Tianfeng TF-FZG-300 Industrial-Scale Freeze Dryer for Food Processing

Overview

The Tianfeng TF-FZG-300 is an industrial-scale, shelf-type freeze dryer engineered for continuous, high-throughput lyophilization of heat-sensitive food matrices—including fruits (e.g., strawberries), vegetables, seafood, pet nutrition products, and herbal extracts. It operates on the fundamental principle of sublimation: frozen water is removed directly from the solid phase to vapor under deep vacuum conditions, preserving structural integrity, volatile compounds, enzymatic activity, and nutritional profile far more effectively than conventional thermal drying methods. Designed for GMP-compliant production environments, the unit integrates a monolithic chamber–condenser architecture with front-chamber/rear-trap configuration, minimizing footprint while maximizing thermal efficiency and process repeatability. Its 296 m² effective shelf area supports batch processing of up to 3 metric tons of raw material per cycle—making it suitable for commercial-scale dehydration lines serving functional food, nutraceutical, and ready-to-eat meal manufacturers.

Key Features

• GMP-aligned construction: Entire drying chamber and shelves fabricated from electropolished AISI 304 stainless steel (surface roughness Ra ≤ 0.4 µm), conforming to ISO 14644-1 Class 7 cleanroom-compatible surface standards.
• Modular shelf system: Configurable shelving with (15+1) × 2 × 2 layout; optional aluminum extrusion or 304 stainless steel shelves—both engineered for uniform heat transfer (±0.5 °C shelf-to-shelf deviation at steady state).
• High-capacity cold trap: Dual-zone condenser with sanitary-grade stainless steel coil assembly, achieving ≤ −65 °C operating temperature and 4500 kg/24 h ice capture capacity under ≤ 2.7 Pa ultimate vacuum.
• Robust refrigeration architecture: Multi-stage cascade system using premium imported compressors (e.g., Bitzer, Hanbell), enabling rapid cooldown (< 120 min from ambient to −60 °C) and stable shelf temperature control across full range (−45 °C to +80 °C).
• Redundant vacuum generation: ULVAC-series high-vacuum pumps (or equivalent Edwards/Airco grade), supported by variable-frequency-driven backing pumps and integrated vacuum gauging with Pirani/cold cathode hybrid sensors.
• Intelligent process control: Omron CJ2M PLC platform with IPC-based HMI interface, supporting ≥ 100 customizable drying protocols, real-time parameter logging (shelf temp, chamber pressure, condenser temp, vacuum rate), and audit-trail-enabled operation per FDA 21 CFR Part 11 requirements.

Sample Compatibility & Compliance

The TF-FZG-300 accommodates diverse sample formats—including bulk trays (up to 12 SUS304 trolleys), stacked pans, and custom molds—optimized for low-viscosity aqueous matrices typical of fruit purees, vegetable slices, seafood fillets, and powdered botanical extracts. All wetted surfaces comply with EC 1935/2004 food contact material regulations and ASME BPE-2021 hygienic design criteria. The system meets ISO 22000:2018 food safety management prerequisites and supports validation documentation packages aligned with ASTM F2337 (Standard Practice for Validation of Freeze Drying Processes) and ICH Q5C (Stability Testing of Biotechnological Products). Optional IQ/OQ documentation kits are available for GLP/GMP-regulated facilities.

Software & Data Management

The integrated industrial PC runs proprietary Tianfeng LyoControl™ v4.x software, offering dual-mode operation (automatic sequence execution or manual step-by-step override), dynamic recipe editing during active cycles, and non-linear ramp/soak profiling. All operational data—including time-stamped sensor readings, alarm logs, and user actions—are stored locally in encrypted SQLite databases with automatic daily backup to network-attached storage (NAS) or cloud endpoints via TLS 1.3–secured Wi-Fi or Ethernet. Full electronic signature support, role-based access control (RBAC), and 21 CFR Part 11–compliant audit trails ensure regulatory readiness for FDA, EMA, and NMPA inspections.

Applications

• Primary dehydration of strawberries, apples, mangoes, and mixed berries into crispy, rehydration-ready snacks retaining >92% anthocyanin and vitamin C content.
• Stabilization of enzymatically active vegetable powders (e.g., spinach, kale, broccoli sprouts) for encapsulation in dietary supplements.
• Production of shelf-stable pet treats with preserved palatability, protein structure, and moisture content < 5% w/w.
• Processing of marine collagen peptides, fish hydrolysates, and shellfish extracts without Maillard degradation or lipid oxidation.
• Batch lyophilization of traditional Chinese medicinal herbs (e.g., ginseng, goji berry, astragalus) to standardize bioactive marker concentrations (e.g., ginsenosides, polysaccharides).

FAQ

Is the TF-FZG-300 compliant with international pharmaceutical or food-grade validation standards?
Yes—the system supports full qualification (DQ/IQ/OQ/PQ) documentation packages and conforms to ASTM F2337, ISO 22000, and EU Annex 11 requirements for automated systems used in food manufacturing.
Can shelf temperature profiles be programmed independently per zone?
No—shelves operate in synchronized thermal zones; however, multi-segment ramp/soak profiles can be defined per cycle with ±0.3 °C stability tolerance.
What vacuum pump options are available beyond the standard ULVAC configuration?
Custom configurations include oil-free dry screw pumps (e.g., Pfeiffer DuoLine), hybrid turbomolecular–scroll combinations, and explosion-proof variants for solvent-laden processes.
Does the system support steam sterilization (SIP) of the chamber?
Not as standard; SIP capability requires optional jacketed chamber design and integrated steam distribution manifold—available under engineering change order (ECO).
How is defrosting performed, and what is the typical cycle duration?
Defrosting uses either hot gas injection or steam-assisted melting, completing within ≤ 45 minutes with full drain and purge verification—validated per ASME BPE Section 6.3.