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Injection and Switching Valves
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Automatic Switching Valves


Automatic Switching Valves

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Remote communication made incredibly simple with USB and RS-232 inputs standard!

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.



VXH Ultra High Pressure Valves
VXH Ultra High Pressure Valves
Up to 15,000 psi/1000 bar

• Two column selection
• Rapid Replacement Pods

Cat. No. Description
VXH593-888 SS 2 Position, 6 Port Switching Valve
VXH593-983 SS 6 Position, 7 Port Selector
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VXV Analytical High Pressure Valves
VXV Analytical High Pressure Valves
Up to 6000 psi/400 bar

• Online sample prep
• Column backflushing
• Two column selection

Cat. No. Description
VXV5788-000 SS 2 Position, 6 Port Switching Valve
VXV5738-000 SS 2 Position, 10 Port Switching Valve
VXV5758-000 SS 6 Position, 7 Port Switching Valve
VXV5768-000 SS 2 Position, 10 Port Nano Switching Valve
VXV5764-000 SS 2 Position, 10 Port Nano Switching Valve
VXV7788-000 PEEK™ 2-position, 6 Port Switching Valve
VXV7738-000 PEEK™ 2-position, 10 Port Switching Valve
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VXL Low Pressure Valves
VXL Low Pressure Valves
Up to 125 psi/9 bar

• Pre-pump solvent selection
• Post column fraction collection
• Fittingless tubing connection
• Requires only special ferrules to attach to tubing connections

Cat. No. Description
VXL554-260 SS 2 Position, 6 Port Switching Valve
VXL554-223 SS 2 Position, Double 3 Way Valve
VXL554-670 SS 6 Position, 7 Port Selection Valve
VXL555-494 SS 6 Position, 7 Port Large Bore Selection Valve
VXL554-269 SS 2 Position, 6 Port Large Bore Valve
VXL556-483 SS 10 Position, 11 Port Selection Valve
Special Replacement Ferrules
Cat. No. Description UOM
77825 SS Ferrules for 1/8" OD Tubing 25
77825 SS Ferrules for 1/8" OD Tubing 50
77850 SS Ferrules for 1/16" OD Tubing 25
7777-165 SS Ferrules for 1/16" OD Tubing 50
7770-166 O-Rings for 1/16" OD Tubing 25

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