Esta buscando: Válvulas de selección

Multiple columns in the selection valve allow you to apply different analytical methods while using the same instrument. The common port of this valve connects to the injector. Turning the valve handle directs the flow into one of the columns connected to the peripheral ports. A second valve is placed at the column outlets to select the operating column effluent and direct it to the detector. The valve has a spring-loaded detent mechanism that allows for continuous rotation in either direction.