Tianfeng SFD-5E Pilot-Scale Shelf Freeze Dryer with Stoppering Capability

Overview

The Tianfeng SFD-5E is a pilot-scale, stoppering-capable shelf freeze dryer engineered for reproducible, cGMP-aligned lyophilization of thermolabile pharmaceuticals, biologics, diagnostics reagents, and cosmetic actives. It operates on the fundamental principle of sublimation under deep vacuum: aqueous formulations are first frozen uniformly on temperature-controlled shelves, then subjected to controlled primary drying (ice sublimation) and secondary drying (adsorbed water desorption) at low pressure (<2.7 Pa) and cryogenic condenser temperatures (−75 °C). This process preserves structural integrity, enzymatic activity, protein conformation, and immunogenicity—critical for monoclonal antibodies, vaccines, probiotics, and peptide-based cosmetics. Unlike conventional hot-air or spray drying, freeze drying avoids thermal degradation, oxidation, and pH shifts, making it the gold-standard method for stabilizing labile molecules intended for long-term storage, global distribution, and regulatory submission.

Key Features

• Stainless steel (AISI 304) chamber with fully polished, zero-dead-angle internal geometry—designed for cleanability, sterilizability, and compliance with ISO 14644-1 Class 5 (ISO Class 5) and EU GMP Annex 1 requirements.
• Five + one adjustable shelves (915 mm × 1215 mm), each independently controllable within −55 °C to +70 °C, using low-viscosity silicone oil as heat transfer medium for ±0.5 °C shelf temperature uniformity across full load.
• High-efficiency dual-stage cascade refrigeration system achieving stable −75 °C condenser temperature with 105 kg/24 h ice capture capacity—ensuring robust performance during extended cycles with high-moisture loads (e.g., 140 L bulk solution).
• Integrated stoppering mechanism enabling in-chamber lyophilized vial sealing under sterile, nitrogen-purged conditions—eliminating post-drying handling and reducing contamination risk.
• PLC-based control system with HMI touchscreen interface, pre-loaded with validated cycle templates, real-time parameter logging (shelf temp, chamber pressure, condenser temp, time), and audit-trail-enabled data storage compliant with FDA 21 CFR Part 11 requirements.
• Full compliance with ISO 9001:2015 quality management system; design and manufacturing conform to ASME BPVC Section VIII Div. 1, PED 2014/68/EU, and cGMP Annex 1 (2022) for aseptic processing equipment.

Sample Compatibility & Compliance

The SFD-5E accommodates diverse sample formats: bulk solutions (up to 140 L), standard serum vials (Φ16 mm: 24,800 units; Φ22 mm: 17,800 units), and custom trays. Its validated design supports lyophilization of proteins (e.g., recombinant enzymes, growth factors), live attenuated microorganisms (e.g., lactic acid bacteria, yeast), nucleic acid-based diagnostics, and sensitive botanical extracts. All wetted surfaces meet USP and EP 3.1.1 material compatibility standards. The system supports IQ/OQ/PQ documentation packages and can be configured for 3Q (Qualification) execution per ASTM E2500-13 and ICH Q5C guidelines.

Software & Data Management

The embedded PLC controller records all critical process parameters at ≤1-second intervals, storing raw data in encrypted CSV format with user-defined retention policies. Cycle reports include trend graphs (pressure vs. time, shelf temp ramp profiles), deviation alerts, and electronic signatures. Optional Ethernet/IP or Modbus TCP integration enables connection to SCADA or MES platforms. Data integrity safeguards include role-based access control (RBAC), immutable audit trails, and automatic backup to external NAS or cloud storage—fully aligned with ALCOA+ principles and EU Annex 11 expectations.

Applications

• Pharmaceutical R&D: Formulation screening, stability studies (ICH Q1–Q5), and clinical batch production of injectables, nasal sprays, and ophthalmic preparations.
• Diagnostics: Stabilization of ELISA reagents, PCR master mixes, lateral flow assay components, and reference standards.
• Cosmeceuticals: Preservation of growth factors (EGF, FGF), stem cell lysates, fermented bioactives, and probiotic supernatants without loss of bioactivity.
• Academic & CRO Labs: High-throughput lyophilization of CRISPR-Cas complexes, viral vectors, and exosome suspensions for functional assays.
• Contract Manufacturing: cGMP-compliant production of sterile lyophilized APIs and finished dosage forms under client-defined SOPs.

FAQ

What regulatory certifications does the SFD-5E support?
It is manufactured under ISO 9001:2015 and designed to meet cGMP (21 CFR Parts 210/211), EU GMP Annex 1, and WHO TRS 986 requirements. Full 3Q documentation (IQ/OQ/PQ) and FAT/SAT protocols are available upon request.
Can the system be integrated into an existing cleanroom HVAC infrastructure?
Yes—the unit features HEPA-filtered nitrogen purge ports, VHP-compatible gasket materials, and configurable utility interfaces (compressed air, chilled water, electrical supply) for seamless Grade A/B environment integration.
Is remote monitoring and alarm notification supported?
Standard Ethernet connectivity enables remote access via secure VPN; optional SMS/email alert modules trigger notifications for vacuum failure, temperature excursion, or power interruption.
What validation support is provided post-installation?
Tianfeng offers on-site OQ execution, cycle development assistance, and training for operators, engineers, and QA personnel—including hands-on workshops on cycle optimization, deviation investigation, and data review per FDA Guidance for Industry (2022).