation has advantages over offline techniques. On-line analysis improves analytical precision and reduces solvent volumes, since LC pumps meter the flow rates and the volumes of mobile phase passed through both columns. This on-line procedure can enhance productivity by allowing automated, unattended processing of large numbers of samples, using an autosampler and a switching valve connected to the controller of the chromatography.