Omnifit EZ Series Medium-Pressure Glass Chromatography Columns (Model 006EZ-10-25-FF) by Sanotac — UK-Manufactured Protein Purification Columns for AKTA, NGC & Biolot Systems

Overview

The Omnifit EZ Series Medium-Pressure Glass Chromatography Columns are precision-engineered, modular chromatographic hardware components designed for reproducible protein purification, preparative liquid chromatography, and continuous-flow bioprocessing applications. Manufactured in the UK by Omnifit (a brand of Porvair Sciences), these columns operate on classical axial compression principles—enabling uniform bed packing and minimizing channeling under medium-pressure conditions (up to 40 bar for 10 mm ID). The column architecture integrates borosilicate glass tubing with chemically inert end fittings, PTFE or PE frits, and high-performance elastomeric seals, ensuring mechanical stability and long-term integrity during repeated cycles of packing, equilibration, elution, and regeneration. Unlike disposable plastic columns, Omnifit EZ units are fully reusable, autoclavable (excluding O-rings), and compatible with both gravity-fed and pump-driven systems—including GE Cytiva AKTA platforms, Bio-Rad NGC systems, and Sanotac Biolot protein purifiers. Their design conforms to fundamental requirements of Good Laboratory Practice (GLP) and supports audit-ready workflows in regulated environments when integrated with compliant data acquisition software.

Key Features

• Modular, user-assembled construction with standardized 1/4″-28 UNF thread interfaces for rapid integration into existing chromatography manifolds.
• Three configurable compression modes: fixed-fixed (FF), adjustable-fixed (AF), and dual-adjustable (AA), allowing precise control over bed density and column backpressure.
• Borosilicate glass column body offers optical clarity for real-time visual inspection of bed homogeneity and resin settling behavior.
• Chemically resistant wetted materials: borosilicate glass, PTFE/PE frits, FKM/FPM O-rings, acetal compression nuts, and glass-filled polypropylene connectors—validated for compatibility with aqueous buffers, chaotropic agents (e.g., urea, guanidine HCl), and common organic modifiers used in ion exchange and hydrophobic interaction chromatography.
• Thermal stability across 4–40 °C supports cold-room purification of thermolabile proteins and ambient-temperature process development.
• Comprehensive size matrix: seven internal diameters (5–50 mm) and lengths from 50–500 mm, enabling scalable method transfer from analytical to pilot-scale purification.

Sample Compatibility & Compliance

Omnifit EZ columns are validated for use with a broad spectrum of biomolecules—including monoclonal antibodies, recombinant enzymes, plasma-derived therapeutics, synthetic peptides, and natural product isolates (e.g., alkaloids, flavonoids, terpenoids). Their pH tolerance (1–14) accommodates low-pH viral inactivation steps and high-pH cleaning-in-place (CIP) protocols. While not rated for ultra-high-pressure applications (>100 bar), they meet ASTM D3924-17 specifications for dimensional stability under sustained pressure and ISO 8536-4:2017 requirements for glass container integrity in pharmaceutical processing equipment. Columns are supplied with full material traceability documentation and comply with REACH and RoHS directives. Note: For FDA-regulated biomanufacturing, validation of column performance—including hold-time studies, extractables profiling, and leachables assessment—is the responsibility of the end user per ICH Q5A(R2) and USP .

Software & Data Management

Omnifit EZ columns do not include embedded electronics or firmware; they function as passive, hardware-level components within instrument-controlled chromatography systems. When deployed with Cytiva UNICORN, Bio-Rad Biologics, or Sanotac Control Suite software, column parameters (ID, length, resin type, flow rate limits) are manually entered into method templates to ensure accurate residence time calculation, gradient delay volume compensation, and pressure alarm thresholds. All system logs—including pressure traces, UV absorbance profiles, and fraction collector triggers—are timestamped and stored in accordance with 21 CFR Part 11 requirements when using validated software configurations with electronic signatures and audit trails enabled.

Applications

• Preparative purification of His-tagged and GST-fusion proteins using immobilized metal affinity chromatography (IMAC) or glutathione resin.
• Desalting and buffer exchange of antibody fragments via size-exclusion chromatography (SEC) at ≤2 mL/min flow rates.
• Ion exchange purification of plasmid DNA and mRNA intermediates under non-denaturing conditions.
• Small-molecule isolation from botanical extracts using reversed-phase or normal-phase silica-packed columns.
• Process development and tech-transfer studies requiring identical column geometry across lab, pilot, and GMP manufacturing scales.
• Teaching laboratories for hands-on instruction in column packing techniques, breakthrough curve analysis, and mass balance verification.

FAQ

Can Omnifit EZ columns be sterilized using autoclaving?

Yes—the borosilicate glass body and acetal/PP fittings withstand standard autoclave cycles (121 °C, 15–20 min); however, FKM O-rings must be replaced post-autoclaving due to thermal degradation.

What is the maximum recommended flow rate for a 10 mm ID × 250 mm column?

At 40 bar maximum pressure and assuming typical agarose-based resins (e.g., Sepharose CL-4B), linear velocity should not exceed 150 cm/h, corresponding to ~3.5 mL/min for water-equivalent viscosity.

Are replacement frits and O-rings available separately?

Yes—Sanotac supplies OEM-certified spare parts kits (Cat. No. EZ-SK-10-FF) containing PE frits, FKM O-rings, acetal nuts, and PTFE tubing assemblies.

Do these columns support dynamic axial compression (DAC)?

No—Omnifit EZ columns utilize static axial compression only; for true DAC functionality, consider Porvair’s proprietary OmniDAC series or third-party hydraulic compression modules.

Is there a difference between “SolventPlus” and standard EZ columns?

Yes—SolventPlus variants feature ETFE end caps and Chemraz® O-rings for enhanced resistance to aggressive organics (e.g., DMSO, chloroform); standard EZ columns use FKM and acetal, optimized for aqueous protein work.