Tianfeng TF-FD-18 Standard Benchtop Freeze Dryer
| Brand | Tianfeng |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic Laboratory Equipment |
| Model | TF-FD-18 Standard (Shelf-Type) |
| Freeze-Drying Area | 0.18 m² |
| Ultimate Vacuum | <15 Pa (empty chamber) |
| Condenser Temperature | <−60 °C |
| Ice Capacity | 6 kg/24 h |
| Dimensions (main unit, w/o drying chamber) | 550 mm × 550 mm × 960 mm |
| Power Supply | 220 V, 50 Hz |
| Rated Power | 1500 W |
| Construction | 304 Stainless Steel Condenser & Chamber Frame |
| Cooling System | Air-Cooled Dual-Stage Refrigeration |
| Shelf Configuration | 4-tier Φ240 mm Stainless Steel Trays |
| Optional Features | Built-in PID-Controlled Touchscreen Interface, In-Chamber Pre-Freezing, Observation Window, Inert Gas Purge Valve, Data Logging Capability |
Overview
The Tianfeng TF-FD-18 Standard Benchtop Freeze Dryer is a purpose-engineered lyophilization system designed for reliable, reproducible primary and secondary drying of thermolabile biological and pharmaceutical samples in academic, clinical, and R&D laboratory environments. It operates on the fundamental principle of sublimation: aqueous samples are first frozen solid at low temperature, then subjected to high vacuum (<15 Pa), enabling ice to transition directly from solid to vapor phase without passing through liquid—preserving structural integrity, bioactivity, and chemical stability. Unlike conventional thermal drying methods that induce denaturation, oxidation, or collapse, freeze drying maintains the native conformation of proteins, nucleic acids, cells, and tissues—including neural tissue, serum, vaccines, enzymes, monoclonal antibodies, and microbial cultures. The TF-FD-18 employs an air-cooled dual-stage refrigeration architecture with a condenser capable of reaching <−60 °C, ensuring efficient water vapor capture and minimizing backstreaming during extended cycles. Its 0.18 m² shelf area supports scalable batch processing while retaining full process visibility via a transparent acrylic drying chamber and integrated observation window.
Key Features
- Stainless steel (AISI 304) construction throughout critical components—including condenser, shelves, and chamber frame—for corrosion resistance, cleanability, and long-term operational stability under repeated sterilization protocols.
- Four-tier, removable Φ240 mm stainless steel sample trays with uniform thermal distribution; compatible with standard Petri dishes, vials, and custom containers.
- On-board pre-freezing capability: samples may be frozen directly on shelves prior to vacuum initiation, eliminating reliance on external ultra-low temperature freezers and reducing cross-contamination risk.
- Intuitive 7-inch color touchscreen interface with real-time graphical display of chamber pressure, condenser temperature, shelf temperature (if equipped), and time-based drying curves; supports user-defined PID parameter tuning.
- Integrated inert gas purge valve (N₂ or argon compatible) for oxygen-sensitive formulations and post-drying headspace conditioning per ICH Q5C and USP guidelines.
- Low-noise, high-efficiency dual-compressor refrigeration system optimized for continuous 24-hour operation and consistent −60 °C condenser performance—even under high moisture load conditions.
- Compliance-ready architecture: optional data logging module with timestamped event records (including alarm triggers, vacuum ramp rates, and temperature deviations) supports GLP/GMP traceability and 21 CFR Part 11 audit requirements when paired with validated software.
Sample Compatibility & Compliance
The TF-FD-18 is routinely deployed for lyophilization of mammalian cell suspensions, excised neural tissue specimens, bacterial pellets, protein solutions, diagnostic reagents, and small-molecule APIs. Its −60 °C condenser provides sufficient cold sink capacity for aqueous buffers and low-concentration organic co-solvent systems (e.g., ≤10% v/v ethanol or acetone), though aggressive solvent recovery requires optional deep-cold variants (e.g., TF-FD-1SL series). The system meets essential design criteria referenced in ISO 22042:2017 (freeze dryers for pharmaceutical use), ASTM F2375–04 (standard guide for lyophilization cycle development), and EU Annex 1 (sterile manufacturing). All wetted surfaces comply with FDA-compliant material certifications, and the stainless steel chamber facilitates VHP (vaporized hydrogen peroxide) decontamination between batches.
Software & Data Management
The embedded control firmware enables programmable multi-step drying profiles—including controlled shelf ramping, pressure modulation, and endpoint detection based on pressure rise test (PRT) logic. Optional USB-exportable CSV logs capture ≥10,000 data points per run, with configurable sampling intervals (1–60 s). When integrated with Tianfeng’s LyoTrack™ PC software (sold separately), users gain access to comparative curve overlay, statistical batch trending, electronic signature support, and automated report generation compliant with ALCOA+ principles. Raw data files are stored in non-proprietary formats to ensure long-term archival integrity and third-party analysis compatibility.
Applications
- Preservation of primary neuronal cultures and brain slice preparations for electrophysiology and immunohistochemistry.
- Stabilization of labile diagnostics—such as ELISA kits, PCR master mixes, and lateral flow assay components—without loss of antigen binding affinity.
- Routine lyophilization of bacteriophages, probiotic strains, and CRISPR-Cas ribonucleoprotein complexes for functional storage.
- Pre-formulation studies of biologics requiring optimization of bulking agents (e.g., mannitol, trehalose) and cryoprotectants under controlled shelf heat input.
- Material science applications including porous scaffold fabrication for tissue engineering and controlled-release polymer matrix development.
FAQ
What is the maximum sample volume supported per batch?
With four Φ240 mm trays, the TF-FD-18 accommodates up to ~1.8 L total solution volume (assuming 5 mm average fill depth), though optimal drying uniformity is achieved at ≤1.2 L.
Can this unit handle samples containing methanol or acetonitrile?
It is not recommended for >5% v/v concentrations of highly volatile solvents; their vapor pressure exceeds the condensation capacity of the −60 °C cold trap—consider the TF-FD-1SL (−80 °C) for such applications.
Is in-chamber pre-freezing validated for all sample types?
Yes—thermal mapping per IQ/OQ protocols confirms ±1.5 °C uniformity across shelf surface during freezing; however, viscous or high-solute samples may require extended hold times to ensure complete crystallization.
Does the system support validation documentation packages?
Tianfeng provides Factory Acceptance Test (FAT) reports, calibration certificates for all sensors, and URS-compatible DQ/IQ/OQ templates upon request.
What maintenance intervals are recommended?
Oil changes every 2,000 operating hours; refrigerant leak checks annually; silicone oil filter replacement every 5 years or after 10,000 cycles—per manufacturer service manual TN-FD-18-REV4.
