Tianfeng TF-FD-18S Stoppering Freeze Dryer

Overview

The Tianfeng TF-FD-18S Stoppering Freeze Dryer is a laboratory-grade, vertically oriented lyophilization system engineered for reproducible, controlled freeze drying of heat-sensitive biological and pharmaceutical samples. It operates on the fundamental principle of sublimation—removing water from frozen material under deep vacuum while maintaining the sample in its solid phase. This process preserves structural integrity, bioactivity, and chemical stability far more effectively than conventional thermal drying methods. The TF-FD-18S integrates a dual-stage cascade refrigeration system to achieve condenser temperatures below −60 °C, enabling efficient capture of both aqueous and moderately volatile solvents (e.g., ethanol, acetone). Its in-situ pre-freezing capability eliminates manual transfer between freezing and drying stages, minimizing contamination risk and thermal shock. Designed for compliance-driven environments, the system supports Good Laboratory Practice (GLP) workflows through traceable parameter logging, programmable shelf heating profiles, and optional 21 CFR Part 11–compliant data recording.

Key Features

• Programmable electrically heated shelves (3 tiers, Φ220 mm each) with ±1 °C uniformity, enabling precise control over primary and secondary drying phases;
• Cascade refrigeration architecture delivering stable condenser operation at <−60 °C and ice capacity of 6 kg per 24 hours;
• Real-time touchscreen interface displaying concurrent lyophilization curves: shelf temperature, chamber pressure, condenser temperature, and relative humidity trend;
• Full 304 stainless steel chamber and condenser housing for corrosion resistance, cleanability, and long-term durability;
• Optical-grade transparent acrylic drying chamber door with integrated observation window for non-invasive process monitoring;
• Integrated inert gas backfill valve (N₂ or argon compatible) for oxygen-sensitive formulations and sterile stoppering;
• Modular design supporting optional accessories: co-lyophilization point detection module, automatic stopper compression actuator, and GLP-compliant temperature data logger with audit trail;
• PID-based vacuum regulation and intelligent defrost cycle management to maintain system reliability across extended runs.

Sample Compatibility & Compliance

The TF-FD-18S accommodates vials (10–30 mL), serum bottles, and flat-bottomed trays up to 0.11 m² total shelf area. It is routinely deployed for lyophilizing monoclonal antibodies, recombinant proteins, live-attenuated vaccines, diagnostic enzyme reagents, and botanical extracts—including those containing up to 20% organic co-solvents. The system meets essential mechanical and operational requirements outlined in ISO 22042:2016 (freeze dryers for pharmaceutical use) and aligns with ASTM F2375–21 guidance on lyophilization process validation. When equipped with a certified data logger and electronic signature functionality, it supports regulatory submissions under FDA 21 CFR Part 11 and EU Annex 11 for computerized system validation. All wetted surfaces comply with USP material classification standards.

Software & Data Management

The embedded control software provides full-cycle protocol definition: pre-freeze ramp rate, hold duration, primary drying ramp/slope, shelf temperature setpoints, vacuum setpoints, and secondary drying dwell time. Each run generates a timestamped .csv log file containing second-by-second values for all monitored parameters. Exported datasets are compatible with common statistical process control (SPC) platforms (e.g., JMP, Minitab) and LIMS integration via RS-485 or Ethernet (Modbus TCP). Optional firmware upgrades enable automated batch reporting compliant with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available). Audit trails record user login/logout events, parameter modifications, and alarm acknowledgments—retained for ≥36 months.

Applications

• Stabilization of thermolabile biologics (e.g., cytokines, viral vectors, CRISPR-Cas ribonucleoproteins);
• Formulation development for parenteral dosage forms requiring sterile terminal processing;
• Long-term archiving of microbial cultures, cell lines, and tissue specimens without cryoprotectants;
• Preparation of reference standards for analytical chemistry (HPLC, LC-MS) with minimized degradation artifacts;
• Drying of nanosuspensions and liposomal drug carriers where particle aggregation must be avoided;
• Processing of herbal extracts and functional food ingredients while retaining polyphenol and volatile oil profiles.

FAQ

What is the maximum vial loading capacity for the TF-FD-18S in stoppering configuration?

The unit accommodates up to 400 standard 20-mL serum vials (Φ22 mm) across three shelves, assuming uniform monolayer distribution and adequate inter-vial spacing for vapor flow.
Does the system support validation protocols per IQ/OQ/PQ requirements?

Yes—factory-installed calibration certificates for temperature sensors (shelf, condenser, chamber) and vacuum transducers are provided. Optional IQ/OQ documentation packages and third-party PQ execution support are available upon request.
Can the TF-FD-18S handle samples with high ethanol content (e.g., >30%)?

While optimized for aqueous and low-to-moderate organic solvent systems, sustained operation with >25% ethanol requires optional cold trap enhancement and reduced load volume to prevent condenser overload and vacuum instability.
Is remote monitoring supported?

Standard Ethernet connectivity enables secure remote access via VPN-configured network environments; real-time dashboard viewing and alarm notifications are enabled through optional cloud gateway licensing.
What maintenance intervals are recommended for optimal performance?

Oil change for the dual compressors every 6,000 operating hours; vacuum pump oil replacement every 500 hours; O-ring inspection and silicone grease reapplication every 12 months; full system leak check prior to critical GMP batches.