BioLogic DuoFlow Valves

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Overview

3-Column Switching Scheme
BioLogic Duo-Flow Valving Guide: Application 1 (Basic One-Column)

Click through the Procedure steps on the left of the diagram to see an illustration of the buffer flowing through the system.

BioLogic Duo-Flow Valving Guide: Application 3 (Reverse Flow)

Click through the Procedure steps on the left of the diagram to see an illustration of the buffer flowing through the system.

BioLogic Duo-Flow Valving Guide: Application 5 (8-Column Switching)

Click through the Procedure steps on the left of the diagram to see an illustration of the buffer flowing through the system.

BioLogic Duo-Flow Valving Guide: Application 10 (Flow-Through Profiling)

Click through the Procedure steps on the left of the diagram to see an illustration of the buffer flowing through the system.

The high-pressure sample injection and stream-select valves, AVR7-3 and AVR9-8, use the patented make-before-break (MBB) design that prevents pressure spikes when the valve rotates from one port to another, which eliminates baseline interference. This feature is beneficial when using fragile low-pressure columns or flow-sensitive detectors, and prevents pump shutdowns due to transient overpressure conditions. Automated valves enhance system flexibility and convenience. Methods can include automated injection, buffer selection, column switching, and large-volume fraction collection.

BioLogic DuoFlow valves may be used alone or in combinations, depending on the application:

AVR7-3 Valve

  • Automation of single sample injections using single-injection loops (from 25 µl to 5 ml)
  • Reverse-flow chromatography for affinity purifications
  • Two-column switching
  • Sequential binding and elution

AVR9-8 Valve

  • Multiple buffer selection
  • Eight-column switching
  • Large-volume fraction collection
  • Tandem chromatography

SV5-4 Select Valve

  • Automation of large-sample loading
  • Buffer selection in chromatography protocols

SVT3-2 Diverter Valve

  • Buffer selection
  • Loading of large samples
  • Diverting buffer flow
AVR7-3 Valve Rebuild Kit

760-0401
Kit for rebuilding the AVR7-3 automated sample injection valve (#760-0406)

List Price:   $579.00
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AVR9-8 Valve Rebuild Kit

760-0403
Kit for rebuilding the AVR9-8 stream-select valve (#760-0408)

List Price:   $579.00
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SVT3-2 Valve Rebuild Kit

760-0411
Kit for rebuilding the SVT3-2 diverter valve (#760-0410)

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AVR9-8 Stream-Select Valve

760-0408
Pkg of 1, high-pressure valve, 9-port, 8-position, 3,500 psi (233 bar) limit, for use with BioLogic DuoFlow system

List Price:   $3,008.00
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SVT3-2 Diverter Valve

760-0410
Pkg of 1, solenoid valve, 3-port, 2-position, 30 psi (2 bar) limit, for use with BioLogic DuoFlow system

List Price:   $767.00
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SV5-4 Select Valve

750-0415
Pkg of 1, 5-port, 4-position solenoid valve, 30 psi (2 bar) limit

List Price:   $1,284.00
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AVR7-3 Automated Sample Injection Valve

760-0406
Pkg of 1, high-pressure sample inject valve, 9-port, 8-position, 3,500 psi (233 bar) limit, for use with BioLogic DuoFlow system

List Price:   $3,836.00
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Number Description Options
4106040 Instruction Manual, V9-8 Manual, and AV9-8 Automated Stream Select Valves, Rev C Click to download
2815 BioLogic DuoFlow Valve Brochure, Rev C Click to download
2584 BioLogic DuoFlow Valving Guide, Rev E Click to download
4106056 Instruction Manual, SV5-4 Select Valve, BioLogic™ HR, BioLogic Duo-Flow™, Rev D Click to download
4106052 Instruction Manual, SV3-2 Diverter Valve, Rev C Click to download