Tianfeng TF-FD-27S Benchtop Freeze Dryer (Standard Shelf Type)

Overview

The Tianfeng TF-FD-27S is a benchtop, standard-shelf-type freeze dryer engineered for reproducible, scalable lyophilization of heat-sensitive biological and pharmaceutical samples in laboratory environments. It operates on the fundamental principle of sublimation—removing water from frozen materials under deep vacuum while maintaining product integrity below the eutectic and collapse temperatures. Unlike conventional thermal drying methods that induce denaturation, oxidation, or structural collapse, this system preserves native conformation, bioactivity, and reconstitution fidelity in biologics including plasma derivatives, monoclonal antibodies, vaccines, enzymes, and diagnostic reagents. Its −80 °C condenser enables efficient capture of both aqueous and low-volatility organic solvents (e.g., acetone, ethanol, tert-butanol), supporting broader formulation compatibility than single-stage systems. Designed for full-cycle automation—from pre-freezing through primary and secondary drying—the TF-FD-27S integrates shelf-based heat transfer via silicone oil circulation (±1 °C uniformity) to ensure consistent drying kinetics across all layers.

Key Features

• Air-cooled dual-stage cascade refrigeration system delivering stable condenser temperatures below −80 °C, enabling high-efficiency ice trapping and extended operation with volatile solvent-containing formulations.
• Six-tier stainless steel (AISI 304) shelves (Φ240 mm each), precision-machined for flatness and thermal homogeneity; compatible with standard lyophilization trays and vials.
• Touchscreen HMI with real-time graphical display of shelf temperature, chamber pressure, and drying progress curves; supports user-defined ramp/hold profiles with PID-controlled shelf heating (0–60 °C range).
• Transparent acrylic drying chamber with integrated observation window, allowing unobstructed visual monitoring of ice sublimation, cake morphology, and potential collapse events.
• Robust vacuum system achieving ≤15 Pa at no-load, compatible with external vacuum pumps meeting ISO 8573-1 Class 2 purity standards; optional inert gas backfilling valve for oxygen-sensitive products.
• Full 304 stainless steel internal construction—including condenser, shelf manifold, and chamber walls—ensuring corrosion resistance, cleanability, and compliance with cGMP cleaning validation protocols.
• Modular architecture supporting optional GLP-compliant data logging (21 CFR Part 11 audit trail), co-lyophilization point detection, and automated stoppering integration for vial-based workflows.

Sample Compatibility & Compliance

The TF-FD-27S accommodates diverse sample formats: bulk solutions in trays, serum vials (2–20 mL), and multi-neck flasks via optional manifold configurations. Its −80 °C condenser and 6 kg/24 h ice capacity support lyophilization of plasma concentrates, cell lysates, microbial cultures, and excipient-blended APIs. The system meets foundational requirements for ISO 22042 (freeze-drying equipment), ASTM F2375 (sterile barrier integrity), and USP (container closure integrity testing preparation). When configured with validated data logging and electronic signatures, it satisfies documentation traceability expectations under FDA 21 CFR Part 11 and EU Annex 11 for quality-critical development batches. All wetted surfaces comply with USP Class VI biocompatibility and ASME BPE surface finish specifications (Ra ≤ 0.8 µm).

Software & Data Management

The embedded control software provides intuitive cycle programming with up to 32 customizable steps per protocol—including freezing rate control, annealing holds, primary drying ramping, and secondary drying isotherms. Real-time data streams (shelf temp, chamber pressure, condenser temp, elapsed time) are logged at user-selectable intervals (1 s to 10 min) and exportable as CSV or PDF reports. Optional compliant data loggers offer encrypted storage, role-based access control, electronic signatures, and automated backup to network drives—fully aligned with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available). Remote monitoring via Ethernet or Wi-Fi is supported for centralized lab fleet management.

Applications

This freeze dryer serves analytical and process-development laboratories engaged in: stabilization of human and animal plasma fractions for transfusion medicine; formulation screening of biopharmaceuticals (e.g., mAbs, fusion proteins); preservation of reference standards and calibration materials; preparation of sterile diagnostic reagents; lyophilization of probiotic cultures and enzyme preparations; and small-batch production of clinical trial supplies. Its 0.27 m² drying area bridges the gap between benchtop feasibility studies and pilot-scale process definition—enabling direct scale-up correlation using identical critical process parameters (CPPs) such as shelf temperature, chamber pressure, and product temperature.

FAQ

What is the maximum sample volume this unit can process per batch?
With six Φ240 mm trays, the TF-FD-27S supports up to ~4.5 L of uniformly distributed solution (assuming 5 mm depth), though optimal loading depends on solute concentration and desired drying time.
Does the system support controlled nucleation or annealing cycles?
Yes—via programmable shelf temperature profiles, users can implement precise nucleation triggers (e.g., fast freeze to −45 °C followed by controlled warm hold) and annealing steps to improve crystallinity and shorten primary drying duration.
Can I monitor product temperature directly during lyophilization?
While the base configuration does not include thermocouples, the system features dedicated ports for PT100 or thermistor-based product temperature sensors, compatible with third-party monitoring systems meeting IEC 61000-4-3 EMC standards.
Is validation support documentation available?
Tianfeng provides IQ/OQ protocol templates, factory acceptance test (FAT) reports, and material certifications (304 SS mill test reports, refrigerant safety data sheets); site-specific PQ execution requires user-defined acceptance criteria aligned with ICH Q5C and Q5D guidelines.
What maintenance intervals are recommended for sustained performance?
Vacuum pump oil replacement every 500 operating hours; condenser coil inspection quarterly; silicone oil top-up annually; full system leak check and calibration verification biannually per ISO/IEC 17025 recommendations.