Tianfeng TF-FD-18S Benchtop Freeze Dryer with Heated Shelf

Overview

The Tianfeng TF-FD-18S is a benchtop, shelf-type freeze dryer engineered for precise, reproducible lyophilization of heat-sensitive biological and pharmaceutical samples in laboratory environments. It operates on the fundamental principle of sublimation—removing water from frozen materials under deep vacuum without passing through the liquid phase. This process preserves structural integrity, enzymatic activity, immunogenicity, and long-term stability of labile compounds such as monoclonal antibodies, plasmid DNA, viral vectors, cell lysates, and diagnostic reagents. Unlike conventional drying methods conducted above 0 °C—which induce denaturation, oxidation, or collapse—the TF-FD-18S maintains sample temperature below the eutectic point throughout primary drying and limits shelf heating to ≤60 °C during secondary drying, ensuring minimal thermal stress. Its integrated heated shelf enables controlled, programmable ramp-and-hold cycles critical for optimizing drying kinetics and final residual moisture content per ICH Q5C and USP <1211> guidelines.

Key Features

• Programmable Heated Shelf System: Four stainless steel shelves (Φ240 mm each) with independent electric heating and PID-controlled temperature regulation (±1 °C uniformity); supports pre-defined multi-step shelf temperature profiles for optimized primary and secondary drying.
• High-Efficiency Cascade Refrigeration: Air-cooled dual-stage compressor system achieves condenser temperatures below −60 °C, enabling efficient capture of both aqueous and moderately volatile solvents (e.g., acetone, ethanol) during lyophilization.
• Real-Time Process Monitoring: 7-inch capacitive touchscreen displays live shelf temperature, chamber pressure, condenser temperature, and time-based lyophilization curves; data export via USB supports audit-ready documentation.
• Robust Chamber Architecture: Fully welded 304 stainless steel drying chamber and condenser housing; transparent acrylic door with anti-fog coating for unobstructed visual observation of ice formation, sublimation front progression, and cake morphology.
• GLP-Ready Integration Options: Optional temperature data logger (21 CFR Part 11 compliant), co-crystallization point detection module, inert gas backfill valve (N₂ or Ar), and automated stoppering interface for vial-based applications.
• Automated Process Control: On-board logic supports automatic vacuum ramping, pressure control via adjustable bleed valve, and end-point detection based on pressure rise test (PRT) or temperature differentials between shelf and product.

Sample Compatibility & Compliance

The TF-FD-18S accommodates a broad spectrum of sample formats—including serum vials (10–50 mL), Petri dishes, scintillation vials, and custom trays—within its 0.18 m² shelf area. Its −60 °C condenser and 6 kg/24 h ice capacity support batch processing of up to 2 L of aqueous solution or equivalent biomass volume. The system meets mechanical and operational requirements referenced in ISO 22042:2021 (freeze-drying equipment performance testing) and aligns with core validation parameters outlined in EU Annex 15 and FDA Guidance for Industry: Sterile Drug Products Produced by Aseptic Processing. All wetted surfaces are electropolished 304 stainless steel, facilitating cleaning verification per ASTM E3079 and compatibility with common CIP agents. Vacuum integrity is verified to <15 Pa at no-load per ISO 13408-1.

Software & Data Management

Embedded firmware provides intuitive workflow navigation, real-time parameter logging at user-defined intervals (1–60 sec), and CSV-formatted data export for post-processing in MATLAB, Python, or commercial statistical platforms. Optional PC software enables remote monitoring, multi-unit fleet management, electronic signature authentication, and ALCOA+ compliant metadata tagging (author, timestamp, instrument ID, method version). Audit trails record all configuration changes, alarm events, and manual interventions—fully traceable for regulatory submissions. When paired with validated temperature probes (Class A PT100), the system satisfies data integrity expectations under 21 CFR Part 11 when deployed with appropriate access controls and backup protocols.

Applications

• Stabilization of therapeutic proteins, vaccines, and live-attenuated biologics for preclinical storage and stability studies
• Preparation of reference standards and calibration materials for QC laboratories (ISO/IEC 17025 accredited environments)
• Drying of microbial cultures, fungal spores, and tissue homogenates for long-term archiving in biobanks
• Processing of botanical extracts and nutraceutical formulations requiring retention of volatile terpenes and polyphenols
• Development of lyophilized rapid diagnostic assays (lateral flow, ELISA kits) where reconstitution time and signal consistency are critical
• Material science research involving porous scaffold fabrication, aerogel synthesis, and cryo-structured catalyst supports

FAQ

What is the maximum sample volume this unit can process per cycle?
The TF-FD-18S supports up to 2 liters of aqueous solution across four shelves, assuming typical loading density (5–10 mL per vial) and optimal cake thickness (≤10 mm). Actual throughput depends on solute concentration, freezing rate, and target residual moisture.
Does the system support validation protocols such as IQ/OQ/PQ?
Yes—Tianfeng provides factory-verified calibration certificates for pressure transducers, PT100 sensors, and vacuum gauges. Full qualification documentation packages (including URS, FDS, and test scripts) are available upon request for GMP-regulated installations.
Can organic solvents be safely lyophilized in this model?
The −60 °C condenser effectively traps water and low-boiling solvents (e.g., methanol, acetonitrile). For high-volatility solvents (e.g., chloroform, ether), use requires additional solvent trap accessories and strict adherence to explosion-proof handling procedures.
Is shelf temperature uniformity verified across all positions?
Yes—temperature mapping per ASTM F2697 confirms ±1 °C deviation across shelf surface under loaded conditions at steady state, validated using nine-point thermocouple array per ISO 13408-1 Annex B.
What maintenance intervals are recommended for sustained performance?
Oil change every 2,000 operating hours; refrigerant leak check annually; vacuum pump oil replacement every 500 hours; condenser coil cleaning quarterly in non-AC environments. Full service manuals and OEM spare parts are supplied with each unit.