Switching Valves

Switching Valves

Compact, automated valve switching

Compact, automated valve switching

Switching Valves are compact, motorized standalone modules that are ready-to-use alternatives to manual selection valves. Each module has a unique flow switching pattern that is designed for a particular set of laboratory tasks. Choose from a variety of products to best suit your analytical needs.

Two Position Six-Port Switching Valve Switching Valves

Overview

  • Valve positions are displayed digitally
  • Positions may be selected locally from a front panel push-button or remotely by the built-in electronic interface
  • Compatible with laboratory instruments and computer systems

Recommended Use: For ready-to-use alternatives to manual valve selection.

Features Header

Features Header

Solvent Selector Valve

The Solvent Selector Valve is a motorized, standalone, ready-to-use alternative to manual solvent selection. It can be used for automated selection of various mobile-phase compositions for unattended methods development.

Features:

  • Supports up to six different solvents for isocratic and step gradient applications
  • Digital display of valve position
  • Positions selected remotely by built-in instrument compatible electronic interface or locally by push-button

Two-Position, Six-Port Switching Valve

The Two-Position, Six-Port Switching Valve is a motorized standalone unit ready to use in applications involving automated switching for sample enrichment, two-column selection, and sample clean-up.

Features:

  • Automates multiple injector and switching tasks
  • Digital display of valve position
  • Positions selected remotely by built-in instrument compatible electronic interface or locally by push-button

Two-Position, Ten-Port Selector Valve

The Two-Position, Ten-Port Selector Valve is a motorized standalone unit that is ready to use in applications involving automated switching for sample clean-up and alternating column regeneration.

Features:

  • Combines injection and sample enrichment
  • Digital display of valve position
  • Positions selected remotely by built-in instrument compatible electronic interface or locally by push-button

Three-Column Selector Valve

The Three-Column Selector Valve is a ready-to-use alternative to manual column selection. The selector valve supports up to three different columns for method development and preparative applications. The valve is available as either stainless-steel or PEEK.

Features:

  • Low profile, compact design that allows it to be installed in an external temperature-controlled column oven
  • Automates multiple injector and switching tasks
  • Digital display of valve position
  • Positions selected remotely by built-in instrument compatible electronic interface or locally by push-button

Six-Column Selector Valve

The Six-Column Selector Valve is a ready-to-use alternative to manual column selection. The selector valve supports up to six different columns for method development and preparative applications. The valve is available as either stainless-steel or PEEK.

Features:

  • Color-coded ports and tubing to identify tubing lines and visually distinguish different components of the same system
  • Low profile, compact design that allows it to be installed in an external temperature-controlled column oven
  • Automates multiple injector and switching tasks
  • Digital display of valve position
  • Positions selected remotely by built-in instrument compatible electronic interface or locally by push-button

Ten-Position Selector Valve

The Ten-Position Selector Valve is a motorized standalone unit that is ready to use in applications involving automated switching among streams.

Features:

  • Automates selection among up to ten columns to accelerate methods development and increase column lifetime
  • Digital display of valve position
  • Positions selected remotely by built-in instrument compatible electronic interface or locally by push-button

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Switching valves designed for LC (liquid chromatography) columns are integral elements within chromatographic systems crafted to amplify adaptability and functionality. These valves assume a pivotal role in guiding liquid flow throughout the chromatography setup, enabling smooth transitions between diverse columns or analytical pathways.

The key attributes and functionalities of switching valves tailored for LC columns encompass:

Column Switching Capability: The primary function of these valves is to facilitate effortless and swift transitions between multiple LC columns. This capability proves particularly beneficial in applications where distinct separation conditions or analytical methods are necessary for diverse samples.

Sample Diverter Functionality: Certain switching valves are equipped with sample diverter features, empowering users to redirect sample flow to waste or other destinations during specific phases of the chromatographic run. This proves advantageous in preventing sample contamination and upholding system cleanliness.

Injection Port Switching: In addition to column switching, these valves may be designed to switch between different injection ports. This proves advantageous when handling varied sample matrices or when diverse injection techniques are required for specific analyses.

Automation and Integration: Modern LC systems frequently integrate automation, and switching valves seamlessly integrate into automated workflows. This enhances efficiency by minimizing manual intervention and bolstering the overall throughput of the chromatographic system.

Compatibility and Material Selection: Switching valves are meticulously designed to be compatible with various LC column types and materials. Constructed from materials resistant to corrosion and designed to maintain inertness, they ensure minimal impact on sample integrity.

High Pressure Tolerance: Recognizing the elevated pressures associated with liquid chromatography, these valves are meticulously engineered to withstand the rigorous conditions of the chromatographic system, ensuring reliable and robust performance.

Versatility for Various Applications: Whether deployed in pharmaceutical research, environmental analysis, or other scientific disciplines, switching valves tailored for LC columns exhibit versatility, accommodating diverse analytical requirements.

Switching valves tailored for LC columns stand as indispensable components, contributing to the adaptability, efficiency, and overall performance of liquid chromatography systems. Their capacity for seamless transitions between columns and injection ports, coupled with automation features, renders them indispensable tools for analytical laboratories engaged in a broad spectrum of chromatographic applications.

Switching Valves FAQs

1. What are the types of switching valves available for LC applications?
Switching valves for liquid chromatography (LC) come in a variety of types to suit different applications. Common options include two-position six-port valves, ten-position selector valves, and multiport valves. Two-position six-port valves are typically used for column switching or sample injection. Ten-position selector valves are ideal for solvent selection or method development, allowing multiple mobile phases to be connected to the system. Multiport valves provide additional flexibility for complex workflows such as alternating column regeneration. Both manual and motorized versions are available, with motorized valves enabling automation and remote control for high-throughput laboratories.

2. Do switching valves help with extending the lifespan of LC columns?
Switching valves play a crucial role in protecting and extending the lifespan of LC columns by facilitating efficient workflow management. They allow for column switching during regeneration or maintenance without interrupting the chromatographic process. By isolating columns from potentially damaging conditions, such as high pressures or incompatible solvents, switching valves help reduce wear and tear. Additionally, these valves enable sample clean-up processes or solvent changes to occur outside of the analytical column, minimizing exposure to contaminants and ensuring consistent performance over time.

3. What safety features are incorporated into switching valves to prevent system contamination?
Switching valves are designed with safety features to minimize contamination risks and ensure system integrity. These features include chemically inert materials like PEEK or stainless steel, which resist solvent degradation and sample interaction. Some valves have sealed connections or low-dead-volume designs to prevent sample carryover. Advanced models may include built-in flushing ports to clean the valve interior between runs. Automated or motorized valves often come with position sensors to ensure accurate alignment, reducing the risk of leaks or cross-contamination during operation. Following maintenance and calibration protocols enhances these safety measures.