Tianfeng TF-SFD-2 Standard Benchtop Freeze Dryer with In-situ Pre-freezing

Overview

The Tianfeng TF-SFD-2 is a pilot-scale, in-situ pre-freezing benchtop freeze dryer engineered for reproducible lyophilization of heat-sensitive biological and pharmaceutical formulations—including herbal extracts (e.g., Panax notoginseng extract), traditional decoctions (“Lao Huo Tang”), and other aqueous-based biologics. It operates on the fundamental principle of sublimation under controlled low-pressure and low-temperature conditions: frozen water is removed directly from the solid phase to vapor without passing through the liquid state, preserving structural integrity, enzymatic activity, and chemical stability. The system integrates a dual-function hydraulic silicon oil heating/cooling shelf system, enabling precise thermal management across all shelves—critical for uniform drying kinetics and consistent cake morphology. Designed for laboratory-to-pilot transition workflows, the TF-SFD-2 bridges the gap between analytical-scale feasibility studies and GMP-aligned process development.

Key Features

• In-situ pre-freezing capability eliminates manual transfer between freezing and drying chambers—reducing contamination risk and improving batch consistency.
• Silicon oil-heated shelves deliver ±0.5 °C temperature uniformity (≤1 °C inter-shelf delta), ensuring homogeneous ice nucleation and sublimation front progression.
• Programmable control architecture supports up to five independent drying protocols; each protocol accommodates 24 customizable segments (ramp/hold steps) for dynamic shelf temperature and vacuum setpoint modulation.
• Real-time data acquisition logs vacuum pressure, shelf temperature, condenser temperature, and elapsed time—exportable in CSV format with full timestamped audit trail compliant with ALCOA+ principles.
• Integrated inert gas backfill valve enables nitrogen or argon purging post-drying to prevent oxidation and support aseptic vial stoppering under controlled atmosphere.
• Front-access chamber with high-clarity acrylic viewport allows continuous visual monitoring of product morphology, collapse onset, and drying front advancement without compromising vacuum integrity.
• Robust condenser design achieves ≤−70 °C operating temperature and 3 L/24h ice capacity—optimized for high-moisture-load samples such as concentrated herbal infusions and viscous decoction matrices.

Sample Compatibility & Compliance

The TF-SFD-2 accommodates standard lyophilization containers including 770 × Φ16 mm vials or 400 × Φ20 mm vials per batch, with a maximum loading volume of 3 L per cycle. Its shelf geometry (280 × 360 mm, two active + one spare) supports stainless steel trays, glass petri dishes, and custom silicone molds—ideal for R&D of botanical extracts, cell culture supernatants, enzyme solutions, and vaccine candidates. The system meets ISO 9001:2015 quality management requirements and supports compliance with regulatory frameworks including USP , ICH Q5C, and WHO TRS Annex 6. When configured with optional eutectic point detection and validated operation protocols, it facilitates development aligned with FDA 21 CFR Part 11 data integrity expectations and GLP/GMP documentation standards.

Software & Data Management

Equipped with an industrial-grade PLC and 7-inch resistive touchscreen HMI, the TF-SFD-2 provides intuitive parameter configuration, real-time graphical display of drying curves (vacuum vs. time, shelf temp vs. time), and password-protected user access levels (operator, engineer, administrator). All system events—including program starts/stops, parameter edits, alarm triggers, and door openings—are logged with ISO 8601 timestamps and user IDs. Data export is performed via USB port in comma-separated values (CSV) format, compatible with third-party statistical process control (SPC) and PAT (Process Analytical Technology) platforms. Optional Ethernet connectivity enables remote monitoring and integration into centralized lab informatics systems.

Applications

• Stabilization of thermolabile herbal actives (e.g., notoginsenosides from Panax notoginseng) without degradation.
• Lyophilization of complex traditional Chinese medicine (TCM) decoctions to enable standardized dosing, extended shelf life, and improved solubility profiles.
• Pilot-scale formulation development for parenteral biologics, diagnostic reagents, and probiotic powders.
• Process optimization studies—including primary drying endpoint determination, annealing trials, and collapse temperature mapping—using integrated eutectic point detection.
• Academic research in food science (e.g., functional ingredient preservation), microbiology (culture preservation), and material science (aerogel precursor drying).

FAQ

Is the TF-SFD-2 suitable for GMP-compliant process development?
Yes—when operated with documented SOPs, qualified instrumentation, and enabled data logging features, it supports early-phase process validation activities under ICH Q5C and EU Annex 15 guidelines.
Can shelf temperature be ramped during primary drying?
Yes—the programmable controller allows multi-segment ramp-and-hold profiles, enabling controlled shelf temperature elevation synchronized with pressure feedback to maximize sublimation rate without product meltback.
What is the maximum allowable total solids content for stable drying?
For optimal cake structure and drying efficiency, total solids should generally remain below 20% w/v; higher concentrations may require extended drying times or process annealing.
Does the system include validation support documentation?
Tianfeng provides IQ/OQ protocol templates and factory calibration certificates; site-specific PQ execution requires user-defined acceptance criteria and qualified personnel.
Is remote diagnostics supported?
Standard configuration includes local USB data export; optional RS485/Ethernet modules enable SCADA integration and remote troubleshooting via secure VPN.