Patented Upchurch Scientific® 6-Way Medium Pressure Selection Valves have a common inlet (or outlet) port connected to six different ports. Use these valves to select between multiple solvent reservoirs without having to disconnect and reconnect lines. Or, use two valves in conjunction with each other to serve as a column selection system in a moderate pressure semi-prep or high-flow analytical application. These ceramic valves are ideal for biocompatible instrumentation and can be used in flash chromatography for the preparation of proteomics samples.
Two biocompatible selection valve options are available:
Featuring ceramic-to-ceramic sealing surfaces, these new long-life valves have been tested to over one million actuations with no change in performance. (Tested using room-temperature water as the solvent.) The wetted materials are chemically resistant ceramic and PEEK™ polymer and the valves are rated to 500 psi (34 bar). Each valve includes 1/4-28 Flangeless Fittings for 1/16" OD tubing.
These economical valves have chemically resistant Vespel® and PTFE resin wetted surfaces and are rated for a maximum pressure of 1,000 psi (69 bar). Each valve includes 1/4-28 Flangeless Fittings for 1/16" or 1/8" OD tubing.
If your application does not require all six outer ports, seal the extra port(s) with any flat-bottom 1/4-28 plug.
Both valve options are available in three configurations: standard manual, bulkhead mountable manual and actuated.
Please contact Upchurch Scientific for custom configurations for instrument manufacturers. High pressure selection valve options are available.
Use our 6-Way Medium Pressure Selection Valve to easily select different solvents with an isocratic pump. The setup below involves an isocratic pump used for two separate assays, each requiring a pre-rinsing step prior to use. Using our Selection Valve in this setup, the system can be primed with the solvent in the first reservoir. Then, solvent from the second reservoir can be used as the mobile phase for the first application. Later, the system can be rinsed with an intermediate buffer solution from the third reservoir, followed by switching over to the second mobile phase in reservoir number 4. At the end of the day, the system can be rinsed with water from a fifth reservoir to avoid the possibility of precipitation on wetted surfaces. Follow this rinse with a final rinse of methanol from the sixth reservoir for system storage.