Shanghai Youyi DHG-9645A Precision Forced-Air Constant-Temperature Drying Oven

Overview

The Shanghai Youyi DHG-9645A is a high-capacity, precision-engineered forced-air drying oven designed for rigorous laboratory and industrial thermal processing applications. Utilizing a robust convection-based heating architecture, it maintains stable, uniform temperature distribution across its 640 L working chamber—critical for applications requiring reproducible thermal treatment, moisture removal, sterilization, or pre-conditioning of materials. Its operational range spans from ambient +20°C up to 300°C, with a calibrated temperature fluctuation of ±1°C and uniformity of ±2.5% (measured at 100°C under no-load conditions), meeting the performance benchmarks defined in GB/T 30435–2013 for electrically heated drying ovens. The unit features an intelligent microprocessor-based temperature controller with real-time monitoring, programmable timing, and dual-stage overtemperature protection—ensuring both process fidelity and operational safety in extended unattended runs.

Key Features

• Forced-air circulation system with rear-mounted intake/exhaust ducts and adjustable airflow path, enabling efficient vapor evacuation and minimizing condensation buildup during prolonged drying cycles.
• Double-layer tempered glass observation window with large viewing area, facilitating non-intrusive visual monitoring of sample status without compromising chamber integrity or thermal stability.
• High-grade mirror-finish stainless steel interior chamber (SUS304), corrosion-resistant and easy to decontaminate—ideal for pharmaceutical, food, and biological applications where cleanliness and traceability are essential.
• Exterior constructed from cold-rolled steel with electrostatic powder coating; door seal employs high-temperature silicone rubber gasket rated for continuous operation up to 300°C, ensuring long service life and reliable thermal insulation.
• Intelligent LCD interface supporting menu-driven operation: simultaneous display of setpoint temperature, actual chamber temperature, elapsed time, and remaining hold time—enhancing usability and reducing operator error.
• Power-fail recovery function retains user-defined parameters (setpoint, timer, alarm thresholds) during unexpected shutdowns, resuming operation automatically upon power restoration.
• Independent mechanical overtemperature cutoff (optional) provides redundant safety layer compliant with IEC 61000-4-5 surge immunity and EN 61010-1 safety standards for laboratory equipment.

Sample Compatibility & Compliance

The DHG-9645A accommodates a broad spectrum of sample types—including glassware, metal components, polymer specimens, ceramic substrates, filter membranes, and bulk powders—without risk of thermal degradation or cross-contamination. Its inert chamber environment supports ISO 17025-accredited calibration workflows and aligns with GLP/GMP documentation requirements when paired with optional RS485 data logging or embedded printer modules. While not intrinsically certified for hazardous location use (e.g., ATEX or UL Class I Div 2), the oven may be integrated into controlled environments under site-specific risk assessments. It complies fully with Chinese national standard GB/T 30435–2013 and meets foundational electrical safety and electromagnetic compatibility criteria per GB 4793.1–2007 (equivalent to IEC 61010-1).

Software & Data Management

The standard control system operates via standalone firmware with no external software dependency. Optional RS485 communication port enables integration with SCADA systems, LIMS, or custom Python/Node-RED scripts for automated data capture—supporting Modbus RTU protocol for register-level access to temperature logs, alarm events, and cycle status. An optional embedded thermal printer provides hard-copy audit trails compliant with FDA 21 CFR Part 11 when used with timestamped, user-identifiable printouts (requires role-based access configuration). All optional peripherals—including multi-segment programmable controllers and inert gas inlet kits—are factory-installed and calibrated, preserving system-wide metrological traceability.

Applications

This oven serves as a core thermal processing tool across multiple regulated and research-intensive domains: moisture content determination per AOAC 950.46 and ASTM D2216; residual solvent evaporation in polymer synthesis; pre-baking of PCB assemblies prior to soldering; accelerated aging studies of elastomers and composites; depyrogenation of glass vials and stoppers in biopharmaceutical manufacturing; drying of botanical extracts and agricultural samples for gravimetric analysis; and heat stabilization of reference standards before analytical weighing. Its 640 L capacity and uniform airflow profile make it particularly suited for batch processing of large-format substrates such as solar cell wafers, battery electrode sheets, and composite laminates.

FAQ

What is the maximum operating temperature and how is thermal stability ensured?
The DHG-9645A is rated for continuous operation up to 300°C. Stability is maintained via PID-controlled heating elements, symmetrical air distribution channels, and real-time feedback from dual platinum resistance thermometers (PRTs) — one for control, one for independent verification.
Can this oven be validated for GMP-compliant processes?
Yes — when equipped with optional data logging (RS485 + software) or thermal printer, it supports IQ/OQ documentation, including temperature mapping per ISO 14644-3 and alarm event logging required for FDA audits.
Is inert atmosphere operation supported?
An optional inert gas inlet kit (with needle valve and float-type flowmeter) allows nitrogen or argon purging to prevent oxidation during heat treatment of sensitive alloys or active pharmaceutical ingredients.
Are replacement parts and calibration services available internationally?
Shanghai Youyi provides OEM-certified spare parts (seals, PRT sensors, fan assemblies) and third-party calibration support through authorized regional service partners in North America, EU, and APAC regions.
Does the unit meet energy efficiency standards for laboratory equipment?
It conforms to China’s GB 30253–2013 minimum energy performance requirements for electric ovens and achieves an average thermal efficiency of ≥72% at 150°C steady state, verified per ISO 50001-aligned test protocols.