Agilent, G4267-87012, Needle seat, PEEK, 0.12 mm ID capillary, for G7167A, G7167B

The Agilent PEEK needle-seat assembly is a replacement fluidic part for compatible Infinity II and III multisampler modules, including the G7167A and G7167B platforms. The seat incorporates a 0.12 mm internal-diameter capillary and provides the mating location for the designated autosampler needle assemblies. The PEEK construction and small internal bore make correct mechanical alignment and cleaning particularly important in analytical LC operation. The needle seat is not a complete injection needle, sample loop or switching valve. Select it by multisampler module, corresponding needle design and required fluidic geometry rather than choosing by capillary diameter alone. During service, use the appropriate needle-exchange position, avoid scratching the seating face and handle the narrow flow path without introducing particles. After reassembly, prime the sampling circuit, confirm correct needle contact and sealing, and check injection repeatability, carryover and leakage before restarting unattended sequences.