With the valve in Position A, sample flows through the external loop while the carrier flows directly through to the chromatographic column. When the valve is switched to Position B, the sample contained in the sample loop and valve flow passage is injected onto the column.
INJECTORS, SELECTORS, AND VALVES (Which one do I need?) ACTUATORS FITTINGS PRODUCTS FOR GC LIQUID HANDLING ADDITIONAL PRODUCTS UHPLC / NANO LC
PRODUCT SUPPORT VALVE APPLICATIONS CHROMATOGRAMS GENERAL REFERENCE UNIT CONVERSION REGULATORY SUPPORT