Shanghai LabTech DZF-2B Stainless Steel Vacuum Drying Oven

Overview

The Shanghai LabTech DZF-2B Stainless Steel Vacuum Drying Oven is a precision-engineered thermal processing instrument designed for controlled dehydration, solvent removal, moisture analysis, and low-temperature heat treatment under reduced pressure. Operating on the principle of vacuum-assisted evaporation—where lowering ambient pressure reduces the boiling point of volatile components—the DZF-2B enables gentle, uniform drying of thermally sensitive, hygroscopic, or oxidation-prone samples without thermal degradation. Its fully welded 304 stainless steel chamber provides superior corrosion resistance, non-reactivity, and long-term dimensional stability compared to painted cold-rolled steel alternatives. The unit complies with fundamental safety and performance expectations outlined in IEC 61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and supports GLP-aligned workflows through stable temperature control and mechanical vacuum interface readiness.

Key Features

• Robust 304 stainless steel interior chamber (415 × 345 × 370 mm) with seamless welds and passivated surface finish—resistant to acids, alkalis, and repeated cleaning agents.
• Intelligent PID-based digital temperature controller with ±1.0 °C accuracy across 50–250 °C range; adjustable ramp-soak profiles via front-panel interface.
• Tempered safety glass observation door with dual-layer construction—meets EN 12150-1 impact resistance standards and allows real-time visual monitoring without vacuum break.
• Adjustable door compression mechanism paired with one-piece molded silicone gasket—achieves and maintains ≤10 Pa vacuum when used with compatible external pump systems (e.g., SHZ-D(III) or similar two-stage rotary vane pumps).
• Over-temperature protection circuit and independent mechanical thermostat safeguard against controller failure; grounded chassis and EMI-filtered power input ensure laboratory-grade electrical safety.

Sample Compatibility & Compliance

The DZF-2B accommodates diverse sample formats including glass Petri dishes, aluminum weighing boats, ceramic crucibles, polymer films, pharmaceutical powders, biological tissue sections, and pre-weighed filter papers. Its inert stainless steel chamber prevents catalytic side reactions during drying of organometallic compounds or peroxide-forming solvents. While the oven itself does not include an integrated vacuum pump or drying flask assembly (as seen in DZF-3B configurations), its rear-mounted vacuum port (KF16 or ISO-KF25 flange) interfaces directly with standard laboratory vacuum manifolds. For regulated environments, the system supports traceable calibration using NIST-traceable PT100 probes and aligns with ASTM E145–22 (Standard Specification for Gravity-Convection and Forced-Ventilation Ovens) for thermal uniformity validation protocols. It is routinely deployed in QC labs adhering to USP , ISO 5725, and internal SOPs governing loss-on-drying (LOD) assays.

Software & Data Management

The DZF-2B operates as a standalone instrument with local control only—no embedded software, USB ports, or network connectivity. This architecture minimizes cybersecurity exposure and eliminates firmware update dependencies, enhancing operational reliability in GxP-regulated settings where change control documentation must remain minimal. Temperature setpoints, dwell times, and alarm thresholds are configured manually via push-button interface with LED display. For audit-ready data capture, users integrate external chart recorders or data loggers (e.g., Omega OM-DAQPRO-5300 series) connected to the optional RTD output terminal. All configuration changes are non-volatile and retained after power cycling. No FDA 21 CFR Part 11 functionality is provided—consistent with Class I laboratory equipment classification per ISO 13485 and EU MDR Annex VIII.

Applications

• Moisture content determination in APIs, excipients, and herbal extracts per USP and Ph. Eur. 2.2.32.
• Drying of lithium-ion battery electrode coatings prior to SEM cross-sectioning or BET surface area analysis.
• Dehydration of silica gels, molecular sieves, and catalyst supports without sintering or pore collapse.
• Pre-treatment of optical substrates and MEMS wafers prior to thin-film deposition to eliminate adsorbed water layers.
• Stabilization of calibration standards (e.g., potassium hydrogen phthalate, sodium chloride) in metrology laboratories.

FAQ

Does the DZF-2B include a built-in vacuum pump?

No—the DZF-2B requires an externally connected vacuum pump. It features a KF16 vacuum port compatible with standard rotary vane or diaphragm pumps.
What vacuum level can be achieved with recommended pump configurations?

When paired with a two-stage oil-sealed rotary vane pump (e.g., ultimate pressure ≤5 Pa), typical operating vacuum ranges from 10–100 Pa depending on chamber load and seal integrity.
Is the stainless steel chamber electropolished?

No—the interior uses mechanically polished 304 stainless steel (Ra ≤0.8 µm), sufficient for routine lab use but not certified for ultra-high-purity semiconductor applications.
Can the DZF-2B be used for sterilization?

It is not validated for microbial lethality. While vacuum drying removes water, it does not meet ISO 17665 or EN 554 requirements for steam sterilization cycles.
What maintenance is required for long-term reliability?

Annual inspection of door gasket elasticity, verification of temperature sensor drift using calibrated reference thermometers, and cleaning of heating element fins with non-abrasive stainless steel cleaner.