Tianfeng SFD-5 Pilot-Scale Shelf-Type Freeze Dryer

Overview

The Tianfeng SFD-5 Pilot-Scale Shelf-Type Freeze Dryer is an engineered solution for process development, formulation optimization, and small-batch cGMP-compliant manufacturing of thermolabile biopharmaceuticals, diagnostics, and functional biomaterials. Based on the fundamental principles of lyophilization—sublimation of ice under vacuum while maintaining product integrity below its eutectic temperature—the SFD-5 delivers precise thermal management across all shelf surfaces via a fully jacketed silicone oil circulation system. Unlike vapor compression or direct refrigerant-cooled systems, this design ensures exceptional temperature uniformity (≤±1 °C across all shelf zones) and eliminates localized hot/cold spots that compromise cake homogeneity and residual moisture distribution. Its 0.5 m² effective shelf area supports scalable batch sizes—from R&D vial trials to pilot-scale production runs—while meeting critical requirements for sterility assurance, process repeatability, and regulatory traceability.

Key Features

• Silicone Oil–Based Heat Transfer System: Enables accurate, stable, and uniform shelf temperature control from −50 °C to +80 °C with ≤±1 °C deviation across all three active shelves and one bottom shelf—essential for consistent primary drying rates and secondary drying efficiency.
• Cascade Refrigeration Architecture: Dual-stage compressor system achieves condenser temperatures ≤−70 °C and sustained water vapor capture capacity of 8 kg per 24-hour cycle, minimizing ice buildup and ensuring uninterrupted operation during extended drying cycles.
• Integrated In-Situ Pre-Freezing: Eliminates manual transfer between freezing and drying chambers, reducing contamination risk and preserving nucleation state—critical for monoclonal antibodies, viral vectors, and live attenuated vaccines.
• High-Transparency Acrylic Viewing Door: Allows continuous visual monitoring of cake formation, collapse events, and desiccation progression without compromising vacuum integrity or introducing thermal disturbance.
• Stainless Steel 316L-Compatible Construction: Entire drying chamber, shelves, and condenser housing fabricated from electropolished AISI 304 stainless steel; compliant with ASME BPE surface finish standards for pharmaceutical applications.
• Modular Control Platform: Standard 7-inch touchscreen HMI with embedded PID algorithms, real-time drying curve visualization, and configurable alarm thresholds; optionally upgradeable to IEC 61131-3 compliant PLC with Ethernet/IP or Modbus TCP connectivity.
• Inert Gas Backfilling Valve: Integrated solenoid-controlled inlet for nitrogen or argon purging post-drying—supports oxygen-sensitive formulations and enables stopper compression under controlled atmosphere.

Sample Compatibility & Compliance

The SFD-5 accommodates diverse sample formats including serum vials (Φ16 mm up to 1914 units; Φ20 mm up to 1008 units), trays (max. 8 L liquid load), and custom containers. It supports lyophilization of proteins, peptides, plasmid DNA, mRNA-LNPs, bacterial lysates, and botanical extracts—including traditional Chinese medicine (TCM) preparations such as Ganoderma lucidum (Reishi mushroom), Cordyceps sinensis, and Panax ginseng. The system meets core prerequisites for ISO 22000, ASTM F2476 (lyophilizer qualification), and USP / environmental control expectations. When configured with audit-trail-enabled data logging and electronic signatures, it satisfies FDA 21 CFR Part 11 and EU Annex 11 requirements for computerized system validation in GMP environments.

Software & Data Management

The embedded control software records time-stamped temperature (shelf, product, condenser), pressure (chamber, condenser), and vacuum level at user-defined intervals (1–60 sec). All datasets are exportable in CSV or PDF format with digital signature support. Optional advanced packages include automated eutectic point detection via resistance-based probing, dynamic ramp-hold scheduling, and integration with MES/LIMS platforms via OPC UA. Historical batch files retain full metadata—including operator ID, parameter set version, and calibration timestamps—to facilitate root cause analysis and regulatory submissions (e.g., IND, BLA, MAA).

Applications

• Process characterization and scale-up studies for parenteral biologics (mAbs, fusion proteins, bispecifics)
• Stabilization of diagnostic reagents (ELISA kits, lateral flow components, PCR master mixes)
• Preservation of microbial cultures, probiotics, and bacteriophages
• Lyophilization of herbal extracts and nutraceuticals requiring low-temperature dehydration
• Preparation of reference standards and certified reference materials (CRMs) for QC laboratories
• Long-term storage of tissues, stem cells, and extracellular vesicles under cryo-conserved conditions

FAQ

What is the maximum batch size supported by the SFD-5?

The unit supports up to 8 liters of aqueous load or 1914 standard 10-mL serum vials (Φ16 mm), depending on fill volume and formulation viscosity.
Can the SFD-5 be qualified for GMP manufacturing?

Yes—when equipped with IQ/OQ documentation packages, calibrated sensors traceable to NIST standards, and 21 CFR Part 11–compliant data handling modules, it meets baseline requirements for Phase I–III clinical supply and commercial lot release.
Is remote monitoring available?

Standard Ethernet port enables web-based access to real-time parameters and historical logs; optional VPN-secured cloud interface allows off-site supervision and alarm notifications via email or SMS.
Does the system support automated stoppering?

An optional hydraulic or pneumatic stopper-compression module can be integrated, enabling fully automated closure under inert gas after drying completion.
What vacuum pump options are compatible?

The system interfaces with oil-lubricated rotary vane pumps (e.g., Edwards RV8), dry scroll pumps (e.g., Agilent IDP-10), or hybrid turbo-molecular systems—selection based on ultimate vacuum target, solvent compatibility, and cleanroom noise constraints.