JULABO FLW11006 Circulating Chiller

Overview

The JULABO FLW11006 is an industrial-grade, water-cooled circulating chiller engineered for high-stability thermal management in demanding laboratory and pilot-scale process applications. Based on vapor-compression refrigeration with a single-stage hermetic scroll compressor and R404A refrigerant, the system delivers precise temperature control across a wide operating range of –20 to +40 °C. Its design prioritizes continuous-duty reliability, low maintenance, and compatibility with heat-sensitive instrumentation—including spectrometers, laser systems, NMR preamplifiers, rotary evaporators, and vacuum pumps—where consistent coolant supply and thermal inertia are critical. Unlike tap-water cooling, the FLW11006 recirculates conditioned fluid, eliminating water waste, reducing facility infrastructure load, and enabling operation in locations with limited or regulated water access. The unit complies with EU Ecodesign Directive 2019/2021 for energy-related products and meets IEC 61000-6-3 (EMC emission) and IEC 61000-6-2 (EMC immunity) standards.

Key Features

• High-capacity refrigeration system delivering up to 11.5 kW at 20 °C ambient and 2.7 kW at –20 °C, supporting high-heat-load equipment without thermal drift.
• Integrated variable-pressure circulation pump (0.5–6.0 bar) with flow rate of 60 L/min, compatible with long-loop or high-backpressure applications such as jacketed reactors or multi-instrument manifolds.
• Large reservoir volume (39–47 L) ensures thermal mass stability and minimizes frequent top-up cycles; reservoir level is continuously monitored via integrated float sensor with LED indication.
• Top-fill port enables rapid, spill-free fluid replenishment without disassembly; all fluid-contact components are corrosion-resistant stainless steel or EPDM-lined.
• Robust mechanical architecture: heavy-duty frame, vibration-damped compressor mounting, and acoustic insulation reduce operational noise to ≤74 dBA at 1 m distance.
• Flexible fluid compatibility—certified for use with deionized water, 30–50% ethylene glycol/water blends, and JULABO’s proprietary Thermal G series heat-transfer fluids—ensuring freeze protection down to –35 °C and extended service life.
• Maximum return fluid temperature tolerance of ≤80 °C prevents thermal shock to the evaporator and supports integration with exothermic processes requiring hot-inlet compensation.

Sample Compatibility & Compliance

The FLW11006 is designed for closed-loop circulation of non-aggressive, low-viscosity heat-transfer media only. It is not intended for direct contact with solvents, acids, alkalis, or particulate-laden fluids. All wetted materials—including pump head, reservoir liner, and heat exchanger—meet DIN 50930-6 corrosion resistance requirements for aqueous glycol solutions. The unit conforms to CE marking directives (2014/30/EU EMC, 2014/35/EU LVD, 2009/125/EC Ecodesign), and its refrigerant charge complies with F-Gas Regulation (EU) No. 517/2014 reporting thresholds. For GLP/GMP environments, optional RS232 or Profibus interfaces support audit-trail-capable data logging when paired with validated SCADA or LIMS platforms.

Software & Data Management

While the FLW11006 operates via a dedicated front-panel LED interface with 0.1 °C resolution and real-time display of setpoint, actual temperature, pump pressure, and reservoir level, digital integration is enabled through factory-installed serial communication options. RS232 allows bidirectional ASCII command protocol (e.g., “TEMP?”, “SET 25.0”) for remote setpoint adjustment and status polling—compatible with LabVIEW™, Python pySerial, and MATLAB® automation frameworks. Optional Profibus-DP integration supports deterministic cyclic data exchange in PLC-controlled facilities. All firmware versions adhere to IEC 62443-3-3 cybersecurity baseline requirements for industrial controllers, including password-protected parameter write access and non-volatile event logging.

Applications

• Stabilization of high-power lasers (CO₂, fiber, diode) requiring sub-±0.5 °C coolant temperature consistency over extended duty cycles.
• Cooling of analytical instruments—including ICP-MS torch interfaces, HPLC column ovens, and mass spectrometer ion sources—where thermal noise directly impacts signal-to-noise ratio and calibration stability.
• Temperature control of jacketed glass reactors (10–100 L) during exothermic synthesis, leveraging the unit’s 80 °C max return temperature tolerance and adjustable pump pressure.
• Support of semiconductor metrology tools (e.g., ellipsometers, AFM stages) where vibration isolation and low-temperature ripple are prerequisites for nanoscale measurement fidelity.
• Centralized cooling distribution in multi-station labs using manifolded supply/return lines, enabled by the unit’s high-flow, high-head pump and large thermal buffer volume.

FAQ

What is the maximum allowable inlet temperature for the FLW11006’s return line?
The unit accepts return fluid up to 80 °C—enabling safe integration with moderate-temperature process loops without external heat exchangers.
Can the FLW11006 operate unattended for 24/7 continuous duty?
Yes. It is rated for continuous operation under ambient conditions of 5–40 °C and includes dual-level safety cutoffs: high-temperature shutdown (>90 °C return) and low-level reservoir alarm with automatic pump disable.
Is R404A refrigerant compliant with current environmental regulations?
R404A remains permissible for servicing existing equipment under EU F-Gas Regulation Annex I, though its high GWP (3922) mandates certified technician handling and leak-checking per EN 378-1. JULABO provides full refrigerant documentation for regulatory reporting.
Does the unit support external temperature feedback control?
No—the FLW11006 regulates based on internal bath sensor only. For process-coupled control, users must implement external PID controllers interfaced via analog output modules or PLC logic.
What maintenance intervals are recommended?
Compressor oil and refrigerant levels require verification every 24 months; condenser and reservoir cleaning is advised annually. JULABO recommends using only OEM-certified Thermal G fluids to preserve heat exchanger efficiency and warranty validity.