ChemTron DAB-2 Pressure Digestion Vessel

Overview

The ChemTron DAB-2 Pressure Digestion Vessel is a precision-engineered, TÜV-certified laboratory-scale reaction vessel designed for controlled hydrothermal synthesis, sample digestion, and high-pressure catalytic reactions under subcritical and near-critical aqueous conditions. Based on the principles of sealed-vessel hydrothermal chemistry, the DAB-2 enables reproducible reaction environments where elevated temperature and pressure synergistically enhance molecular reactivity—particularly in water-mediated transformations such as oxidative digestion, mineral dissolution, nanoparticle crystallization, and green solvothermal synthesis. Its operational envelope (up to 230 °C and 200 bar) bridges the gap between conventional reflux systems and full supercritical reactors, offering enhanced kinetics and selectivity without requiring specialized infrastructure. The vessel’s compact 50 mL internal volume supports small-batch experimentation while maintaining high surface-to-volume ratio for rapid thermal equilibration and precise process control.

Key Features

• Robust pressure containment architecture: Outer vessel fabricated from high-corrosion-resistant SS 316Ti (DIN 1.4571), optimized for long-term exposure to acidic, alkaline, and halide-rich media at elevated temperatures.
• Modular insert system: Interchangeable TFM-PTFE liners (25 mL or 50 mL options) provide inert, low-outgassing sample contact surfaces; stainless steel inserts (SS 50 mL) are available for high-temperature extractions or alcoholysis applications.
• Fail-safe pressure management: Factory-calibrated Monel rupture disc (200 bar nominal burst pressure), integrated with PFA protective foil and full traceability certificate—compliant with PED 2014/68/EU Annex I requirements for Category II pressure equipment.
• Repeatable sealing performance: Bayonet-style quick-lock closure ensures uniform torque distribution and leak-tight integrity across repeated thermal cycles; validated via helium leak testing and hydrostatic proof pressure (1.5 × MAWP).
• Full TÜV certification: Each DAB-2 vessel undergoes individual pressure testing and receives a documented test certificate confirming compliance with EN 13445-3 (Unfired Pressure Vessels) and German AD 2000-Merkblatt W2.

Sample Compatibility & Compliance

The DAB-2 is routinely deployed in accredited laboratories for EPA Method 3052–compliant microwave-assisted acid digestion, ISO 17294-2 elemental analysis prep, and ASTM D5291–based fuel ash quantification. Its chemically inert TFM-PTFE liner resists attack from HF, HNO₃/HCl mixtures, and peroxide-based digestants—making it suitable for geological, environmental, and pharmaceutical sample matrices. All metallic components meet RoHS 2011/65/EU and REACH SVHC criteria. The rupture disc assembly carries CE marking under the Pressure Equipment Directive, and documentation supports GLP audit trails including batch-specific calibration records and material test reports (MTRs) per EN 10204 3.1.

Software & Data Management

When integrated with the optional Auto Reactor 1.6 control system (Order No. 2152.001), the DAB-2 supports time-stamped, multi-channel data logging—including real-time pressure, temperature, and stirring speed—with configurable alarm thresholds and automatic shutdown triggers. The software generates PDF reports compliant with FDA 21 CFR Part 11 requirements, featuring electronic signatures, audit logs, and immutable data archiving. All raw measurement files (.csv/.txt) retain embedded metadata (vessel ID, operator, ambient lab conditions) for full traceability in ISO/IEC 17025-accredited workflows.

Applications

• Hydrothermal synthesis of metal oxides (e.g., TiO₂, ZnO), MOFs, and perovskite nanocrystals
• Routine digestion of biological tissues, soils, sludges, and polymers prior to ICP-OES/MS analysis
• Catalytic hydrogenation, transesterification, and hydrolysis under pressurized aqueous or mixed-solvent conditions
• Stability testing of active pharmaceutical ingredients (APIs) under accelerated aging protocols (ICH Q1A)
• Low-volume solvent extraction of cannabinoids, polyphenols, or heavy metals from plant matrices

FAQ

What is the maximum allowable working pressure and temperature for the DAB-2 vessel?

The DAB-2 is rated for continuous operation up to 200 bar and 230 °C. Short-term excursions beyond these limits are not permitted—even during ramp-up phases—as they compromise fatigue life and void TÜV certification.
Can the DAB-2 be used with aggressive fluorinated acids such as HF?

Yes—when equipped with the standard TFM-PTFE insert (Order No. 5215500), the vessel is compatible with ≤40% HF solutions at ≤200 °C. For extended exposure or higher concentrations, consult ChemTron’s chemical resistance matrix and consider the optional SS 50 mL insert with TFM cap.
Is the rupture disc replaceable, and how often should it be changed?

Each rupture disc is single-use and must be replaced after every pressure event—even if no visible deformation occurs. Discs are supplied with batch-specific certificates of conformity and should be installed using the dedicated mounting tool (Order No. 5218060) to ensure correct torque application.
Does the DAB-2 meet requirements for GLP-compliant laboratories?

Yes—the vessel’s TÜV certification, traceable rupture disc documentation, and compatibility with Auto Reactor 1.6’s 21 CFR Part 11–enabled data acquisition fulfill core GLP elements related to equipment qualification, calibration, and raw data integrity.
What heating modules are compatible with the DAB-2?

ChemTron offers dedicated aluminum heating blocks in 4-, 6-, and 12-position configurations, each with independent PID-controlled zones and integrated Pt100 sensor feedback. Blocks are rated for continuous use up to 250 °C and feature recessed cavities for precise vessel alignment and thermal uniformity ±1.5 K across all positions.