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Valveless “LIVE” Column Switching - PowerPoint PPT Presentation


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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 column switching backflush

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

valveless column switching backflush1

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

valveless column switching backflush heart cut

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

valveless column switching backflush heart cut1
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

valveless column switching backflush heart cut2

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

valveless column switching backflush heart cut3

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

valveless column switching backflush heart cut4

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

valveless column switching backflush distribution

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