Tianfeng FZG-5 Laboratory-Scale Production Freeze Dryer

Overview

The Tianfeng FZG-5 is a laboratory-scale production freeze dryer engineered for reproducible, scalable lyophilization of heat-sensitive food matrices—including yeast cultures, kiwifruit puree, tea leaves, and other delicate biologics—under controlled low-temperature vacuum conditions. It operates on the fundamental principle of sublimation: frozen water in the sample transitions directly from solid to vapor phase under deep vacuum (≤2.7 Pa), bypassing the liquid state entirely. This preserves structural integrity, volatile aroma compounds, enzymatic activity, and thermolabile nutrients—critical for functional foods, probiotic powders, and premium nutraceuticals. Designed for pilot-line validation and small-batch commercial output, the FZG-5 bridges the gap between benchtop R&D units and industrial freeze dryers, supporting process development aligned with FDA Q5C, ICH guidelines, and ISO 22000–compliant food manufacturing workflows.

Key Features

• GMP-inspired chamber construction: cylindrical drying chamber and shelves fabricated from AISI 304 stainless steel with mirror-finish electropolished interior—eliminating crevices and enabling full CIP compatibility.
• Integrated condenser design (front-chamber/rear-trap configuration) with sanitary-grade stainless steel coil tubing; available in monolithic or modular configurations per user hygiene requirements.
• Seven-shelf system (6 active + 1 base shelf), customizable with either anodized aluminum trays (optimized thermal conductivity) or 304 stainless steel trays (enhanced cleanability and corrosion resistance).
• High-efficiency refrigeration system using premium imported compressors and refrigerants, achieving ≤−65 °C condenser temperature within ≤90 minutes from ambient start-up.
• Multi-stage vacuum architecture featuring ULVAC (Edwards/Air Products–grade) high-vacuum pumps, supported by robust oil-sealed backing pumps—ensuring stable ≤2.7 Pa operating pressure across batch cycles.
• Omron PLC-based control platform with dual auto/manual operation modes, ≥100 programmable recipe storage slots, real-time parameter logging, and step-jump functionality during active drying.
• Observation window with integrated LED illumination and tempered borosilicate glass—enabling non-invasive visual monitoring without vacuum break.
• Steam or immersion defrost system compliant with HACCP-defined sanitation protocols; full-cycle defrost time ≤45 minutes with residual moisture <0.5% w/w.

Sample Compatibility & Compliance

The FZG-5 accommodates heterogeneous food samples in bulk trays, vials, or custom molds—including fruit pulps (e.g., kiwifruit), microbial suspensions (e.g., Saccharomyces cerevisiae), leaf matrices (green/black tea), and viscous nutraceutical pastes (e.g., royal jelly, ginseng extract). Its shelf temperature range (−45 °C to +70 °C) supports primary drying of ice-rich formulations and secondary drying of low-moisture end-products (residual moisture ≤2.0%). All wetted surfaces meet FDA 21 CFR Part 11 data integrity requirements when paired with validated electronic log modules. The unit’s hygienic geometry conforms to EHEDG Guideline Doc. 8 (2022) for equipment design in food processing, and its documentation package supports GLP/GMP audit readiness—including IQ/OQ protocol templates and material traceability records.

Software & Data Management

The embedded Omron NJ-series PLC delivers deterministic real-time control with microsecond-level I/O response. Process data—including shelf temperature, chamber pressure, condenser temperature, and elapsed time—is timestamped and stored locally on encrypted SD card (≥16 GB) with optional Ethernet/IP or Modbus TCP export. Audit trails record all operator actions, parameter changes, and alarm events—fully compliant with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available). Optional software add-ons enable CSV export, trend charting via OPC UA, and integration into MES platforms (e.g., Siemens Opcenter, Rockwell FactoryTalk).

Applications

• Development and scale-up of freeze-dried fruit powders (kiwifruit, mango, strawberry) retaining >92% anthocyanin and vitamin C content post-lyophilization.
• Stabilization of live yeast and lactic acid bacterial cultures for functional food starters and probiotic supplements.
• Preservation of tea polyphenols and volatile terpenoids without Maillard degradation—critical for premium green and oolong tea powders.
• Production of ready-to-reconstitute soup bases, seasoning blends, and instant beverage concentrates with 18-month ambient shelf life in nitrogen-flushed packaging.
• Lyophilization of collagen peptides, hydrolyzed fish protein, and botanical extracts requiring low-thermal-stress dehydration to maintain bioactivity.

FAQ

What is the maximum batch capacity for kiwifruit puree in the FZG-5?
Based on a typical loading density of 8–10 kg/m² for fruit purees, the 5.13 m² shelf area supports up to 51 kg of unfrozen kiwifruit slurry per cycle.
Can the FZG-5 be validated for pharmaceutical use?
While designed primarily for food and nutraceutical applications, its GMP-aligned construction, PLC traceability, and material certifications support IQ/OQ execution per ASTM E2500 and Annex 15; however, sterile barrier qualification requires additional engineering controls.
Is remote monitoring supported?
Yes—via optional Ethernet gateway module enabling secure HTTPS access to live parameters, historical trends, and alarm logs through standard web browsers.
What maintenance intervals are recommended for the vacuum system?
Oil changes every 2,000 operating hours; cold trap cleaning after every 10 batches; full pump performance verification annually per ISO 8573-1 Class 2 particulate/oil aerosol standards.
Does the system comply with CE or UL safety directives?
The FZG-5 meets CE marking requirements under Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU; UL listing is available upon request with region-specific certification packages.