Tianfeng TF-SFD-10PLC Benchtop Pilot-Scale Freeze Dryer

Overview

The Tianfeng TF-SFD-10PLC is a pilot-scale, shelf-type freeze dryer engineered for reproducible, process-controlled lyophilization of heat-sensitive biologicals, pharmaceuticals, and functional food matrices—including sea cucumber extracts, probiotics, enzymes, and diagnostic reagents. It operates on the fundamental principle of sublimation: frozen water is removed directly from the solid phase to vapor under deep vacuum (≤5 Pa), while maintaining product integrity through precise thermal management of the shelf system. Unlike laboratory-scale units, the TF-SFD-10PLC bridges the gap between R&D and small-batch production, offering 1.04 m² of uniform shelf area and integrated programmable logic control (PLC) with real-time data logging—enabling scalable process development compliant with early-stage GMP and GLP requirements.

Key Features

• Integrated in-situ pre-freezing and drying: Eliminates manual transfer between freezer and dryer, reducing contamination risk and ensuring consistent ice nucleation.
• Precision shelf temperature control via thermostatic silicone oil circulation: Achieves ±0.5 °C stability with inter-shelf uniformity ≤1 °C across all five shelves—critical for batch homogeneity and crystallinity control.
• Full-featured PLC control system with 10.4-inch resistive touchscreen interface: Supports up to five independent freeze-drying programs, each configurable with up to 36 time-temperature-vacuum segments.
• Real-time process monitoring and adaptive adjustment: Operators may modify active program parameters—including shelf setpoints, hold durations, and vacuum ramp rates—without interrupting the cycle.
• High-transparency acrylic drying chamber door: Enables visual observation of cake formation, collapse onset, and desiccation progress without compromising vacuum integrity.
• Dedicated inert gas backfill valve (N₂ or Ar compatible): Facilitates oxygen-sensitive product handling and final vial stoppering under controlled atmosphere.
• Modular architecture with external vacuum pump: Simplifies maintenance, reduces internal oil contamination risk, and allows flexible pump selection (e.g., dual-stage rotary vane or dry scroll).

Sample Compatibility & Compliance

The TF-SFD-10PLC accommodates diverse sample formats including stainless steel trays (max. 15 L liquid load), standard serum vials (OD 16 mm: ~3,828 units; OD 22 mm: ~2,016 units), and custom aluminum pans. Its −75 °C condenser ensures efficient capture of volatile solvents (e.g., tert-butanol, acetonitrile) and high-moisture biological slurries. The system meets ISO 9001:2000 quality management standards for design, manufacturing, and documentation traceability. While not pre-certified for FDA 21 CFR Part 11, its audit-ready data logging—storing timestamped vacuum, shelf temperature, condenser temperature, and elapsed time per batch—supports validation protocols aligned with ICH Q5C, USP <1207>, and ASTM F2476-21 guidance for lyophilized product characterization.

Software & Data Management

The proprietary TF-HOS-V1 control software provides dual-mode operation (manual override and fully automated sequence execution), password-protected user access levels, and encrypted local storage of all process records. Each batch generates a unique identifier; raw data (CSV export) and annotated drying curves (PNG/SVG) are retrievable by batch ID for regulatory review. Audit trails log operator actions, parameter changes, and system alarms with timestamps—supporting retrospective analysis and deviation investigations. Optional Ethernet connectivity enables integration into centralized lab information management systems (LIMS) or SCADA networks for enterprise-level monitoring.

Applications

This system is routinely deployed in biopharmaceutical process development labs for formulation screening of monoclonal antibodies, viral vectors, and mRNA-LNPs; in nutraceutical R&D for stabilizing marine-derived actives (e.g., sea cucumber saponins, collagen peptides); and in academic research for preserving microbial cultures, tissue scaffolds, and botanical extracts. Its programmable shelf heating profile supports both primary drying (ice sublimation) and secondary drying (bound water removal) optimization—making it suitable for developing robust, scalable cycles prior to technology transfer to commercial freeze dryers.

FAQ

Is the TF-SFD-10PLC suitable for sterile processing?
No—this unit is not designed for aseptic operation. It lacks ISO Class 5 airflow certification, steam-in-place (SIP) capability, or integrated HEPA filtration. Sterile applications require additional isolator or cleanroom integration.
Can the system handle organic solvent-based formulations?
Yes, provided the solvent’s vapor pressure at −75 °C is sufficiently low. Methanol, ethanol, and acetone require supplemental cold traps or condenser upgrades; tert-butanol and ethyl acetate are compatible with standard configuration.
What vacuum pump is recommended for optimal performance?
A two-stage oil-sealed rotary vane pump rated ≥12 m³/h at 1 Pa is recommended. Dry scroll pumps (≥10 m³/h) may be used where oil contamination must be avoided—but require careful moisture management due to lower ultimate vacuum tolerance.
Does the system support IQ/OQ documentation packages?
Tianfeng provides factory-verified calibration certificates for shelf and condenser sensors (traceable to NIST standards) and offers optional vendor-assisted qualification services—including protocol drafting, execution support, and summary reports aligned with ASTM E2500 and ISPE Baseline Guide Vol. 5.
How is data integrity ensured during power interruption?
The PLC retains all active program states and logged data in non-volatile memory. Upon power restoration, the system resumes from the last validated checkpoint—provided the vacuum and temperature conditions remain within defined recovery thresholds.