Hefei Kejing EQ-CW3000AG-220 Air-Cooled Recirculating Chiller

Overview

The Hefei Kejing EQ-CW3000AG-220 is an air-cooled recirculating chiller engineered for stable, continuous thermal management in laboratory environments where precise temperature control and reliable coolant delivery are critical. Designed to support heat-sensitive instrumentation—including analytical spectrometers, laser systems, vacuum pumps, and bottle washers—the unit operates on a closed-loop principle, circulating deionized or distilled water (or compatible aqueous coolant mixtures) at user-defined setpoints within a typical ambient range of 15–35 °C. Its thermoelectric and compressor-assisted cooling architecture delivers consistent thermal regulation with ±1 °C stability, enabling reproducible experimental conditions across extended operation cycles. Unlike water-cooled chillers requiring external plumbing or facility water supply, the EQ-CW3000AG-220 integrates passive air-cooling via high-efficiency axial fans and finned condenser arrays—eliminating dependency on municipal water lines while maintaining low operational noise and minimal infrastructure footprint.

Key Features

• Stable temperature control with ±1 °C accuracy across the full operating range (typically 5–35 °C setpoint), achieved via PID-controlled refrigeration circuit and integrated PT100 sensor feedback loop
• Maximum flow rate of 10 L/min at up to 10 m head pressure—sufficient to service multiple parallel instruments or high-resistance fluid paths common in automated bottle washer manifolds and cleaning chamber jackets
• 9-liter stainless steel reservoir with level indicator and overflow protection; corrosion-resistant copper inlet/outlet ports (Φ10 mm) ensure long-term compatibility with standard laboratory tubing (e.g., Tygon®, Viton®)
• Integrated flow alarm system triggers visual and audible alerts upon detection of low-flow conditions—critical for preventing dry-run damage to connected equipment such as peristaltic pumps or heating elements
• CE-certified electrical architecture compliant with EN 61000-6-3 (EMC) and EN 61000-6-2 (immunity); designed for continuous 24/7 operation under GLP-aligned laboratory conditions
• Compact footprint (47 × 27 × 37 cm) and 100 lbs net weight facilitate benchtop or under-bench installation without structural reinforcement

Sample Compatibility & Compliance

The EQ-CW3000AG-220 is compatible with a wide range of laboratory equipment requiring active liquid cooling, including but not limited to glassware cleaning systems (e.g., industrial bottle washers with heated rinse stages), rotary evaporators, ICP-MS torch coolers, and electrophoresis power supplies. It supports aqueous coolants only—non-corrosive, non-flammable solutions with pH 6.5–8.5 and conductivity <100 µS/cm are recommended to preserve internal pump seals and heat exchanger integrity. The unit meets CE marking requirements for electromagnetic compatibility and low-voltage safety (2014/35/EU and 2014/30/EU). While not certified to ISO 13485 or FDA 21 CFR Part 11, its design aligns with general Good Laboratory Practice (GLP) expectations for traceable, documented thermal control in QC/QA workflows involving cleaning validation or equipment qualification.

Software & Data Management

This model operates via front-panel digital interface with LED display, offering manual setpoint adjustment, real-time temperature readout, and status indicators for flow, temperature deviation, and system fault. No proprietary software or USB/RS-232 connectivity is included; however, analog 0–10 V or 4–20 mA output options (available as factory-configurable add-ons) enable integration into centralized building management systems (BMS) or PLC-controlled lab automation platforms. Audit-ready documentation—including CE declaration of conformity, electrical schematics, and maintenance log templates—is provided with shipment to support ISO/IEC 17025 or CAP-accredited laboratory compliance programs.

Applications

• Thermal stabilization of high-throughput bottle washers during alkaline or acid rinse cycles, ensuring consistent detergent activation and residue removal efficacy
• Cooling of vacuum pump housings and motor windings to extend service life and maintain vacuum integrity during extended sterilization cycles
• Support of chromatographic detectors (e.g., UV-Vis, fluorescence) requiring constant cell temperature to minimize baseline drift
• Temperature conditioning of reaction blocks in automated sample preparation stations prior to HPLC injection
• Backup cooling redundancy for critical instruments in labs lacking centralized chilled water infrastructure

FAQ

What types of coolant fluids are compatible with the EQ-CW3000AG-220?

Deionized water, distilled water, or commercially formulated water-glycol mixtures (≤30% v/v propylene glycol) with pH 6.5–8.5 and low conductivity (<100 µS/cm) are recommended. Ethylene glycol and organic solvents are prohibited.
Does this chiller support remote monitoring or network integration?

The base unit lacks built-in Ethernet or Wi-Fi capability. Optional analog outputs (0–10 V / 4–20 mA) can be specified at time of order for integration with third-party SCADA or BMS systems.
Is the reservoir accessible for routine maintenance and descaling?

Yes—the top cover is removable, providing direct access to the reservoir interior, pump impeller, and level sensor for inspection, cleaning, or biocide dosing per institutional biosafety protocols.
Can it operate continuously for 24/7 applications?

Yes. The unit is rated for uninterrupted duty cycle under ambient temperatures ≤35 °C and relative humidity <80% non-condensing, with thermal overload protection embedded in both compressor and pump circuits.
What documentation is included for regulatory audits?

CE DoC, electrical safety test report, mechanical drawings, and a blank preventive maintenance log are supplied. Custom IQ/OQ documentation packages are available upon request for GxP-regulated facilities.