Tianfeng TF-FD-18S Benchtop Freeze Dryer with Shelf Heating and Stoppering Function

Overview

The Tianfeng TF-FD-18S is a benchtop, in-situ freeze dryer engineered for precise, reproducible lyophilization of heat-sensitive biologicals, pharmaceuticals, and research-grade samples in laboratory environments. It operates on the fundamental principle of sublimation—removing water from frozen material under deep vacuum while maintaining product integrity below its eutectic and collapse temperatures. Unlike conventional drying methods that apply thermal energy above 0 °C and induce denaturation or structural collapse, this system executes primary drying at cryogenic temperatures (≤ −60 °C condenser) and secondary drying under controlled shelf heating (up to 60 °C), preserving conformational stability, enzymatic activity, and reconstitution fidelity. Its integrated stoppering function enables sealed vial processing without exposure to ambient conditions—critical for sterile formulation development and GMP-aligned process validation studies.

Key Features

• In-situ pre-freezing capability: Samples freeze directly on heated shelves or within the condenser chamber, eliminating manual transfer and minimizing thermal shock.
• Programmable shelf heating: Three-tier stainless steel shelves (Φ220 mm each) support PID-controlled, multi-step temperature ramps and holds—enabling optimization of ice nucleation, primary drying rate, and residual moisture control.
• High-efficiency dual-stage refrigeration: Optimized cascade cooling architecture achieves ≤ −60 °C condenser temperature with low noise (<62 dB(A)) and high ice capture capacity (6 kg/24 h), suitable for aqueous and moderately volatile solvent systems.
• Real-time process monitoring: 7-inch capacitive touchscreen displays synchronized curves for shelf temperature, chamber pressure (capacitance manometer), condenser temperature, and elapsed time—supporting full traceability per ISO 22000 and FDA guidance.
• Robust construction: All-welded 304 stainless steel condenser and internal surfaces ensure corrosion resistance, cleanability, and compliance with USP analytical instrument qualification protocols.
• Backfill and inerting: Integrated solenoid-controlled inert gas (N₂ or Ar) inlet allows controlled atmosphere restoration post-drying—essential for oxygen-sensitive biologics and oxidation-prone small molecules.

Sample Compatibility & Compliance

The TF-FD-18S accommodates vials (10–30 mL), serum bottles, and flat-bottomed trays up to 220 mm diameter across three independently monitored shelves. Its 0.11 m² active drying area supports batch sizes typical of early-phase formulation screening, QC release testing, and stability study execution. The system meets core requirements for laboratory lyophilizer qualification per ASTM F2697-22 (Standard Guide for Validation of Freeze Drying Processes) and aligns with ICH Q5C (Stability Testing of Biotechnological/Biological Products). When equipped with optional audit-trail-enabled data logger, it satisfies 21 CFR Part 11 electronic record and signature criteria. All wetted parts comply with USP Class VI biocompatibility standards, and surface finish (Ra ≤ 0.8 µm) facilitates cleaning verification per ISPE Baseline Guide Volume 4.

Software & Data Management

The embedded control firmware provides intuitive recipe-based operation with up to 99 customizable drying cycles. Each cycle stores complete parameter sets—including shelf setpoints, vacuum ramp rates, hold durations, and pressure endpoints—with timestamped metadata. Exportable CSV logs include second-by-second shelf temperature, chamber pressure, and condenser load—compatible with LIMS integration and statistical process control (SPC) platforms. Optional software add-ons enable remote monitoring via Ethernet/Wi-Fi, automated report generation (PDF/Excel), and deviation alerting via email/SMS. Data integrity safeguards include user-level access controls (admin/operator/guest), electronic signatures, and immutable log archiving—fully auditable during regulatory inspections.

Applications

This system is routinely deployed in academic labs for protein crystallization support, microbial culture preservation, and botanical extract stabilization. In pharmaceutical R&D, it supports lyophilized vaccine candidate development (e.g., mRNA-LNP formulations), monoclonal antibody pilot batches, and sterile API drying under Grade A airflow (when coupled with isolator integration). Quality control laboratories utilize it for reference standard drying, dissolution test sample preparation, and accelerated stability chamber sample conditioning. Its compatibility with organic-aqueous mixtures (e.g., acetone/water, ethanol/water) extends utility to nanomaterial dispersions, polymer nanoparticle carriers, and electrochemical catalyst precursors requiring solvent removal without aggregation.

FAQ

What is the maximum vial loading capacity per shelf?
Each Φ220 mm shelf accommodates up to 120 × 10-mL vials or 48 × 30-mL vials using standard aluminum crimp caps—subject to fill volume and cake height constraints.
Does the system support automated stoppering?
Yes—the TF-FD-18S (Stoppering configuration) integrates a pneumatic or manual hydraulic stoppering mechanism actuated after primary drying completion and prior to chamber venting.
Can the condenser handle solvents other than water?
It captures methanol, ethanol, and acetone at reduced efficiency; for >10% organic content, we recommend the TF-FD-1SL (−80 °C condenser) or optional cold trap extension.
Is calibration certificate included with shipment?
A factory-issued NIST-traceable calibration report for pressure sensor and shelf thermocouples is provided; IQ/OQ documentation packages are available upon request.
What maintenance intervals are recommended?
Oil change every 2,000 operating hours; refrigerant leak check annually; silicone oil top-up for shelf heating system every 5 years or as indicated by viscosity drift.