The Great Wall BHK-C30 Stainless Steel 30-Port Laboratory Glassware Drying Oven
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | BHK-C30 |
| Power | 800 W |
| Voltage/Frequency | 220 V / 50 Hz |
| Drying Tube Length | 170 mm (standard), customizable |
| Number of Drying Ports | 30 |
| Operating Temperature Range | 40–120 °C |
| Temperature Stability | ±2 °C |
| Outer Dimensions | Ø400 × 620 mm |
| Net Weight | 30 kg |
Overview
The Great Wall BHK-C30 is a benchtop, forced-air laboratory drying oven engineered specifically for post-washing thermal conditioning of glassware in analytical, quality control, and research laboratories. It operates on the principle of convective heat transfer via precisely directed, low-turbulence airflow through individually adjustable stainless steel drying tubes. Unlike ambient-air or cabinet-style dryers, the BHK-C30 delivers uniform, controllable heating across all 30 ports—minimizing residual moisture film formation and eliminating water spotting on volumetric flasks, pipettes, burettes, condensers, and other precision borosilicate glass apparatus. Its design prioritizes thermal consistency, mechanical durability, and operational safety under continuous use in ISO/IEC 17025-accredited environments.
Key Features
- 30-port configuration with individually aligned 304 stainless steel drying tubes—resistant to corrosion, thermal cycling, and repeated mechanical handling.
- Programmable temperature control (40–120 °C) with ±2 °C stability across full load, verified per ASTM E220–22 calibration guidelines.
- 800 W high-efficiency heating element integrated with axial fan assembly, ensuring rapid thermal equilibration (<15 min to reach 100 °C from ambient).
- Cylindrical housing constructed entirely from 304 stainless steel (C-type variant), offering superior resistance to chemical splashes, humidity, and cleaning agents compared to powder-coated carbon steel alternatives.
- Modular tube geometry: standard tube length is 170 mm; custom lengths (e.g., 200 mm, 250 mm) available upon specification to accommodate tall or tapered glassware such as Kjeldahl flasks or Soxhlet thimbles.
- Front-access service panel enables tool-free heater/fan maintenance—reducing mean time to repair (MTTR) and supporting GLP-compliant preventive maintenance logs.
Sample Compatibility & Compliance
The BHK-C30 accommodates standard laboratory glassware with outer diameters up to 45 mm, including but not limited to: Class A volumetric flasks (10–1000 mL), graduated cylinders, conical flasks, centrifuge tubes (15–50 mL), and air-jacketed condensers. Each port accepts vertical insertion without clamping, relying on gravity-assisted airflow alignment. The unit complies with IEC 61010-1:2010 for electrical safety in laboratory equipment and meets EN 60529 IP20 ingress protection requirements. While not certified for hazardous location use, its grounded stainless steel chassis and thermal cut-off fuse (130 °C) satisfy general-purpose lab safety protocols under OSHA 1910.1200 and EU Directive 2014/35/EU.
Software & Data Management
The BHK-C30 is a manually operated analog instrument with no embedded microcontroller or digital interface. Temperature setpoint adjustment is performed via calibrated rotary potentiometer; real-time indication is provided by a Class II bimetallic dial thermometer (±1.5 °C accuracy). As a non-data-logging device, it does not incorporate audit trail, user authentication, or electronic record functionality. However, its passive architecture ensures full compatibility with 21 CFR Part 11–compliant lab information management systems (LIMS) when paired with external temperature validation loggers (e.g., Vaisala viewLinc or Omega OM-CP-HITEMP140) for IQ/OQ/PQ documentation during GMP facility qualification.
Applications
- Routine drying of cleaned glassware prior to volumetric analysis (e.g., titration, gravimetric assay, standard solution preparation) where trace moisture interference must be eliminated.
- Pre-conditioning of sample containers for residual solvent testing (e.g., ICH Q3C compliance), minimizing adsorbed water that could skew headspace GC results.
- Post-rinse thermal stabilization of HPLC vials and autosampler trays to prevent condensation-induced contamination in trace-level LC-MS workflows.
- Drying of sterilized microbiological media vessels (e.g., Duran bottles, Fernbach flasks) in non-aseptic prep areas where autoclave-to-use workflow efficiency is critical.
- Supporting ISO 8573-3 compressed air purity verification by drying sampling traps and impingers used in particulate and oil aerosol collection.
FAQ
Is the BHK-C30 suitable for drying plastic or PTFE labware?
No. The maximum operating temperature (120 °C) exceeds the softening point of most polypropylene, polycarbonate, and fluoropolymer components. Only borosilicate glass, quartz, and 304/316 stainless steel fixtures are recommended.
Can temperature calibration be performed in-house?
Yes. Calibration is traceable to NIST via reference thermometers (e.g., Fluke 1523 with 5615 probe). Users should perform three-point verification (40 °C, 80 °C, 120 °C) annually or after physical impact, per ISO/IEC 17025 Clause 6.5.2.
Does the unit include overtemperature protection?
Yes. A redundant bimetallic thermal cutoff fuse (rated 130 °C) interrupts power independently of the main thermostat, satisfying EN 60529 fail-safe requirements.
What maintenance is required for long-term reliability?
Monthly inspection of fan inlet grille for dust accumulation; quarterly verification of tube alignment and heater surface oxidation; annual replacement of the main thermostat if drift exceeds ±3 °C across the range.
Is technical documentation available in English?
Yes. The manufacturer provides English-language operation manual, parts schematic, and CE Declaration of Conformity upon request—supporting international installation and regulatory review processes.
