HJ YB-1A Vacuum Constant-Temperature Drying Oven
| Brand | HJ Purification |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | YB-1A |
| Instrument Type | Vacuum Oven |
| Vacuum Range | 0 to −0.1 MPa |
| Temperature Control Range | 30–150 °C |
| Temperature Uniformity | ±2 °C at 0 °C (vacuum chamber) |
| Chamber Dimensions | Ø220 mm × 260 mm (D × H) |
| External Dimensions | 350 × 350 × 240 mm (W × D × H) |
| Power Supply | 220 V / 50 Hz |
| Rated Power | 450 W |
| Vacuum Retention | ≥98% of achieved vacuum level maintained for ≥24 h after pump shutdown |
| Heating Method | Annular circumferential heating element integrated into chamber wall |
Overview
The HJ YB-1A Vacuum Constant-Temperature Drying Oven is an engineered solution for moisture-sensitive, thermolabile, or oxidation-prone sample processing in research laboratories, quality control environments, and small-scale production facilities. It operates on the principle of vacuum-assisted thermal desorption: by reducing ambient pressure inside the sealed chamber, the boiling point of residual solvents and water is significantly lowered—enabling effective drying at substantially reduced temperatures compared to atmospheric ovens. This mitigates thermal degradation, prevents oxidation, and preserves structural integrity of polymers, pharmaceutical intermediates, biological extracts, and precision electronic components. The unit integrates a robust stainless-steel vacuum chamber with annular heating elements embedded in the chamber wall, delivering radial thermal symmetry and minimizing axial temperature gradients. Its design conforms to fundamental requirements of ISO 17025-compliant calibration workflows and supports traceable process documentation under GLP and GMP-aligned laboratory practices.
Key Features
- Top-hinged door configuration with no mechanical latching required—enables rapid access and real-time visual monitoring of samples without vacuum loss interruption.
- Integrated micro-adjustable vacuum release valve with laminar-flow needle design—permits controlled, low-velocity air reintroduction to prevent sample displacement or particle resuspension during venting.
- Dedicated vacuum port with interlocked solenoid valve—automatically isolates the chamber from the external vacuum pump upon pump shutdown, eliminating backstreaming of pump oil vapor into the drying environment.
- Annular heating architecture—uniform heat distribution across the entire inner surface of the cylindrical chamber ensures ≤±2 °C temperature deviation at 0 °C reference point (measured per ASTM E2203 practice for oven uniformity mapping).
- High-integrity vacuum retention—achieved via dual O-ring sealing system and electropolished chamber interior; maintains ≥98% of target vacuum level for over 24 hours post-pump disengagement, verified per ISO 2859-1 sampling inspection protocol.
Sample Compatibility & Compliance
The YB-1A accommodates standard glassware (e.g., weighing bottles, Petri dishes, and quartz crucibles), polymer substrates, ceramic filters, and pre-weighed analytical samples up to Ø220 mm diameter and 260 mm height. Its vacuum-compatible construction avoids outgassing contaminants, making it suitable for applications requiring low-particulate and low-volatile organic compound (VOC) environments. The unit complies with IEC 61010-1 safety standards for electrical equipment used in laboratory settings. While not certified for Class I Division 1 hazardous locations, its non-sparking heater design and grounded chassis meet general-purpose electrical safety expectations in ISO/IEC 17025-accredited labs. Documentation support includes factory calibration certificate (temperature sensor and vacuum gauge), traceable to NIM (National Institute of Metrology, China) standards.
Software & Data Management
The YB-1A operates via analog-digital hybrid control: a PID-based digital temperature controller with manual setpoint adjustment and real-time LED display of chamber temperature and vacuum level (in MPa). No embedded software or network interface is included—intentionally designed for simplicity, reliability, and minimal validation burden in regulated environments. Users may integrate external data loggers (e.g., compliant with FDA 21 CFR Part 11 requirements) via 4–20 mA or 0–5 V analog outputs (optional add-on). All operational parameters—including ramp rate, dwell time, and final vacuum setpoint—are manually recorded in lab notebooks or LIMS-integrated forms, supporting audit-ready batch records in pharmaceutical QC and materials science workflows.
Applications
- Drying hygroscopic reference standards prior to gravimetric analysis (ASTM E122, USP <1251>).
- Dehydrating lyophilized protein formulations without denaturation.
- Removing residual solvents from thin-film coatings in semiconductor R&D.
- Conditioning filter membranes for particulate matter analysis (ISO 16268).
- Stabilizing moisture-sensitive catalysts and MOFs prior to BET surface area measurement.
- Pre-treating geological core samples for XRD and SEM analysis under inert conditions.
FAQ
What vacuum pump compatibility does the YB-1A support?
The unit features a standard KF-16 (NW16) vacuum flange and is compatible with two-stage rotary vane pumps (≥2 m³/h pumping speed) and dry scroll pumps meeting ISO 8573-1 Class 2 purity requirements.
Is temperature calibration performed at multiple points within the chamber?
Factory calibration is conducted at three spatially distributed points (center, upper third, lower third) using NIST-traceable PT100 probes; users may perform periodic verification per ASTM E2203 Annex A2.
Can the YB-1A be used for inert-gas purging?
Yes—by replacing the vacuum line with a regulated nitrogen or argon supply and adjusting the micro-valve, the chamber can be purged and held under positive inert atmosphere (requires optional gas inlet adapter).
