VICI Valco High-Performance 6-Port HPLC Switching Valve
| Brand | VICI |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model Series | VICI Valco Full Line |
| Pricing | Available Upon Request |
Overview
The VICI Valco High-Performance 6-Port HPLC Switching Valve is a precision-engineered fluidic control component designed for rigorous analytical applications in liquid chromatography (LC), ultra-high-performance liquid chromatography (UHPLC), and multidimensional separation systems. Based on the classic rotary valve architecture, it operates via a sealed, low-dead-volume rotor/stator interface that enables reproducible, leak-free flow path reconfiguration under high pressure (up to 10,000 psi / 690 bar, depending on configuration). Its fundamental principle relies on precise angular positioning of the rotor relative to fixed stator ports—enabling discrete, repeatable switching between sample loading, injection, column bypass, and column regeneration modes. Developed by VICI Valco since its founding in Houston in 1968, this valve series adheres to stringent design standards for chromatographic integrity, including minimal carryover (<0.01%), sub-microliter internal volume, and pressure-independent sealing performance.
Key Features
- Rotary actuation mechanism with hardened stainless-steel rotor and sapphire or ceramic stator surfaces for extended service life and chemical resistance
- Modular design supporting manual, pneumatic, or electric actuation options—including TTL/RS-232–compatible stepper motor controllers for automated integration
- Low dispersion geometry: total internal volume as low as 0.5 µL (standard 316 SS configuration); optional micro-bore configurations down to 0.1 µL
- Pressure-rated for continuous operation up to 10,000 psi (690 bar) with compatible wetted materials; validated for gradient compatibility and pulse-free flow switching
- Interchangeable port configurations (e.g., loop fill/inject, column backflush, heart-cutting, parallel column selection) without hardware modification
- Traceable manufacturing: each valve undergoes helium leak testing, pressure cycling validation, and functional verification per ISO 9001–certified protocols
Sample Compatibility & Compliance
The valve accommodates a broad range of mobile phases—including aqueous buffers, organic solvents (acetonitrile, methanol), corrosive acids/bases (0.1% TFA, 1M NaOH), and viscous modifiers—when constructed with appropriate wetted materials. Standard construction uses electropolished 316 stainless steel; alternative materials include Hastelloy C-276 (for chloride-rich environments), titanium (for high-pH or biomedical applications), electroformed nickel (for ultra-low metal leaching), and PEEK or PTFE-lined variants (for aggressive solvents or biocompatibility requirements). All valves comply with ASTM F2234 (Standard Practice for Qualification of Liquid Chromatography Valves) and support GLP/GMP workflows through documented calibration records and material traceability. When integrated into regulated systems, they meet FDA 21 CFR Part 11 requirements for electronic audit trails when paired with compliant controller firmware.
Software & Data Management
While the valve itself is a passive mechanical component, its actuation is fully programmable via industry-standard interfaces. Compatible software environments include VICI’s ValcoSoft suite (Windows-based, with sequence scripting, event logging, and remote diagnostics), as well as third-party LC platform integrations (Agilent OpenLab, Waters Empower, Thermo Chromeleon) through generic I/O or Modbus TCP protocols. All actuation events—including position transitions, dwell times, and error states—are timestamped and exportable in CSV or XML format. Audit trail functionality includes user ID, timestamp, command source, and physical confirmation feedback (via optional proximity sensors), satisfying ALCOA+ data integrity principles for regulated laboratories.
Applications
- Automated sample introduction in HPLC/UHPLC systems using external loop configurations (1–1000 µL loops)
- Column switching for comprehensive two-dimensional LC (LC×LC), including trap-elute, heart-cutting, and column backflushing
- Online solid-phase extraction (SPE-LC) coupling with programmable load-wash-elute cycles
- Method development support: rapid solvent or column screening via multi-port selection without manual tubing reconfiguration
- Process analytical technology (PAT) implementations requiring real-time flow routing in bioprocessing or pharmaceutical QC workflows
- Gas chromatography (GC) auxiliary functions such as carrier gas modulation or valve-based cryo-trapping (with appropriate temperature-rated variants)
FAQ
What is the maximum operating pressure for standard VICI 6-port valves?
Standard 316 SS valves are rated to 6,000 psi (414 bar) at 25°C; high-pressure variants with reinforced rotor seals support up to 10,000 psi (690 bar) with compatible materials.
Can this valve be used with aggressive solvents like HFIP or concentrated TFA?
Yes—provided Hastelloy C-276 or titanium wetted components are selected; material compatibility charts are available per solvent concentration and temperature.
Is valve position feedback available for closed-loop control?
Optional Hall-effect or optical position sensors provide real-time rotor angle verification and can be integrated into PLC or LC controller logic.
How is carryover minimized during high-sensitivity analysis?
Through optimized flow path geometry, electropolished surfaces, and recommended wash protocols (e.g., 5× loop volume flush with strong solvent between injections).
Does VICI provide IQ/OQ documentation for GMP installations?
Yes—custom qualification packages including installation qualification (IQ), operational qualification (OQ), and test protocols aligned with USP and ASTM E2500 are available upon request.
