AIGIS AGS-HZG05W12T-ET-K75E2-E-Q3A 5-Position, 12-Channel Column Switching Valve for Protein Purification

Overview

The AIGIS AGS-HZG05W12T-ET-K75E2-E-Q3A is a precision-engineered, electrically actuated 5-position, 12-channel column switching valve designed specifically for automated protein purification workflows. Built upon a robust rotary valve architecture with chemically resistant fluidic pathways, it enables deterministic routing of sample, buffer, and eluent streams across multiple chromatographic columns—supporting both sequential and parallel purification strategies. The valve operates on the principle of discrete positional indexing, where each mechanical position corresponds to a defined fluidic path configuration between inlet, outlet, and up to five independent column ports (A1–A5 and B1–B5), allowing flexible implementation of multi-step gradient elution, column regeneration, trap-and-elute, or dual-column recycling protocols. Its design prioritizes low dead volume (<15 µL per port transition), high-pressure tolerance (up to 10 MPa / 100 bar), and repeatable switching accuracy (±0.1° angular positioning), ensuring minimal carryover and maximal method reproducibility in GMP-aligned bioprocessing environments.

Key Features

• 5 discrete rotational positions enabling programmable flow-path selection among 12 dedicated fluidic channels
• Electrically driven stepper motor actuation with integrated optical end-stop detection for position verification
• Chemically inert wetted materials: PEEK rotor, sapphire bearings, and FFKM (Kalrez®) seals compatible with denaturants (e.g., 8 M urea, 6 M guanidine HCl), organic modifiers (acetonitrile, isopropanol), and low-pH eluents (0.1% TFA)
• Low internal volume architecture optimized for minimal band broadening and reduced sample dilution
• Integrated TTL/RS-485 interface for synchronization with PLCs, chromatography data systems (CDS), or custom LabVIEW-based control platforms
• Modular mounting footprint compliant with ISO 2858/DIN 24960 standards for direct integration into benchtop or floor-standing protein purification systems

Sample Compatibility & Compliance

The valve supports aqueous and semi-aqueous mobile phases commonly used in ion exchange (IEX), size exclusion (SEC), hydrophobic interaction (HIC), and affinity chromatography—including His-tag, GST, and antibody capture resins. It maintains integrity under repeated exposure to cleaning-in-place (CIP) solutions (0.5–1.0 M NaOH, 20% ethanol). From a regulatory standpoint, its deterministic state mapping (12 defined operational states, each with traceable channel assignments) facilitates audit-ready method documentation. When deployed within validated purification platforms, the valve contributes to adherence with ICH Q5A(R2), USP <1058>, and FDA 21 CFR Part 11 requirements—particularly when paired with electronic logbook functionality and role-based access control in upstream software layers.

Software & Data Management

Valve operation is fully scriptable via ASCII command protocol over RS-485, supporting real-time position interrogation, state transition logging, and error-code reporting (e.g., timeout, stall, misalignment). Each of the 12 predefined states—including “IN-A1-B1-OUT”, “IN-B3-A3-OUT”, and “IN-OUT” bypass—is mapped to a unique numeric identifier (State 1–12), enabling seamless integration into method files in ChromNav, UNICORN, or open-source tools like OpenChrom. Firmware includes non-volatile memory for retaining last-known position during power loss, and all state transitions are timestamped with microsecond resolution for GLP-compliant audit trails. Optional firmware updates support enhanced diagnostics, including rotor wear estimation based on torque profile analysis.

Applications

• Automated multi-column protein A affinity purification with intermediate wash and regeneration cycles
• High-throughput screening of resin candidates using parallel column arrays
• Two-dimensional LC (2D-LC) coupling between desalting traps and analytical SEC columns
• Continuous chromatography configurations (e.g., periodic counter-current chromatography, PCC) requiring precise column sequencing
• Process development studies involving orthogonal purification trains (e.g., IEX → SEC → AEX)
• In-line buffer blending and pH adjustment via selective port routing prior to column entry

FAQ

What is the maximum operating pressure rating?
Rated for continuous operation up to 10 MPa (100 bar) at 25 °C with standard FFKM seals.
Can this valve be integrated with ÄKTA systems?
Yes—via RS-485 communication using custom driver scripts or third-party middleware; pinout and command syntax documentation is provided in the technical manual.
Is position feedback provided during operation?
Yes—optical encoders confirm final position within ±0.1°, and status registers report actual vs. commanded state in real time.
How is carryover minimized between runs?
Through ultra-low dead volume design (<15 µL), sapphire-bearing rotor stability, and configurable purge intervals programmed into the control sequence.
Does the valve support remote firmware updates?
Firmware updates require local connection via USB-to-RS485 adapter and AIGIS-provided utility software; no over-the-air capability is implemented for security compliance.