
Contents
Vanquish Pumps (VH-P10-A-02) Operating Manual Page 7
6.9 Optimizing the Performance of the Pump..........................................................101
6.9.1 General Guidelines.................................................................................101
6.9.2 Gradient Delay Volume, Dwell Volume, and Ripple ..............................102
6.9.3 Installing Solvent Shut Off Valves ..........................................................109
6.10 Shutting Down the Pump....................................................................................111
6.10.1 Short-Term Shutdown (Interruption of Operation)...............................111
6.10.2 Long-Term Shutdown.............................................................................112
7 Maintenance and Service ..............................................................115
7.1 Introduction to Maintenance and Service..........................................................116
7.2 Safety Guidelines for Maintenance and Service.................................................117
7.3 General Rules for Maintenance and Service ......................................................119
7.4 Routine and Preventive Maintenance ................................................................120
7.4.1 Maintenance Plan ..................................................................................120
7.4.2 Flushing the Pump .................................................................................122
7.4.3 Cleaning or Decontaminating the Pump................................................124
7.4.4 Predictive Performance .........................................................................126
7.5 Seal Wash System ...............................................................................................128
7.5.1 Testing the Seal Wash System for Leakage............................................128
7.5.2 Replacing the Seal Wash Lines...............................................................129
7.5.3 Replacing the Seal Wash Detector.........................................................132
7.6 Y-Connector ........................................................................................................134
7.7 Pump Head..........................................................................................................136
7.7.1 Overview of Pump Head Parts...............................................................137
7.7.2 Replacing the Pump Head......................................................................138
7.7.3 Replacing the Pistons .............................................................................142
7.7.4 Cleaning the Piston ................................................................................145
7.7.5 Replacing the Piston Seals or Support Ring ...........................................146
7.7.6 Recommendations for New Piston Seals ...............................................151
7.7.7 Replacing the Seal Wash Seals...............................................................153
7.7.8 Replacing the Pump Head Seals.............................................................158
7.7.9 Testing the Piston Seals for Leakage......................................................161
7.8 Check Valves .......................................................................................................163
7.8.1 Replacing the Inlet Check Valves ...........................................................163
7.8.2 Replacing the Outlet Check Valves ........................................................165
7.8.3 Cleaning the Check Valves .....................................................................166