Maintaining Your Aijiren Series HPLC System Ensuring optimal performance and results. 1 Section 1: Manual Injection Valves 5 Sample Loops 7 Section 2: Autosampler Maintenance 8 Injection Valve Maintenance 9 Exchanging the Needle/Needle Seat 12 Autosampler Parts and Supplies 15 Section 3: Fraction Collectors 16 Analytical and Preparative