Tianfeng TF-SFD-5m² Stoppering Pilot-Scale Freeze Dryer

Overview

The Tianfeng TF-SFD-5m² is a pilot-scale, in-situ pre-freezing freeze dryer engineered for reproducible lyophilization of heat-sensitive biologicals, pharmaceutical intermediates, and functional food products—including pet-grade fish such as cod—under controlled, low-temperature vacuum conditions. It operates on the principle of sublimation: aqueous samples are first frozen solid at ≤−70 °C in the condenser chamber, then subjected to deep vacuum (≤5 Pa) while shelf temperature is precisely ramped through primary and secondary drying phases. This enables water removal directly from ice to vapor without passing through the liquid phase—preserving structural integrity, enzymatic activity, volatile compounds, and nutritional profile. Unlike benchtop lab units or fully industrial lines, the TF-SFD-5m² bridges process development and small-batch manufacturing, supporting scale-up validation for GMP-compliant freeze-drying protocols.

Key Features

• In-situ pre-freezing capability eliminates manual transfer between freezing and drying chambers, minimizing contamination risk and thermal shock to sensitive matrices.
• Silicone oil-heated shelves deliver ±1 °C uniformity across 0.51 m² active area—critical for consistent drying kinetics and residual moisture distribution.
• Five programmable drying cycles, each with up to 24 user-defined segments (shelf temp, hold time, vacuum setpoint), support complex multi-stage protocols including annealing and ramped drying.
• Real-time data acquisition logs shelf temperature, chamber pressure, condenser temperature, and elapsed time; all parameters are timestamped with operator ID and editable during run—enabling full 21 CFR Part 11–compliant audit trails when paired with validated software.
• Optional in-process eutectic point detection allows dynamic adjustment of primary drying endpoints based on product-specific collapse temperature—reducing trial-and-error optimization.
• High-transparency acrylic door provides continuous visual monitoring of cake formation, sublimation front progression, and potential melt-back events without compromising vacuum integrity.
• Integrated inert gas purge valve (N₂ or Ar compatible) supports oxygen-sensitive formulations and facilitates stopper compression under controlled atmosphere.
• Stainless steel 316L shelf construction and electropolished condenser chamber meet hygienic design standards for food-grade and pharmaceutical applications.

Sample Compatibility & Compliance

The TF-SFD-5m² accommodates vials (Φ16 mm: 2112 units/batch; Φ20 mm: 1056 units), trays (standard 278 × 460 mm format), and bulk containers up to 8 L total fill volume. Its −70 °C condenser ensures reliable capture of high-moisture loads—particularly relevant for high-water-content marine proteins like cod fillets—without ice bridging or vapor bypass. The system conforms to ISO 9001:2000 quality management requirements and incorporates mechanical and software-level controls aligned with ICH Q5C, USP , and ASTM F2375-04 (Standard Guide for Lyophilization Process Development). While not certified for sterile manufacturing, its design supports cleanroom integration (ISO Class 5–8) and facilitates cleaning validation per FDA guidance on equipment qualification.

Software & Data Management

Equipped with an industrial-grade PLC and 10.1″ capacitive touchscreen HMI, the TF-SFD-5m² runs embedded firmware supporting password-protected user roles (operator, engineer, administrator), parameter locking, and electronic signature capture. All process data—including vacuum decay curves, shelf temperature ramps, and alarm history—are stored internally and exportable via USB to CSV or PDF. Optional PC-based software extends functionality: trend analysis, comparative batch reporting, deviation flagging, and automated generation of IQ/OQ-ready documentation packages. System logs retain full traceability of configuration changes, login attempts, and manual overrides—meeting GLP audit readiness criteria and serving as foundational evidence for regulatory submissions.

Applications

• Development and pilot production of pet nutrition products—especially single-ingredient freeze-dried fish treats requiring retention of omega-3 fatty acids, myofibrillar protein structure, and natural coloration.
• Stabilization of probiotic cultures, enzymes, and botanical extracts where thermal degradation must be avoided.
• Preparation of reference standards and calibration materials for analytical laboratories requiring long-term stability and minimal hygroscopicity.
• Lyophilization of diagnostic reagents, vaccine candidates, and cell therapy intermediates prior to clinical trial material release.
• Process mapping studies to define critical process parameters (CPPs) for subsequent tech transfer to commercial-scale freeze dryers.

FAQ

Is the TF-SFD-5m² suitable for GMP manufacturing?
It is designed for pilot-scale process development and small-batch production under quality-controlled environments. While not a Class A sterile isolator, it supports GMP-aligned documentation, change control, and equipment qualification when integrated into validated workflows.
Can shelf temperature be ramped during primary drying?
Yes—each of the five stored programs supports up to 24 independent temperature/hold/vacuum steps, enabling dynamic control over drying rate and product temperature.
What vacuum measurement technology is used?
A calibrated Pirani/capacitance manometer combination provides accurate pressure readout from atmospheric to ≤5 Pa, with automatic zeroing and linearization compensation.
Does the system include validation support documentation?
Factory-supplied DQ/IQ templates, sensor calibration certificates (shelves, condenser, chamber), and FAT reports are provided. OQ support is available upon request with qualified third-party vendors.
Is remote monitoring supported?
Ethernet port enables Modbus TCP communication for SCADA integration; optional Wi-Fi module supports secure cloud-based status alerts and limited parameter viewing via web dashboard.