Yiheng BPZ Series Digital Vacuum Drying Oven

Overview

The Yiheng BPZ Series Digital Vacuum Drying Oven is an engineered solution for controlled thermal processing under reduced-pressure conditions. It operates on the principle of vacuum-assisted moisture removal—lowering the boiling point of solvents and volatile compounds while minimizing thermal degradation, oxidation, and polymerization risks. Unlike conventional convection ovens, this system integrates dual-loop digital control over both temperature and vacuum pressure, enabling precise decoupling of thermal energy input and vapor-phase evacuation. The chamber’s sealed stainless-steel construction, combined with a high-integrity silicone gasket and adjustable door tension mechanism, ensures long-term vacuum integrity down to 133 Pa. Its design aligns with standard laboratory workflows requiring inert-atmosphere drying (e.g., nitrogen or argon purging), residual solvent removal in pharmaceutical intermediates, or moisture-sensitive material stabilization prior to analytical characterization.

Key Features

• Dual digital control system: independent PID regulation of chamber temperature (RT+10°C to 200°C) and vacuum pressure (10–10⁵ Pa), with ±1% vacuum setpoint accuracy via silicon piezoresistive sensor feedback
• 15-segment programmable controller supporting both step-and-hold and ramp-and-soak profiles; each segment configurable for duration (1–9999 minutes) and target temperature
• Vacuum cycling function: user-defined upper/lower vacuum limits (e.g., 50–900 Pa) executed over up to 99 repeated cycles to accelerate desorption kinetics without overheating samples
• Double-layer tempered glass observation window with anti-scratch coating—enables real-time visual monitoring while maintaining vacuum seal integrity
• Forced-air circulation heating system with rear-mounted fan and baffle-guided airflow distribution, ensuring ±1°C temperature uniformity across working volume
• Chamber constructed from electropolished AISI 304 stainless steel; interior corners fully radiused for cleanability and compliance with ISO 14644-1 Class 8 cleanroom maintenance protocols

Sample Compatibility & Compliance

The BPZ series accommodates a broad range of sample types—including hygroscopic powders, thin-film coatings, ceramic green bodies, lyophilized biologics, and solvent-cast polymer films—without risk of surface oxidation or thermal decomposition. Its ability to operate under inert gas purge (via dedicated inlet/outlet ports) supports applications governed by USP , ISO 10993-12, and ASTM E145-22. The system’s vacuum stability and repeatability meet requirements for GLP documentation traceability when paired with external data loggers. While not inherently 21 CFR Part 11 compliant, its analog/digital I/O interface allows integration with validated LIMS or SCADA platforms for electronic record retention and operator audit trails.

Software & Data Management

The front-panel touchscreen interface provides local programming, real-time trend display (temperature vs. time, vacuum vs. time), and event logging (door open/close, alarm triggers, cycle completion). All parameters—including vacuum setpoints, temperature ramps, and cycle counts—are stored in non-volatile memory with timestamped entries. Optional RS485 Modbus RTU output enables connection to centralized lab automation systems. Data export is supported via USB flash drive (CSV format), facilitating post-process analysis in MATLAB, JMP, or Python-based QA/QC pipelines. Firmware updates are performed offline using signed binary packages to ensure configuration integrity.

Applications

• Residual solvent removal from active pharmaceutical ingredients (APIs) per ICH Q5C guidelines
• Drying of nanomaterial dispersions prior to BET surface area analysis
• Pre-conditioning of calibration standards for gravimetric moisture analyzers (ASTM D4457)
• Stabilization of humidity-sensitive reference materials used in environmental test chambers
• Low-temperature dehydration of enzyme immobilization matrices without denaturation
• Outgassing treatment of optical components prior to thin-film deposition

FAQ

What vacuum level can the BPZ achieve, and how is it maintained?
The system achieves a base vacuum of ≤133 Pa using a two-stage rotary vane pump (pump not included); sustained vacuum stability is ensured by a calibrated silicon pressure transducer and closed-loop proportional valve actuation.
Does the oven support inert gas purging during operation?
Yes—dual 6 mm BSP threaded ports allow continuous or batch-mode introduction of nitrogen, argon, or other inert gases while maintaining vacuum setpoint control.
Can vacuum and temperature programs run simultaneously and independently?
Yes—the controller executes synchronized but decoupled profiles: vacuum cycling occurs within defined temperature bands, preventing condensation or thermal shock during pressure transitions.
Is validation documentation available for IQ/OQ/PQ protocols?
Factory-supplied test certificates cover temperature uniformity mapping (per ASTM E2203), vacuum leak rate verification (<0.5 Pa/min at 100 Pa), and sensor calibration traceability to NIM (China National Institute of Metrology).
How is cleaning and maintenance performed in regulated environments?
The seamless stainless-steel chamber and removable shelf supports comply with ASME BPE surface finish standards (Ra ≤ 0.8 µm); all gaskets are FDA-listed silicone, replaceable without tools.