Tongzhou Weipu RG02 XRD-Dedicated Split-Type Circulating Chiller
| Brand | Tongzhou Weipu |
|---|---|
| Origin | Tianjin, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Split-Type |
| Cooling Method | Water-Cooled |
| Temperature Stability Range | 5–35 °C |
| Temperature Stability | ±0.1 °C |
| Refrigeration Capacity | 5.6 kW |
| Circulating Pump Pressure | 3.6 bar |
| Circulating Pump Flow Rate | 60 L/min |
| Reservoir Volume | 60 L |
Overview
The Tongzhou Weipu RG02 is a purpose-engineered split-type circulating chiller designed specifically for thermal management of high-power X-ray diffraction (XRD) systems. Unlike general-purpose chillers, the RG02 integrates thermodynamic and acoustic design principles to meet the stringent operational requirements of laboratory XRD instrumentation—including stable heat extraction from high-voltage X-ray tubes, precise temperature control to minimize thermal drift in goniometer positioning, and ultra-low vibration transmission to preserve optical alignment integrity. Its dual-unit architecture separates heat-generating components (compressor, condenser, exhaust fan) into an outdoor unit—thereby eliminating thermal load and dominant noise sources from the lab environment—while the indoor unit houses only the circulation pump, stainless-steel reservoir, and evaporator coil. This configuration ensures consistent coolant delivery at constant temperature and pressure without compromising analytical stability or operator comfort.
Key Features
- Split-system architecture with acoustically isolated outdoor unit: Compressor, air-cooled condenser, and variable-speed exhaust fan operate exclusively outside the laboratory, reducing ambient noise to <45 dB(A) indoors.
- Industrial-grade outdoor unit construction: All structural components are fabricated from corrosion-resistant metal; no plastic housings are used in critical refrigerant pathways or structural frames—ensuring >15-year service life under continuous operation.
- Wide ambient adaptability: Equipped with crankcase heater and intelligent fan speed modulation to maintain reliable compressor start-up and condensing efficiency across outdoor ambient temperatures ranging from –15 °C to +45 °C.
- High-flow, high-pressure circulation: Delivers up to 60 L/min at 3.6 bar, supporting XRD systems with long coolant loops, multi-point cooling manifolds, or high-resistance heat exchangers.
- Stainless-steel reservoir with large access port: 60 L capacity tank features a wide-diameter opening and mirror-polished interior surface for visual water quality inspection, residue monitoring, and full-access cleaning—critical for preventing biofilm formation or particulate contamination in recirculated deionized water.
- Comprehensive safety protection suite: Includes real-time monitoring of refrigerant high/low pressure, compressor winding temperature, motor current draw, phase sequence, and phase loss—with automatic shutdown and latching fault indication per IEC 61800-5-2 safety standards.
Sample Compatibility & Compliance
The RG02 is engineered to interface seamlessly with major XRD platforms including Rigaku SmartLab, Bruker D8 ADVANCE, PANalytical Empyrean, and Thermo Scientific ARL EQUINOX systems. It circulates deionized or low-conductivity water (typical resistivity >1 MΩ·cm) through closed-loop cooling circuits compliant with IEC 61000-6-3 (EMC emissions) and IEC 61000-6-2 (immunity). Its temperature stability of ±0.1 °C over 5–35 °C range meets ASTM E2912-21 requirements for thermal control in diffraction-based structural analysis. The chiller’s mechanical design adheres to ISO 13849-1 PL e / Category 4 safety architecture for critical protection functions, and its electrical interface conforms to UL 61010-1 and CE Machinery Directive 2006/42/EC.
Software & Data Management
The RG02 operates as a standalone analog-controlled system with digital setpoint display and local parameter adjustment via front-panel keypad. No proprietary software or network connectivity is required—minimizing cybersecurity exposure and compatibility dependencies. All operational parameters (set temperature, actual bath temperature, pump status, fault codes) are continuously displayed on a high-contrast LCD. For integration into GLP/GMP environments, optional RS485 Modbus RTU output enables connection to building management systems (BMS) or centralized lab monitoring platforms for audit-trail-capable logging of temperature excursions, runtime hours, and alarm events—supporting compliance with FDA 21 CFR Part 11 when paired with validated data acquisition software.
Applications
- Primary cooling for sealed-tube and rotating-anode X-ray sources in single-crystal and powder XRD systems.
- Thermal stabilization of detector assemblies (e.g., CCD, CMOS, silicon strip detectors) where temperature-induced gain drift affects intensity calibration.
- Supporting synchrotron beamline end-stations requiring low-noise, high-reproducibility coolant supply for sample stages and optics enclosures.
- Secondary cooling loop for high-power laser-based XRD accessories (e.g., laser heating stages, Raman/XRD hybrid modules).
- General-purpose precision cooling for other heat-sensitive analytical instruments including high-resolution TEM sample holders, FTIR interferometers, and high-field NMR console electronics.
FAQ
Is the RG02 compatible with deionized water systems?
Yes—the stainless-steel reservoir and all wetted components (pump head, evaporator, piping) are electropolished 316 stainless steel, fully compatible with DI water resistivity ≥1 MΩ·cm and pH 5.5–7.5.
What is the maximum allowable coolant loop length?
For optimal temperature stability and pressure margin, the recommended total equivalent pipe length is ≤30 meters with ≤3 m vertical lift; longer loops require hydraulic verification.
Does the chiller support remote start/stop or external temperature setpoint input?
Standard configuration includes dry-contact remote enable/disable; optional 0–10 V or 4–20 mA analog setpoint interface is available upon request.
Can the RG02 be operated in unheated laboratories during winter?
Yes—the outdoor unit incorporates crankcase heating and low-ambient fan control, enabling reliable operation down to –15 °C ambient; indoor unit requires ambient >5 °C to prevent condensation-related electrical hazards.
What maintenance intervals are recommended?
Compressor oil and refrigerant charge require inspection every 24 months; water filter replacement and reservoir cleaning are recommended quarterly in DI water applications.
