MDF-86V58 Ultra-Low Temperature Freezer by Duling
| Brand | Duling |
|---|---|
| Origin | Anhui, China |
| Model | MDF-86V58 |
| Type | Upright |
| Effective Volume | 58 L |
| Inner Chamber Dimensions (mm) | 330 × 453 × 410 |
| External Dimensions (mm) | 635 × 757 × 1212 |
| Power Supply | 220 V / 50 Hz |
| Rated Power Consumption | 442 W |
| Country of Manufacture | China |
| Distributor Type | Authorized General Distributor |
| Price Range | USD 4,200 – 7,000 (FOB Anhui) |
Overview
The MDF-86V58 is a compact upright ultra-low temperature (ULT) freezer engineered for reliable long-term storage of sensitive biological specimens at −86 °C. Designed for laboratories with space constraints yet uncompromising requirements for thermal stability and sample integrity, this unit employs a dual-stage cascade refrigeration system—comprising a high-temperature stage (R134a) and low-temperature stage (R23)—to achieve and maintain the target setpoint across its full operational range (−40 °C to −86 °C). Its microprocessor-controlled temperature management system features PID algorithm-based regulation, real-time monitoring via PT100 sensors, and ±1 °C uniformity within the working chamber under standard IEC 61000-4-2 test conditions. The cabinet’s vacuum-insulated panels (VIPs) and polyurethane foam (120 mm thickness) minimize heat ingress, supporting energy-efficient operation while meeting IEC 60068-2-1 (cold) and IEC 60068-2-2 (dry heat) environmental testing standards.
Key Features
- Stable −86 °C operation with <1.5 °C temperature fluctuation (±0.75 °C) over 24-hour continuous monitoring per ISO 13485-aligned validation protocols
- Upright configuration with ergonomic door design, featuring magnetic gasket seal and mechanical lock for secure access control
- Intelligent alarm system with audible/visual alerts for high-temperature deviation, power failure, door ajar, and sensor fault conditions
- Non-CFC refrigerants compliant with Montreal Protocol Phase-Out Schedule and EU F-Gas Regulation (EU) No 517/2014
- Robust stainless steel interior (304 grade) and corrosion-resistant exterior housing suitable for GLP-compliant environments
- Low-noise operation (<52 dB(A) at 1 m), optimized for shared laboratory spaces without acoustic interference
Sample Compatibility & Compliance
The MDF-86V58 accommodates cryovials (0.5–2.0 mL),冻存管 racks (standard 9×9 or 10×10 formats), and small-format tissue cassettes. Its uniform internal airflow design ensures minimal thermal gradient across all storage zones, critical for preserving viability of primary cell lines, PBMCs, RNA samples, and viral vectors. The unit supports traceability requirements through optional data logger integration (RS485 interface), enabling audit-ready temperature logging aligned with FDA 21 CFR Part 11 Annex 11 expectations for electronic records. While not certified to UL 471 or NSF/ANSI 456 out-of-the-box, it meets GB/T 20154–2014 (Chinese national standard for ULT freezers) and is compatible with third-party IQ/OQ/PQ validation packages for GMP and biobanking applications.
Software & Data Management
The embedded controller provides local display of real-time temperature, setpoint, alarm history (last 100 events), and compressor runtime. Optional Ethernet or Wi-Fi modules enable remote monitoring via web-based dashboards supporting SNMP v3 and Modbus TCP protocols. Data export is supported in CSV format with timestamped entries; raw logs comply with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available) when paired with validated time-synchronized NTP servers. Firmware updates are delivered via USB port with SHA-256 signature verification to ensure integrity.
Applications
- Long-term archival storage of clinical biospecimens in hospital biorepositories and academic core facilities
- Cryopreservation of induced pluripotent stem cells (iPSCs), embryonic stem cells (ESCs), and organoid cultures requiring stringent thermal fidelity
- Stabilization of thermolabile reagents including restriction enzymes, reverse transcriptases, and CRISPR-Cas ribonucleoprotein complexes
- Supporting ISO/IEC 17025-accredited testing labs performing stability studies under ICH Q5C guidelines
- Backup cold chain node in decentralized diagnostic networks operating under WHO PQS-E001 cold chain equipment specifications
FAQ
What is the recommended ambient operating temperature range for the MDF-86V58?
The unit is rated for continuous operation in ambient environments between +10 °C and +32 °C, with relative humidity ≤70% non-condensing.
Does the freezer support external temperature monitoring systems?
Yes—via RS485 Modbus RTU interface, allowing integration with building management systems (BMS) or centralized lab monitoring platforms such as LabVantage or Thermo Fisher SampleManager.
Is validation documentation available for GxP environments?
Duling provides a User Requirement Specification (URS) template and Factory Acceptance Test (FAT) report; site-specific IQ/OQ protocols require engagement with authorized service partners trained to ISO/IEC 17020 standards.
Can the MDF-86V58 be installed in a non-ventilated room?
No—minimum 10 cm clearance on all sides and rear is required for condenser airflow; installation in enclosed cabinets or unventilated rooms voids warranty and compromises thermal performance.
What maintenance intervals are recommended?
Compressor oil inspection every 24 months; condenser coil cleaning every 6 months in standard lab environments; door gasket integrity check quarterly per ISO 55001 asset management guidance.
