Tianfeng TF-SFD-5 Benchtop Pilot-Scale Freeze Dryer with Stoppering Function

Overview

The Tianfeng TF-SFD-5 is a benchtop pilot-scale freeze dryer engineered for reproducible, scalable lyophilization of thermolabile biologicals, pharmaceuticals, and functional food matrices under controlled low-temperature vacuum conditions. It operates on the fundamental principle of sublimation—where ice transitions directly from solid to vapor phase without passing through liquid—enabled by simultaneous application of deep vacuum (≤5 Pa) and precise shelf temperature control (−50 °C to +80 °C). Unlike batch tray dryers or laboratory-scale units, the TF-SFD-5 integrates an in-situ pre-freezing capability with automated stoppering functionality, enabling full process continuity from freezing through primary and secondary drying to final container closure—all within a single, sealed chamber. Its 0.5 m² effective shelf area and 8 kg/24 h ice condensation capacity support consistent scale-up from R&D to early-phase clinical manufacturing, making it suitable for GMP-aligned process development per ICH Q5C and ISO 22033 guidelines.

Key Features

• In-situ freezing architecture eliminates manual transfer between freezer and dryer, minimizing contamination risk and thermal shock to sensitive biomolecules.
• Cascade refrigeration system with silicone oil circulation ensures uniform shelf temperature distribution (±1 °C accuracy) and rapid cooling to ≤−70 °C condenser temperature—critical for efficient water vapor capture during primary drying.
• Touchscreen HMI with embedded PID controllers enables real-time monitoring and adjustment of shelf temperature, chamber pressure, and drying time; graphical drying curves facilitate empirical optimization of cycle parameters.
• Full 304 stainless steel construction (chamber, shelves, condenser) guarantees corrosion resistance, cleanability, and compliance with FDA 21 CFR Part 11–ready data integrity requirements when paired with optional temperature data loggers.
• High-clarity acrylic observation door allows continuous visual assessment of cake morphology, collapse onset, and drying front progression—supporting qualitative validation alongside quantitative metrics.
• Integrated inert gas inlet valve permits controlled nitrogen or argon backfilling post-drying, preserving oxidation-sensitive APIs and stabilizing amorphous structures prior to stoppering.
• Modular design accommodates optional accessories including eutectic point measurement kits (for rational cycle design) and programmable automatic stopper compression units—enabling seamless transition to cGMP-compliant fill-finish workflows.

Sample Compatibility & Compliance

The TF-SFD-5 supports diverse sample formats—including serum vials (Φ16 mm, up to 2112 units/batch; Φ20 mm, up to 1056 units), serum bottles, and open trays—across applications ranging from monoclonal antibody formulations and viral vector suspensions to botanical extracts and probiotic cultures. Its validated operating envelope meets critical performance benchmarks referenced in USP , Ph. Eur. 2.9.40, and ISO 13408-1 for sterile product lyophilization. The system’s traceable temperature control, vacuum stability, and documentation-ready architecture align with GLP/GMP audit expectations for process characterization studies and comparability assessments.

Software & Data Management

Data acquisition is performed via embedded PLC-based logic with timestamped logging of all critical process variables (shelf temp, chamber pressure, condenser temp, elapsed time). When equipped with the optional compliant data logger, the system generates 21 CFR Part 11–compliant electronic records—including user authentication, audit trails, and electronic signatures—ensuring regulatory readiness for FDA, EMA, and NMPA submissions. Export formats include CSV and PDF reports compatible with LIMS integration and statistical process control (SPC) analysis.

Applications

This freeze dryer serves as a bridge between laboratory feasibility testing and commercial manufacturing. It is routinely deployed in: formulation development of parenteral biologics; stability studies of lyophilized vaccines and diagnostics; processing of herbal concentrates requiring preservation of volatile terpenoids; dehydration of microbial cultures for long-term banking; and preparation of reference standards for analytical method validation. Its ability to maintain structural integrity of labile proteins, nucleic acids, and live cells makes it indispensable in academic core facilities, CDMOs, and biotech startups engaged in cell therapy and mRNA vaccine development.

FAQ

What is the maximum batch size supported by the TF-SFD-5?
The unit accommodates up to 2112 standard 10 mL vials (Φ16 mm) or 1056 larger 20 mL vials (Φ20 mm) per cycle, with a total liquid loading capacity of 8 L.
Does the system support cycle development for new formulations?
Yes—the combination of precise shelf temperature control, real-time pressure monitoring, and optional eutectic point testing enables systematic determination of collapse temperature (Tc’), annealing protocols, and optimal primary drying endpoints.
Is the TF-SFD-5 suitable for GMP environments?
While the base configuration meets engineering and operational prerequisites for GMP, full compliance requires implementation of documented IQ/OQ/PQ protocols, qualified data logging, and integration into a validated quality management system.
Can the freeze dryer be used for terminal sterilization processes?
No—lyophilization is a preservation, not a sterilization, process. Sterility must be assured upstream via aseptic filtration or other validated methods prior to loading.
What maintenance intervals are recommended for sustained performance?
Daily inspection of oil levels and condenser frost accumulation; quarterly calibration of temperature sensors and vacuum gauges; annual replacement of refrigerant filters and desiccant in the vacuum pump line per manufacturer specifications.