Jianhu JH Series Vacuum Drying Oven

Overview

The Jianhu JH Series Vacuum Drying Oven is an engineered solution for thermal processing under reduced-pressure environments. Designed for laboratories and quality control facilities requiring oxygen-sensitive, low-temperature dehydration, solvent removal, or moisture analysis, this series operates on the principle of vacuum-assisted heat transfer—reducing boiling points of volatile components while minimizing oxidative degradation. Unlike conventional convection ovens, the JH Series eliminates reliance on air-mediated conduction; instead, it leverages direct conductive heating through a robust stainless steel or cold-rolled steel chamber wall, combined with optimized internal airflow distribution and high-efficiency insulation. This architecture significantly reduces thermal inertia, enabling up to 50% shorter heating ramp times compared to legacy vacuum oven designs—without compromising temperature stability or spatial uniformity across the working volume.

Key Features

• Microprocessor-based digital temperature controller with programmable timer function for repeatable, unattended operation
• Dual-layer tempered glass observation door with reinforced anti-shatter properties and adjustable sealing tension for consistent vacuum integrity
• Integrated inert gas inlet port (e.g., N₂ or Ar) supporting controlled-atmosphere drying protocols per ASTM E1228 or ISO 11358
• High-reliability silicone gasket system, molded as a single-piece seal around the door perimeter, rated for continuous operation at ≤133 Pa
• Chamber construction in electropolished stainless steel (standard on JH-6052, JH-6210, JH-6250) or powder-coated cold-rolled steel (JH-6050, JH-6051), ensuring corrosion resistance and cleanability
• Modular shelf configuration (1–3 removable stainless steel trays) with reinforced support brackets for load distribution up to 20 kg per shelf
• Front-access vacuum connection port compatible with standard KF-16 or ISO-KF flange interfaces for seamless integration with external vacuum pumps

Sample Compatibility & Compliance

The JH Series accommodates a broad range of sample formats—including Petri dishes, weighing boats, glass vials, ceramic crucibles, and polymer film substrates—within its rectangular chamber geometry optimized for volumetric efficiency. Its ability to maintain stable vacuum and precise temperature profiles supports applications aligned with pharmacopeial methods (e.g., USP <<621> residual solvents, EP 2.2.32 loss on drying) and materials testing standards (e.g., ISO 293, ASTM D6984). The absence of atmospheric oxygen during drying prevents oxidation of thermally labile compounds such as pharmaceutical intermediates, lithium battery cathode precursors, and organic semiconductors. All units are CE-marked for safety compliance and designed to meet IEC 61010-1 requirements for laboratory electrical equipment. Optional programmable controllers support audit-trail logging required under FDA 21 CFR Part 11 when deployed in GLP/GMP-regulated environments.

Software & Data Management

While the base model features a stand-alone microcontroller interface with LED display and manual setpoint input, the optional intelligent LCD controller (JH-PRO-TC) adds full data logging capability: real-time temperature/vacuum trend recording at user-defined intervals (1 s to 60 min), CSV export via USB, and password-protected parameter lockdown. The controller firmware complies with IEEE 11073-10201 for medical device interoperability frameworks and includes configurable alarm thresholds (e.g., over-temperature, vacuum breach, door open detection). All logged data include timestamp, operator ID, and environmental metadata—enabling traceability in regulated workflows. No cloud connectivity or proprietary software installation is required; data files are human-readable and compatible with standard LIMS platforms.

Applications

• Residual solvent removal from APIs and excipients prior to lyophilization or tablet compression
• Drying of hygroscopic reference standards used in calibration laboratories (ISO/IEC 17025)
• Pre-treatment of electrodes and separators for electrochemical cell assembly
• Moisture content determination in polymers, ceramics, and composites per ISO 3747
• Stabilization of nanomaterial dispersions without agglomeration induced by convective airflow
• Low-temperature annealing of thin-film photovoltaic layers under inert purge
• Storage of moisture-sensitive reagents and calibration gases in static vacuum conditions

FAQ

What vacuum level can the JH Series achieve, and how is it verified?
The system achieves ≤133 Pa (1 Torr) using a standard two-stage rotary vane pump. Vacuum performance is validated using a calibrated Pirani gauge mounted directly on the chamber port, with verification documented in the factory test report.
Is the chamber pressure monitored continuously during operation?
Base models do not include integrated pressure monitoring; however, the optional JH-VAC-MON module adds analog output (0–10 V) for external vacuum gauge integration and real-time pressure logging.
Can the oven be used for outgassing of ultra-high vacuum components?
While suitable for pre-bakeout conditioning of non-critical UHV parts (e.g., feedthroughs, viewports), it is not rated for bakeout temperatures above 250 °C or for achieving pressures below 10⁻² Pa—applications requiring dedicated UHV烘烤 systems.
Are replacement gaskets and shelves available as spare parts?
Yes. All consumables—including silicone door gaskets (part #JH-GSK-01), stainless steel shelves (JH-SHLF-02), and water traps (JH-WTR-03)—are stocked and shipped globally with OEM documentation.
Does the unit comply with electromagnetic compatibility (EMC) directives?
Yes. Each unit undergoes conducted and radiated emissions testing per EN 61326-1 and carries the CE mark indicating conformity with EU EMC Directive 2014/30/EU.