Tianfeng LS-25KW Integrated Circulating Chiller

Overview

The Tianfeng LS-25KW Integrated Circulating Chiller is an industrial-grade, water-cooled temperature control system engineered for continuous-duty laboratory and precision equipment cooling applications. It operates on a vapor-compression refrigeration cycle using a scroll-type compressor—selected for its mechanical robustness, low vibration, and high volumetric efficiency—paired with internationally sourced thermal expansion valves and electromagnetic components (including Italian and German OEM parts). The chiller maintains precise thermal setpoints via a digital PID controller, delivering stable coolant output within ±0.1 °C across a 0–40 °C operational range. Designed to serve as a closed-loop heat rejection interface, it removes waste heat from sensitive instrumentation—including analytical spectrometers, electron microscopes, X-ray diffractometers, and plasma-based systems—thereby preventing thermal drift, preserving optical alignment, stabilizing detector response, and extending component service life. Its integrated architecture eliminates external piping complexity while ensuring rapid thermal equilibration and minimal ambient heat ingress.

Key Features

• Stable temperature regulation with ±0.1 °C accuracy over extended continuous operation (24/7 duty cycle supported)
• 200 L insulated stainless-steel reservoir with corrosion-resistant internal coating and level-sensing float switch
• High-capacity centrifugal circulation pump delivering up to 38 L/min at 2.0 bar maximum head pressure
• Dual-mode operation: fixed-setpoint constant-temperature mode and adaptive intelligent temperature modulation based on real-time load feedback
• Comprehensive safety suite including compressor overheat protection, high/low refrigerant pressure cutoffs, phase-loss detection, and overtemperature shutdown
• Front-panel digital display showing real-time outlet temperature, system status, and fault codes
• Modular electrical architecture featuring Schneider, Siemens, or Omron contactors, relays, and circuit protection devices
• ISO 9001:2000-certified manufacturing process with full traceability of critical components and final-system performance validation

Sample Compatibility & Compliance

The LS-25KW chiller is compatible with a broad spectrum of laboratory and industrial end-use equipment requiring consistent coolant delivery at defined thermal and hydraulic parameters. It meets the thermal interface requirements of ICP-OES, ICP-MS, GFAAS, XRF, SEM, TEM, and XRD systems—particularly where coolant inlet temperature must remain ≤12 °C and ΔT across the instrument’s heat exchanger is constrained to 3–5 °C. All wetted surfaces are constructed from AISI 304 stainless steel, ensuring compatibility with deionized water, 20% ethylene glycol/water mixtures, and other non-corrosive heat-transfer fluids commonly specified in ASTM D1384 and ISO 8502 standards. The unit complies with CE electromagnetic compatibility directives (2014/30/EU) and low-voltage safety requirements (2014/35/EU). While not inherently 21 CFR Part 11 compliant, its optional analog/digital signal outputs (0–10 V / 4–20 mA) support integration into validated GLP/GMP environments when paired with audit-trail-capable SCADA or LIMS platforms.

Software & Data Management

The LS-25KW operates autonomously via embedded firmware without dependency on external software. However, it provides standardized analog and digital I/O interfaces—including isolated 4–20 mA output for remote temperature monitoring, dry-contact alarm relays for integration into building management systems (BMS), and RS-485 Modbus RTU port (optional) for programmable logic controller (PLC) interfacing. When deployed in regulated laboratories, users may configure external data loggers to record timestamped temperature, pressure, and flow metrics at user-defined intervals (e.g., every 15 seconds), satisfying raw data retention requirements under FDA 21 CFR Part 11 Annex 11 when combined with appropriate electronic signature and audit trail protocols. No proprietary cloud platform or vendor-hosted software is required or provided.

Applications

• Laboratory instrumentation cooling: graphite furnace atomic absorption spectrometers (GFAAS), inductively coupled plasma optical emission spectrometers (ICP-OES), and mass spectrometers (ICP-MS) requiring stable plasma torch and detector cooling
• Materials characterization tools: scanning and transmission electron microscopes (SEM/TEM), X-ray fluorescence (XRF) analyzers, and X-ray diffractometers (XRD) where thermal lensing and detector noise must be minimized
• Precision machining support: CNC spindles, coordinate boring machines, and grinding systems demanding oil or coolant temperature stabilization to limit thermal growth-induced dimensional error
• Plastics processing: mold temperature control in injection molding to reduce cycle time, eliminate warpage, and improve surface finish per ASTM D955 and ISO 294
• Vacuum and thin-film systems: sputtering and evaporation sources requiring consistent anode/cathode thermal management to ensure deposition uniformity
• Pharmaceutical manufacturing: fermentation vessel jacket cooling and lyophilizer condenser support in compliance with USP analytical instrument qualification guidelines

FAQ

What is the recommended maximum return water temperature for continuous operation?
The chiller is rated for sustained operation with return water temperatures ≤40 °C. Exceeding this threshold increases compressor discharge pressure and reduces refrigerant subcooling margin, accelerating wear and potentially triggering high-pressure cutout protection.
Can the unit operate with a 20% ethylene glycol solution?
Yes—the stainless-steel fluid path and selected elastomers are compatible with aqueous glycol mixtures up to 30% concentration. Viscosity increase must be accounted for in flow rate calculations; consult the pump curve for derated performance at elevated fluid viscosity.
Is remote monitoring and alarm notification supported?
Standard configuration includes dry-contact alarm outputs (e.g., for high-temperature, low-flow, or compressor fault). Optional RS-485 Modbus RTU enables integration with third-party SCADA or BMS for real-time telemetry and event logging.
Does the chiller meet international electrical safety standards?
It conforms to IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emissions) for industrial environments, and carries CE marking for Low Voltage Directive (2014/35/EU) and EMC Directive (2014/30/EU) compliance.
What maintenance intervals are recommended for laboratory-grade reliability?
Annual inspection of refrigerant charge, condenser coil cleaning, electrical connection torque verification, and calibration of the temperature sensor against NIST-traceable reference standards are advised. Filter-drier replacement is recommended every 24 months under continuous operation.