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Valveless “LIVE” Column Switching

Valveless “LIVE” Column Switching. s. MAY-02. 0 | 8. 3. 1. 2. EPC 1. EPC 2. 4. 3. 2. 1. Pre Column. Main Column. Detector. 4. Needle Valve or Restrictor. Needle Valve or Restrictor. Split & Backflush Vent. Vent or Detector. Valveless Column Switching BACKFLUSH.

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Valveless “LIVE” Column Switching

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  1. Valveless “LIVE” Column Switching s MAY-02 0 | 8

  2. 3 1 2 EPC 1 EPC 2 4 3 2 1 Pre Column Main Column Detector 4 Needle Valve or Restrictor Needle Valve or Restrictor Split & Backflush Vent Vent or Detector Valveless Column SwitchingBACKFLUSH BACKFLUSH “Cross” Coupling Piece Backflush: EPC 1 Constant: EPC 2 MAY-02 1 | 8

  3. EPC 1 EPC 2 EPC 2 EPC 1 Ambient Ambient Valveless Column SwitchingBACKFLUSH BACKFLUSH Backflush Off: From Pre to Main column Backflush On: Pre Column flow reversed Backflush On: Backflush Pre Column EPC1 < EPC 2 Backflush Off: Pre to Main Column EPC1 > EPC 2 MAY-02 2 | 8

  4. 6 3 2 1 4 EPC 1 EPC 2 EPC 3 5 3 5 1 2 Pre Column Main Column Detector 4 6 Needle Valve or Restrictor Needle Valve or Restrictor Split & Backflush Vent Vent or Detector Vent or Detector Valveless Column SwitchingBACKFLUSH & HEART CUT BACKFLUSH & HEART CUT LIVE-T-Coupling Piece Backflush: EPC 1 Heart CUT: EPC 2 Constant: EPC 3 MAY-02 3 | 8

  5. Valveless Column SwitchingBACKFLUSH & Heart Cut EPC 2 EPC 3 BACKFLUSH & HEART CUT LIVE-T-Coupling Piece Backflush: EPC 1 Heart Cut: EPC 2 Constant: EPC 3 Seal Transfer Capillary Pre Column Main Column Cut to Vent / Detector Purge to Vent / Detector MAY-02 4 | 8

  6. EPC 2 EPC 3 Pre Column Main Column Cut to Vent / Detector Purge to Vent / Detector EPC 1 EPC 3 EPC 2 Ambient Valveless Column SwitchingBACKFLUSH & HEART CUT CUT TO VENT: EPC 2 < EPC 3 MAY-02 5 | 8

  7. EPC 2 EPC 3 Pre Column Main Column Cut to Vent / Detector Purge to Vent / Detector EPC 1 EPC 2 EPC 3 Ambient Valveless Column SwitchingBACKFLUSH & HEART CUT PRE TO MAIN COLUMN EPC 2 > EPC 3 MAY-02 6 | 8

  8. EPC 2 EPC 3 Pre Column Main Column Cut to Vent / Detector Purge to Vent / Detector EPC 1 EPC 2 EPC 3 Ambient Valveless Column SwitchingBACKFLUSH & HEART CUT BACKFLUSH EPC 1 < EPC 2 MAY-02 7 | 8

  9. 6 3 2 1 4 EPC 1 EPC 2 EPC 3 5 Detector 3 5 1 2 Pre Column Main Column 1 4 6 Main Column 2 Needle Valve or Restrictor Needle Valve or Restrictor Detector Split & Backflush Vent Vent or Detector Valveless Column SwitchingBACKFLUSH & DISTRIBUTION BACKFLUSH & DISTRIBUTION LIVE-T-Coupling Piece Backflush: EPC 1 Distribution: EPC 2 Constant: EPC 3 MAY-02 8 | 8

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