Shanghai Youyi DHG-9965A Vertical 1000L Precision Forced-Air Drying Oven (300 °C)

Overview

The Shanghai Youyi DHG-9965A is a vertically oriented, high-capacity precision forced-air drying oven engineered for demanding laboratory and industrial thermal processing applications. Designed in strict accordance with the Chinese national standard GB/T 30435–2013 for electric heating drying ovens, it delivers stable, repeatable thermal environments across its full operating range of RT+20 °C to 300 °C. Its 1000 L internal chamber—measuring 1000 mm (W) × 800 mm (D) × 1300 mm (H)—supports large-scale batch processing of samples, components, or materials requiring uniform convective heat transfer. The oven employs a rear-mounted centrifugal blower and a symmetrical air duct architecture to ensure consistent airflow distribution, minimizing thermal gradients and achieving ≤±2.5% temperature uniformity (tested at 100 °C, empty chamber). Its robust construction includes a cold-rolled steel exterior with electrostatic epoxy coating and a mirror-finish SUS304 stainless steel interior, offering long-term corrosion resistance and ease of cleaning—critical for pharmaceutical, food safety, and materials R&D workflows.

Key Features

• Microprocessor-based intelligent temperature controller with PID algorithm, supporting setpoint programming, real-time monitoring, and multi-stage timing (1–9999 minutes)
• Large backlit LCD interface displaying set temperature, actual chamber temperature, elapsed time, and remaining hold time simultaneously
• Double-layer tempered glass observation window with wide-angle viewing field for non-intrusive process monitoring without thermal loss
• Dual independent safety systems: primary PID control loop + optional mechanical over-temperature cut-off (limit controller), automatically interrupting power if user-defined threshold is exceeded
• High-efficiency forced-air circulation system with adjustable rear air inlet/outlet ports to actively manage internal humidity and condensate removal during prolonged drying cycles
• High-temperature silicone door gasket ensuring reliable sealing up to 300 °C and extended service life
• Three adjustable stainless steel shelving tiers (standard configuration), compatible with custom load-bearing configurations upon request
• Optional inert gas purging interface with calibrated rotameter (0–10 L/min range), enabling controlled atmosphere operation for oxidation-sensitive samples

Sample Compatibility & Compliance

The DHG-9965A accommodates diverse sample types—including bulk powders, coated substrates, polymer specimens, electronic assemblies, biological media plates, and sterilization trays—without compromising thermal integrity. Its stainless steel chamber and absence of organic insulation materials eliminate outgassing risks, making it suitable for cleanroom-adjacent use and GLP-compliant environments. While not certified to ISO/IEC 17025 or FDA 21 CFR Part 11 out-of-the-box, the oven’s architecture supports audit-ready documentation when integrated with optional RS485 data logging (via Modbus RTU protocol) and external compliant software. All electrical components meet IEC 61000-6-3 (EMI) and IEC 61000-6-2 (immunity) requirements. The unit operates safely within ambient conditions of 5–40 °C and ≤80% RH (non-condensing).

Software & Data Management

Standard operation requires no external software; all parameters are configured via the onboard LCD interface. For traceability-critical applications, optional RS485 serial communication enables integration with SCADA platforms or custom LabVIEW/Python-based acquisition systems. When paired with the optional embedded thermal printer, the oven generates time-stamped hardcopy logs of temperature profiles, alarm events, and cycle completion status—supporting basic 21 CFR Part 11 compliance when combined with procedural controls (e.g., operator login protocols, change logs). Multi-segment programmable controllers (sold separately) extend functionality to ramp-soak-hold thermal profiles, facilitating standardized test methods such as ASTM D2240 (Shore hardness conditioning) or ISO 293 (thermoplastic compression molding preheating).

Applications

This oven serves as a core thermal processing tool across regulated and research-intensive sectors. In pharmaceutical QC labs, it supports residual solvent removal from active pharmaceutical ingredients (APIs) per USP , moisture content determination (following AOAC 950.46), and glassware drying prior to aseptic handling. Materials scientists utilize it for pre-conditioning composites before mechanical testing (ASTM D638), annealing metal coupons (ASTM E112), and curing thermoset resins. Electronics manufacturers employ it for PCB baking (IPC-CC-830B), conformal coating curing, and moisture mitigation prior to hermetic sealing. Food testing laboratories apply it for proximate analysis (AOAC 930.15), microbiological media preparation, and accelerated shelf-life studies under controlled thermal stress.

FAQ

What is the maximum recommended continuous operating temperature?
The DHG-9965A is rated for continuous operation up to 300 °C. Prolonged use above 280 °C may accelerate aging of the door seal and blower motor insulation; routine inspection is advised.
Can the oven be validated for IQ/OQ/PQ protocols?
Yes—its stable thermal performance, digital control architecture, and optional data export capabilities support formal qualification. We provide as-built drawings, calibration certificates for the reference sensor, and technical specifications required for vendor documentation.
Is the stainless steel chamber electropolished or passivated?
The interior uses standard mirror-finish SUS304 stainless steel. Electropolishing or citric acid passivation is available as a customization option for ultra-high-purity applications.
Does the oven support NIST-traceable temperature calibration?
The built-in PT100 sensor is factory-calibrated. Users may perform field verification using a NIST-traceable reference thermometer inserted through the standard 25 mm test port (optional accessory).
What maintenance intervals are recommended for the blower assembly?
Inspect the blower impeller and motor bearings every 6 months under continuous operation. Lubrication is sealed-for-life; replacement is recommended after 10,000 hours of cumulative runtime.