Yiheng BPZ-LC/LCB Digital Vacuum Drying Oven
| Brand | Yiheng |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | BPZ-LC / BPZ-LCB |
| Instrument Type | Vacuum Oven |
| Temperature Range | RT+10°C to 200°C |
| Temperature Uniformity | ±1°C |
| Temperature Resolution | 0.1°C |
| Chamber Material | Stainless Steel (304) |
| Heating Method | Forced-Air Circulation |
| Vacuum Range | 10 Pa to 10⁵ Pa |
| Control Accuracy (Vacuum) | ±1% of setpoint |
| Programmable Stages | Up to 15 segments |
| Segment Duration | 1–9999 minutes per stage |
| Ramp Rate Control | Available (BPZ-LC only, via slope-mode programming) |
| Vacuum Cycling Capability | Up to 99 programmable cycles, with user-defined upper/lower vacuum setpoints |
Overview
The Yiheng BPZ-LC/LCB Digital Vacuum Drying Oven is an engineered solution for thermal processing under reduced-pressure environments, designed specifically for laboratories requiring precise moisture removal, solvent recovery, heat-sensitive sample stabilization, and oxygen-free thermal treatment. Operating on the principle of lowering the boiling point of volatile components through controlled vacuum application—combined with uniform forced-air convection heating—the system enables efficient, reproducible drying without thermal degradation. Unlike atmospheric ovens, this vacuum drying platform eliminates oxidation risks during thermal exposure, making it essential for pharmaceutical active ingredient drying, polymer degassing, electronic component moisture removal, and analytical sample preparation where compositional integrity must be preserved.
Key Features
- Digital vacuum control architecture utilizing silicon piezoresistive pressure sensors, delivering stable, drift-free measurement across the full 10 Pa–10⁵ Pa range with ±1% setpoint accuracy.
- Microprocessor-based dual-loop PID temperature controller with 0.1°C resolution and ±1°C uniformity across the working chamber (RT+10°C to 200°C).
- 15-segment programmable logic supporting both standard step-and-hold and slope-mode ramping (BPZ-LC model), enabling precise control over heating/cooling rates and dwell times.
- Reinforced double-layer tempered glass door with adjustable sealing tension and integrated silicone gasket, rated for sustained operation at ≤10 Pa.
- Stainless steel (AISI 304) interior chamber with seamless welds and rounded corners for corrosion resistance, cleanability, and compliance with GLP laboratory hygiene standards.
- Vacuum cycling function: users define upper and lower vacuum thresholds (e.g., 50 Pa–900 Pa) and cycle count (up to 99), automatically expelling residual moisture in iterative low-pressure pulses—reducing total drying time by >50% versus static-vacuum methods.
Sample Compatibility & Compliance
The BPZ-LC/LCB accommodates a broad spectrum of sample types—including powders, granules, thin films, coated substrates, and packaged components—without risk of surface oxidation or structural collapse. Its inert-gas purging port supports nitrogen or argon backfilling prior to vacuum initiation, critical for pyrophoric materials or moisture-sensitive APIs. The system meets structural and operational requirements referenced in ISO 14644-1 (cleanroom-compatible construction), ASTM E145 (standard specification for gravity-convection and forced-circulation ovens), and supports audit-ready documentation when integrated into FDA 21 CFR Part 11–compliant workflows via optional data logging modules.
Software & Data Management
While the base unit operates via intuitive front-panel membrane interface, optional RS485/Modbus RTU connectivity enables integration with centralized lab management systems (LIMS) or SCADA platforms. All temperature and vacuum setpoints, real-time process values, alarm events, and cycle logs are timestamped and retainable for ≥30 days onboard. When paired with Yiheng’s optional PC-based control software (v3.2+), users gain exportable CSV reports, trend visualization, and electronic signature support aligned with ALCOA+ data integrity principles.
Applications
- Pharmaceutical: Residual solvent removal from lyophilized intermediates; moisture content reduction in excipients prior to tablet compression.
- Materials Science: Degassing of epoxy resins and silicone elastomers prior to curing; outgassing characterization of thin-film coatings.
- Electronics: Pre-bake of PCB assemblies and semiconductor packaging substrates to prevent popcorning during reflow soldering.
- Academic Research: Thermal gravimetric analysis (TGA) sample conditioning; catalyst support drying under inert atmosphere.
- Quality Control Labs: Standardized drying protocols for moisture determination per USP and ISO 554.
FAQ
What vacuum level can the BPZ-LC/LCB achieve, and how is it maintained?
The oven achieves and sustains vacuum levels from 10 Pa to 10⁵ Pa using a built-in digital vacuum regulator and feedback-controlled solenoid valve. Pressure stability is ensured by a silicon-based resistive sensor unaffected by gas composition or flow turbulence.
Does the system support automated vacuum cycling, and how many cycles can be programmed?
Yes—up to 99 fully customizable vacuum cycles can be defined, each with independent upper/lower pressure bounds and dwell durations, facilitating progressive moisture extraction.
Is the temperature ramp rate programmable?
The BPZ-LC model supports slope-mode programming (“Temp₁ → Temp₂ in X minutes”), enabling controlled heating/cooling rates; the BPZ-LCB supports only step-and-hold profiles.
Can inert gas be introduced during operation?
Yes—a dedicated purge port allows manual or automated inert gas (N₂, Ar) injection before vacuum initiation or during venting phases.
What regulatory documentation is available for validation purposes?
Factory calibration certificates (temperature and vacuum), IQ/OQ protocol templates, and material compliance declarations (RoHS, REACH) are provided upon request.
