Julabo FL20006 Circulating Chiller

Overview

The Julabo FL20006 Circulating Chiller is a high-capacity, air-cooled, integrated refrigeration system engineered for demanding thermal management in research laboratories, pilot-scale process development, and industrial applications requiring precise, stable, and continuous cooling. Based on vapor-compression refrigeration using a single-stage hermetic compressor and R404A refrigerant, the FL20006 delivers up to 20 kW of refrigeration capacity at standard ambient conditions (20 °C ambient, 20 °C setpoint), with operational capability across a wide temperature range from −20 °C to +40 °C. Its robust architecture supports uninterrupted 24/7 operation, making it suitable for integration with high-heat-load equipment such as NMR spectrometers, laser systems, plasma etchers, and large-scale reactors. Designed to replace inefficient and resource-intensive tap-water cooling, the FL20006 significantly reduces water consumption while maintaining strict thermal stability—critical for reproducible experimental outcomes and process validation under GLP or GMP frameworks.

Key Features

• High-power air-cooled refrigeration system with 20 kW nominal capacity and extended low-temperature capability down to −20 °C
• Precision temperature control with stability of ±0.5 °C and 0.1 °C resolution on LED display
• High-flow circulation pump delivering up to 80 L/min at adjustable pressure (0.8–6.0 bar), compatible with long-loop or high-backpressure applications
• Large-volume reservoir (15–37 L) with level indicator and top-fill access for operational convenience and reduced maintenance downtime
• Robust fluid compatibility: validated for water, aqueous glycol mixtures (up to 50% v/v), and JULABO-certified thermal fluids; maximum return fluid temperature tolerance of 80 °C ensures safe integration with exothermic processes
• Integrated safety systems including overtemperature, low-level, high-pressure, and compressor overload protection
• Standard RS232 interface for remote monitoring and control; Profibus option available for PLC-based automation environments
• Compliant with IEC 61000-6-3 (EMC) and IEC 61000-6-2 (immunity); CE-marked and RoHS-conformant

Sample Compatibility & Compliance

The FL20006 is not a sample-analysis instrument but a thermal utility platform supporting a broad spectrum of heat-transfer media and connected instrumentation. It accommodates closed-loop cooling circuits using deionized water, 20–50% ethylene or propylene glycol/water blends, or JULABO Thermal G series heat-transfer fluids—each selected per application-specific requirements for freeze protection, flash point, viscosity, and chemical inertness. The unit meets ISO 14001 environmental design principles through its optimized refrigerant charge and energy-efficient compressor staging. For regulated environments—including pharmaceutical QC labs and medical device manufacturing—the FL20006 supports audit-ready operation when paired with validated temperature mapping protocols and electronic log generation (via RS232 or optional SCADA integration), aligning with FDA 21 CFR Part 11 data integrity expectations where configured with appropriate software and access controls.

Software & Data Management

While the FL20006 operates autonomously via its front-panel interface, its RS232 port enables bidirectional communication with host systems for real-time parameter logging, alarm event capture, and setpoint scheduling. Third-party LabVIEW, Python (PySerial), or MATLAB scripts can be deployed to acquire timestamped temperature, pressure, flow status, and compressor runtime data—enabling trend analysis and preventive maintenance planning. Optional Profibus-DP integration permits direct connection to Siemens S7 or Allen-Bradley ControlLogix PLCs, supporting centralized HVAC and process cooling orchestration in cGMP facilities. All digital interactions are non-volatile and support configurable data retention intervals; no proprietary cloud service or vendor-hosted platform is required.

Applications

• Cooling of high-field NMR and MRI magnet cryocoolers and RF amplifiers
• Thermal regulation of semiconductor fabrication tools (e.g., etch chambers, CVD reactors)
• Process cooling for pilot-plant reactors, distillation columns, and calorimeters
• Stabilization of laser sources (CO₂, fiber, excimer) and optical benches requiring sub-degree thermal drift control
• Support of accelerated stability testing chambers and environmental stress screening (ESS) systems
• Replacement of municipal water cooling in LEED-certified laboratory buildings to meet sustainability targets

FAQ

What is the maximum allowable return fluid temperature?
The FL20006 accepts return fluid temperatures up to 80 °C, enabling safe integration with moderate-exothermic equipment without thermal shock to the chiller’s evaporator.
Can the unit operate continuously at −20 °C ambient?
No—the specified ambient operating range is 5–40 °C. Operation below 5 °C requires optional low-ambient kit (e.g., compressor crankcase heater, fan speed modulation) to prevent oil migration and refrigerant floodback.
Is R404A refrigerant compliant with current EU F-Gas regulations?
R404A is subject to phase-down under EU Regulation (EU) No 517/2014; Julabo provides technical documentation and retrofit guidance for future transition to lower-GWP alternatives (e.g., R449A or R452A) where permitted by local codes.
Does the FL20006 support external temperature feedback control?
Yes—via analog input (0–10 V or 4–20 mA) when equipped with the optional PID feedback module, allowing dynamic setpoint adjustment based on process sensor readings.
What certifications does the FL20006 hold for use in North American laboratories?
The unit carries ETL listing (UL 61010-1, CSA C22.2 No. 61010-1) and complies with ANSI Z241.1 for laboratory refrigeration equipment safety.