The S 6015 is a stainless steel 2-position valve with needle injection port on the top side. The 6115 is the identical valve with inert PEEK stator. These valves feature the No-Flow-Interruption (NFI) technology which reduces pressure spikes during position switching to a minimum. The needle port can be used with any autosampler system. The direct injection into the valve makes a separate injection port unnecessary. A variety of rotor seal materials are available to cover any type of application.