ChemTron NR-20L Medium-Pressure Laboratory Reactor

Overview

The ChemTron NR-20L is a medium-pressure, jacketed laboratory reactor engineered for reproducible, scalable chemical synthesis and process development under controlled thermal and pressure conditions. Designed in accordance with DIN 28139 and ASME BPVC Section VIII Div. 1 (for optional certified variants), the NR-20L employs a robust stainless steel (AISI 316) vessel architecture with a fixed-clamp closure system—eliminating threaded or flanged joints that compromise long-term sealing integrity. Its core operational principle relies on magnetically coupled stirring, where the RV-400 high-torque magnetic drive isolates the reaction environment from mechanical shaft penetration, ensuring zero dynamic leakage points and enabling operation up to 20 bar at temperatures up to 250 °C (dependent on elastomer selection). The integrated double-walled jacket supports precise temperature control via external circulators (e.g., JULABO units) or electric heating mantles, while the standardized port configuration facilitates modular integration of sensors, feed lines, gas inlets, and sampling systems—making it suitable for kinetic studies, catalytic screening, hydrogenation, polymerization, and crystallization workflows.

Key Features

• 20 L working volume with internal dimensions optimized for uniform mixing and heat transfer (ID: 309 mm, height: 425 mm)
• Fixed-clamp lid-to-body sealing system with dual O-ring grooves for redundant containment; compatible with FKM (Viton®), PTFE, and FFKM (Kalrez®) elastomers for broad chemical resistance
• RV-400 magnetic coupling rated for continuous operation at 20 bar and ≥250 °C, delivering >95% torque transmission efficiency with no lubrication required
• Standardized 7-port lid configuration: 1× central bore for magnetic drive shaft, 1× 12 mm thermowell, 1× certified rupture disc (ASME-compliant), 1× manual vent valve, 2× 6 mm NPT ports for jacket circulation, and 3× 8 mm NPT auxiliary ports
• Integrated bottom discharge valve (ball or diaphragm type) with full-bore flow path and optional PTFE-lined seat for particulate tolerance
• Jacket volume of ≈5.3 L, rated to 3 bar, enabling rapid thermal response with external fluid circulation
• Optional accessories include gas mass flow controllers, pH/ORP probes, inline FTIR cells, and automated dosing modules—all mountable via standardized NPT or VCR interfaces

Sample Compatibility & Compliance

The NR-20L is compatible with a wide range of organic solvents, aqueous solutions, corrosive reagents (e.g., HCl, H₂SO₄ below 150 °C), and heterogeneous slurries. All wetted parts—including vessel body, lid, stirrer shaft, and valves—are constructed from AISI 316 stainless steel as standard; Hastelloy C-276 variants are available for severe chloride or HF environments. The reactor meets CE marking requirements under the EU Pressure Equipment Directive (PED 2014/68/EU) for Group 2 fluids. When configured with traceable calibration certificates and audit-ready documentation, the system supports GLP and GMP-aligned workflows per ICH Q7 and FDA 21 CFR Part 11 when paired with compliant data acquisition software. Optional third-party pressure vessel certification (TÜV or Lloyd’s Register) is available upon request.

Software & Data Management

While the base NR-20L operates with analog instrumentation (mechanical pressure gauge, bimetallic thermometer), it is fully compatible with digital process monitoring systems. The pressure transducer output (0–20 bar, 4–20 mA or 0–10 V) and Pt100 temperature sensor signal can be interfaced with LabVIEW, DeltaV, or Siemens Desigo CCMS platforms. Optional ChemTron ControlSuite™ provides real-time logging, alarm management, recipe-based parameter sequencing, and electronic signature support compliant with 21 CFR Part 11 Annex 11 requirements. All data files are stored in CSV or HDF5 format with embedded metadata (timestamp, operator ID, batch ID, calibration status), enabling traceability across analytical method transfers and regulatory submissions.

Applications

• Batch-wise catalyst testing under elevated H₂ or CO partial pressures (e.g., Fischer–Tropsch screening)
• Exothermic nitration and sulfonation reactions requiring precise jacket temperature ramping and hold profiles
• Solvent-mediated polymorph screening with in situ Raman or FBRM probe integration
• Continuous-feed semi-batch hydrolysis or esterification with gravimetric dosing control
• High-solid-content slurry reactions (e.g., battery cathode precursor synthesis) using bottom valve discharge and high-viscosity impellers
• Reaction calorimetry via jacket energy balance (q = m·c_p·ΔT) when paired with calibrated circulator flow and ΔT measurement

FAQ

What pressure and temperature ratings apply to the standard NR-20L configuration?

The standard unit is rated for continuous operation at 20 bar and 200 °C with FKM seals; upgrading to FFKM (Kalrez®) seals extends the temperature limit to 250 °C.
Can the reactor be integrated into an automated synthesis platform?

Yes—the 4–20 mA pressure output, Pt100 RTD interface, and dry-contact relay outputs for agitation start/stop enable seamless integration with PLC-controlled lab automation frameworks.
Is the jacket designed for both heating and cooling?

Yes—the jacket supports bidirectional thermal fluid circulation; maximum recommended ΔT between jacket and process is 120 K to prevent thermal stress cracking.
What validation documentation is provided with the system?

Each unit ships with material test reports (MTRs) for vessel steel, pressure test certificate (hydrostatic at 1.5× MAWP), and O-ring compatibility charts per ASTM D1418 and ISO 1817.
Are spare parts and service support available outside Germany?

ChemTron maintains authorized service partners in the US, UK, Singapore, and Japan; critical spares (O-rings, rupture discs, magnetic couplings) are stocked regionally with <72-hour dispatch.