IDEX Valves

Idex Manual Valves

IDEX Manual Injection, Switching & Selection Valves

IDEX manual valves provide precise, reliable fluid path control for chromatography, diagnostic, and sequencing applications. Designed for durability and repeatable performance, these valves support essential workflows including sample injection, column switching, back flushing, sample enrichment, and reagent selection—without the need to disconnect tubing or reconfigure plumbing.

Manual 2-Position Switching Valves allow users to alternate between two fluid paths for streamlined column switching, back flushing, or sample routing. Manual 3-Way Switching Valves offer added flexibility by directing flow between multiple pathways, making them ideal for more complex chromatographic or analytical setups.

IDEX manual sample injectors feature Make-Before-Break (MBB) architecture, maintaining continuous flow between LOAD and INJECT positions to minimize transient pressure spikes and protect sensitive LC systems. Available in biocompatible PEEK, stainless steel, and other chemically resistant materials, these injectors deliver dependable performance across a wide range of solvent conditions.

Manual 6-Position Selector Valves enable discrete selection among multiple liquids through a common central port, supporting applications such as mobile phase selection, fraction collection, reagent switching, and sample stream management.

Chrom Tech offers a broad selection of IDEX manual injection, switching, and selector valves compatible with leading LC platforms. With many common configurations in stock and ready to ship, we make it easy to build reliable fluidic pathways and maintain consistent analytical performance.

SKU DESCRIPTION FITS TUBING OD PORTS POSITIONS FITTING MAX PSI MATERIAL
 
V-101DBulkhead Flow Valve1/16"  1/4-28500PEEK, PTFE
V-101LBulkhead Flow Valve1/16"  1/4-28500PEEK, PTFE
V-101TBulkhead Flow Valve1/16"  1/4-28500PEEK, PTFE
9725Injection Valve1/16"6210-325000PEEK
3725IInjection Valve1/8"625/16-243000PEEK
3725I-038Injection Valve1/8"625/16-244000SST, PEEK
7725IInjection Valve1/16"6210-325000Stainless Steel
7725I-188Injection Valve1/16"6210-328700Stainless Steel
9725IInjection Valve1/16"6210-325000PEEK
7060Selection Valve1/16"7610-325000Stainless Steel
MXT715-105Selection Valve1/16"7610-3215000UltraLife
MXX777-605Selection Valve1/8" or 1/16"76 125RPC-7
MXX778-605Selection Valve1/8" or 1/16"1110 125RPC-7
7000Switching Valve1/16"6210-325000Stainless Steel
7030Switching Valve1/16"6210-325000Stainless Steel
7000LSwitching Valve1/16"6210-325000Stainless Steel
7030LSwitching Valve1/16"6210-325000Stainless Steel
MXP7900-000Switching Valve1/16"6210-326000DuraLife
MXP9900-000Switching Valve1/16"6210-325000PEEK
MXT715-000Switching Valve1/16"6210-3215000UltraLife
MXT715-102Switching Valve1/16"10210-3215000UltraLife
Tech Tip

A Dual Mode Injection Valve allows either partial or complete filling of the sample loop and introduces sample by syringe through the needle port built directly into the valve shaft. Complete filling of the loop provides greater injection-to-injection repeatability.

Key Definitions â–¸
Manual Injection Valve
A hand-actuated valve used to introduce a sample into a liquid chromatography flow path by switching between LOAD and INJECT positions, typically using a fixed sample loop.
Two-Position Switching Valve
A valve with two discrete positions that alternates between two fluid pathways, commonly used for column switching, backflushing, diverting flow, or routing samples without disconnecting tubing.
Three-Way Switching Valve
A manual valve that directs flow between multiple pathways using a three-way configuration, providing added flexibility for routing mobile phase, reagents, or sample streams in analytical systems.
Six-Position Selector Valve
A valve that connects a common central port to one of multiple peripheral ports, enabling selection among several liquids or flow paths for tasks such as mobile phase selection, fraction collection, or reagent switching.
Make-Before-Break (MBB)
A valve switching architecture that maintains continuous flow during rotation by establishing the new flow path before fully disengaging the previous one, helping reduce transient pressure shocks and flow interruption.
Frequently Asked Questions â–¸
What are IDEX manual valves used for?
IDEX manual injection, switching, and selector valves are used to control fluid paths in chromatography, diagnostic, and sequencing systems. Common applications include sample injection, column switching, backflushing, reagent selection, and sample enrichment.
What is the benefit of Make-Before-Break (MBB) design?
MBB architecture maintains continuous flow while switching between positions, helping minimize transient pressure spikes and protecting sensitive LC components during manual sample injection.
Which materials are available for IDEX manual valves?
Depending on model, IDEX valves are available in PEEK, stainless steel, PTFE, and specialty materials such as UltraLife and DuraLife, providing chemical compatibility for a wide range of solvents and operating pressures.
Are these valves compatible with Agilent and other LC systems?
Yes. IDEX manual valves are commonly used with Agilent, Thermo Fisher Scientific, Waters, and Shimadzu LC platforms, supporting both analytical and preparative chromatography workflows.
How do I choose the right manual valve for my application?
Selection depends on tubing OD, number of ports and positions, pressure requirements, and chemical compatibility. Chrom Tech specialists can help identify the best valve configuration for your specific analytical or fluid-handling workflow.