Shanghai Youyi DHG-9073A Forced-Air Constant-Temperature Drying Oven

Overview

The Shanghai Youyi DHG-9073A Forced-Air Constant-Temperature Drying Oven is an engineered solution for precise thermal processing in research laboratories, quality control environments, and industrial R&D settings. Designed according to GB/T 30435–2013 (the Chinese national standard for electric heating drying ovens), this model employs a forced-convection architecture—utilizing a rear-mounted centrifugal blower and optimized air ducting—to ensure uniform heat distribution across the entire working chamber. The oven operates on resistive electric heating elements with PID-controlled thermal regulation, enabling stable setpoint maintenance within ±1°C fluctuation and ±2.5% uniformity (measured at 100°C under no-load conditions). Its 70 L internal volume (450 × 400 × 450 mm) supports medium-scale batch processing of samples requiring controlled dehydration, sterilization, curing, or thermal conditioning—without compromising reproducibility or traceability.

Key Features

• Microprocessor-based intelligent temperature controller with LCD menu-driven interface: displays real-time chamber temperature, setpoint, elapsed time, and remaining hold duration simultaneously.
• Robust chamber construction: mirror-finish SUS304 stainless steel interior with corrosion-resistant cold-rolled steel exterior coated via electrostatic powder spraying.
• Double-layer tempered glass observation window with silicone gasket seal—enabling non-intrusive visual monitoring while maintaining thermal integrity and minimizing heat loss.
• High-efficiency horizontal airflow system with adjustable stainless steel shelves (2 standard trays included; height positions fully customizable).
• Integrated safety architecture: independent over-temperature cut-off circuit (optional), power-failure data retention with auto-restart functionality, and audible/visual alarm activation upon deviation beyond user-defined thresholds.
• Rear-mounted automatic air intake/exhaust ports with passive moisture venting—eliminating manual damper adjustment and reducing condensation risk during prolonged low-temperature drying cycles.
• High-temperature silicone door seal rated for continuous operation up to 280°C, ensuring long service life and consistent sealing performance across thermal cycles.

Sample Compatibility & Compliance

The DHG-9073A accommodates a broad spectrum of sample types—including glassware, metal parts, polymer substrates, biological specimens (post-fixation), pharmaceutical excipients, ceramic precursors, and electronic components—provided they are thermally stable within the operational range (RT+20°C to 280°C). Its chamber geometry and airflow design minimize thermal stratification, supporting applications aligned with ISO 17025-accredited testing protocols where temperature homogeneity is critical. While not inherently compliant with FDA 21 CFR Part 11 out-of-the-box, the optional RS485 interface enables integration into validated data acquisition systems when paired with compliant software and audit-trail-enabled controllers. The unit meets electromagnetic compatibility (EMC) requirements per GB/T 18268.1–2010 and electrical safety standards per GB 4793.1–2007.

Software & Data Management

The base configuration includes local parameter logging via the onboard controller, retaining up to 10 programmable segments (with ramp/soak profiles) and cycle history for the last 10 runs. Optional add-ons expand traceability: the RS485 communication port supports Modbus RTU protocol for bidirectional data exchange with SCADA or LIMS platforms; the embedded thermal printer provides hard-copy records of temperature profiles and event timestamps; and the multi-segment programmable controller (optional accessory) allows GLP-compliant scheduling of complex thermal sequences—including pre-heating, dwell, cooling ramp, and purge phases. All digital outputs conform to standard CSV formatting for post-processing in Excel or statistical analysis tools.

Applications

This drying oven serves as a foundational thermal platform across regulated and non-regulated domains. In pharmaceutical QC labs, it supports residual solvent removal per USP , moisture content determination (e.g., loss-on-drying per USP ), and stability-indicating assay preparation. In materials science, it facilitates polymer cross-linking, catalyst calcination, and thin-film annealing. Academic users employ it for botanical sample desiccation, microbiological media preparation, and calibration standard conditioning. Electronics manufacturers rely on its thermal consistency for solder paste drying and conformal coating curing. Additionally, its inert gas inlet option (with calibrated float flowmeter) enables oxygen-sensitive processes such as lithium battery electrode drying or passivation of reactive metal powders.

FAQ

What is the maximum operating temperature of the DHG-9073A?
The unit is rated for continuous operation from ambient +20°C up to 280°C.
Is the temperature uniformity verified per ISO or ASTM standards?
Uniformity testing follows GB/T 30435–2013 methodology; equivalent verification per ASTM E145–22 Class II can be performed using calibrated PT100 probes at nine designated points.
Can the oven be integrated into a central lab monitoring system?
Yes—via the optional RS485 interface and compatible Modbus-enabled supervisory software.
Does the unit support GMP/GLP documentation requirements?
With the optional printer and programmable controller, it supports ALCOA+ principles for attributable, legible, contemporaneous, original, accurate, complete, consistent, enduring, and available records.
Are custom chamber configurations or non-standard voltages available?
Shanghai Youyi offers OEM/ODM services—including voltage adaptation (e.g., 110 V / 60 Hz), extended temperature ranges, explosion-proof variants, and specialized shelving layouts—subject to engineering review and MOQ agreement.