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HPLC Injection and Switching Valves
Due to their compact dimensions, KNAUER valves need very little bench space. Valves are ubiquitous in all HPLC applications. 2-position valves are used mostly for injections, but can be used for complex switching systems as well. Multi-position valves are used for fraction collection, eluent selection or column switching.
KNAUER valve drives feature a short switching time of 150 ms to reduce pressure surges during a run. There are multiple ways of control: directly via keypad on the device, via software with LAN or RS-232 connection or via analog control.
Electrically Driven Valves
Depending on your requirements you can chose between 2-position or multi-position valves:
2-position valves are used mostly for injections, but can be used for complex switching systems as well. All ports are located in peripheral positions. The channels always connect two of these ports.
Multiposition valves are used for fraction collection, eluent selection or column switching. They have an extra port in a central position and one channel which connects the central port to one of the peripheric ports.
If more than one valve is needed for your application, it might be helpful two combine these as units in one stackable AZURA ASM 2.1L device.