Knauer injection and switching valves are available as 6-port/3-channel, 6- port/2-channel, 7-port/1-channel, 13-port/1-channel or 17-port/1-channel valves made out of stainless steel (pressure stable up to 300 bar) or PEEK (pressure stable up to 200 bar) with 1/16” or 1/8” connections.
The valves are extremely robust and can be easily mounted on the HPLC systems with the optional universal bracket which can hold also the LC column.
Switching valves provide flexible solutions for column switching, sample enrichment on separate adsorption units and fraction collection.
Azura V 2.1S electric valve drives from KNAUER provide the possibility of automating the operation of all switching and injection valves. The ports of the electric valve drive can be freely positioned by either a short circuit contact or through software via RS-232 serial connection.
Injection valves can be switched automatically between the LOAD and INJECT positions. All electrically driven injection and switching valves also can be ordered separately without drive; this guarantees economical replacements and service.