Hanuo DL-30 Series Low-Temperature Circulating Chiller
| Brand | Hanuo |
|---|---|
| Model | DL-3005 / DL-3010 / DL-3020 / DL-3030 / DL-3050 |
| Cooling Method | Air-Cooled |
| Temperature Range | −30 °C |
| Temperature Stability | ±0.5 °C |
| Refrigeration Capacity | 150–3800 W |
| Reservoir Volume | 5–50 L |
| Circulation Flow Rate | 15 L/min |
| Pump Pressure | 0 bar (rated head) |
| Continuous Operation Mode | Yes |
| Construction | Integrated Unit |
Overview
The Hanuo DL-30 Series Low-Temperature Circulating Chiller is an integrated, air-cooled refrigeration system engineered for precise thermal management in laboratory and analytical applications. It employs a hermetically sealed compressor-based refrigeration cycle coupled with microprocessor-controlled PID temperature regulation to deliver stable, continuous low-temperature coolant circulation. Designed to operate at a minimum setpoint of −30 °C, the unit supplies conditioned heat-transfer fluid—typically water or water-glycol mixtures—to external equipment requiring active cooling or isothermal operation. Its thermodynamic architecture ensures consistent thermal load handling across variable ambient conditions, making it suitable for integration into sensitive instrumentation workflows where thermal drift must be minimized.
Key Features
- PID-based digital temperature control with ±0.5 °C stability over the full operating range (−30 °C to ambient), enabling reproducible experimental conditions.
- Air-cooled, hermetically sealed compressor system with built-in safeguards including compressor delay start, overheat protection, and overcurrent cutoff—enhancing operational reliability and service life.
- Integrated high-flow circulation pump delivering up to 15 L/min at zero backpressure (open-loop configuration); compatible with standard 1/4″–3/8″ tubing connections.
- Five scalable reservoir capacities (5 L, 10 L, 20 L, 30 L, and 50 L) matched to corresponding refrigeration outputs (150 W to 3800 W), allowing selection based on thermal load and external loop volume.
- Continuous-duty design certified for 24/7 operation under nominal load; no duty-cycle limitations or mandatory cooldown intervals.
- Front-panel LED interface with real-time display of setpoint, actual bath temperature, and system status indicators (e.g., compressor active, low-level alarm).
Sample Compatibility & Compliance
The DL-30 Series is routinely deployed as a thermal management subsystem for instruments demanding stable sub-ambient operation—including rotary evaporators, cryo-electron microscopy stages, vacuum deposition systems, benchtop NMR precooling circuits, freeze dryers, and jacketed reaction vessels. Its coolant output meets general-purpose laboratory fluid compatibility requirements for aqueous and glycol-based heat-transfer media (up to 30% ethylene glycol). While not certified to ISO/IEC 17025 or GLP-specific validation protocols out-of-the-box, the chiller’s deterministic temperature response and alarm logging capability support IQ/OQ documentation when integrated into regulated environments. It complies with IEC 61000-6-3 (EMC emission standards) and IEC 61000-6-2 (immunity), and conforms to RoHS Directive 2011/65/EU for hazardous substance restriction.
Software & Data Management
The base model operates via standalone front-panel control without external software dependency. Optional RS-485 serial interface (Modbus RTU protocol) enables integration with centralized lab monitoring platforms or SCADA systems for remote setpoint adjustment, temperature logging, and fault reporting. When paired with third-party data acquisition software (e.g., LabVIEW, MATLAB, or custom Python scripts), users can implement automated thermal profiling, event-triggered alerts, and audit-trail generation—supporting alignment with FDA 21 CFR Part 11 requirements when combined with appropriate electronic signature and access control layers. No embedded data storage or cloud connectivity is provided in standard configuration.
Applications
- Cooling condenser jackets on rotary evaporators during solvent removal at elevated bath temperatures.
- Maintaining cryogenic sample stages in electron microscopy and X-ray diffraction systems.
- Thermal stabilization of laser sources, photodetectors, and spectroscopic detectors subject to thermal noise.
- Providing secondary cooling loops for jacketed bioreactors and chemical synthesis reactors operating below ambient.
- Precooling inlet streams to gas chromatography (GC) injectors or mass spectrometer ion sources to improve compound retention and detection sensitivity.
- Direct immersion experiments in the reservoir for small-volume low-temperature reaction screening or material property testing.
FAQ
What is the lowest achievable temperature for the DL-30 Series?
The system maintains a stable setpoint down to −30 °C under standard ambient conditions (≤25 °C, ≤60% RH). Performance may degrade slightly at higher ambient temperatures due to reduced condenser efficiency.
Can this chiller be used with organic solvents in the coolant loop?
No. The internal wetted parts (reservoir, pump, tubing) are designed for water or water–glycol mixtures only. Exposure to acetone, chloroform, THF, or other organic solvents will damage seals and impellers.
Is the circulation pump self-priming?
Yes—the centrifugal pump is self-priming up to 0.5 m suction lift and requires no manual venting under normal installation conditions.
Does the unit include a filtration system for the coolant?
A 100 µm mesh inlet strainer is factory-installed to prevent particulate ingress; however, no inline particulate or microbial filter is included. Users operating in cleanroom or GMP contexts should add external filtration per ISO 8573 or USP requirements.
How often does the refrigerant require servicing?
Under normal operation and proper ventilation, the sealed R404A or R507 refrigerant circuit requires no scheduled maintenance or recharge over its rated service life of ≥10,000 hours.
