DISTEK EZFILL 4500 Solvent Preparation System
| Brand | Distek |
|---|---|
| Origin | USA |
| Model | EZFILL 4500 |
| Dispensing Volume | 250–1000 mL |
| Dispensing Accuracy | ±1% of set volume or ±5 mL |
| Heating Range | Ambient to 45°C |
| Temperature Accuracy | ±2°C |
| Dissolved Oxygen Level | ≤3.0 ppm (typical), ≤5.0 ppm (max) |
| Integrated Filter | 25 mm diameter |
| Surface Active Agent Tolerance | up to 2% (w/v) |
Overview
The DISTEK EZFILL 4500 Solvent Preparation System is an integrated, benchtop-compatible platform engineered for precise, reproducible, and GMP-aligned solvent conditioning in pharmaceutical dissolution testing workflows. It operates on a dual-principle architecture: in-line resistive heating combined with piston-driven vacuum degassing—enabling rapid, controlled preparation of aqueous and organic solvent media under defined thermal and oxidative conditions. Unlike conventional immersion-heated or static vacuum systems, the EZFILL 4500 eliminates thermal lag through direct conductive heating and achieves sub-5 ppm dissolved oxygen levels via a sealed, positive-displacement vacuum chamber. This design ensures compliance with USP , , and ICH Q5C requirements for solvent consistency—particularly critical when preparing media containing surfactants (e.g., SDS, polysorbates) or pH-sensitive buffers where gas nucleation and temperature drift compromise assay robustness.
Key Features
- In-line heating system delivers immediate thermal response—no preheat delay—and maintains temperature stability within ±2°C across the full 20–45°C operational range.
- Piston-actuated vacuum chamber generates consistent vacuum levels (>95 kPa) without oil contamination or pump maintenance, enabling repeatable deaeration and volumetric dispensing in a single integrated step.
- Volumetric accuracy of ±1% or ±5 mL (whichever is greater) across the 250–1000 mL dispensing range, validated per ASTM E29-23 for measurement uncertainty reporting.
- Integrated 25 mm diameter hydrophilic membrane filter (0.45 µm pore size) positioned upstream of the dispensing nozzle to prevent particulate carryover into dissolution vessels.
- Multi-Dose Cycling (MDC) mode supports parallel preparation of up to six dissolution vessels when dispensing ≤500 mL per cycle—reducing inter-vessel variability and operator intervention.
- Surfactant-tolerant fluid path accommodates formulations containing up to 2% (w/v) nonionic or anionic surfactants without foam generation or flow interruption.
Sample Compatibility & Compliance
The EZFILL 4500 is validated for use with USP-recommended dissolution media including 0.1 N HCl, phosphate buffers (pH 4.5–6.8), simulated gastric/intestinal fluids (SGF/ SIF), and ethanol–water mixtures. Its stainless-steel and PTFE-wetted components meet USP Class VI biocompatibility standards and resist degradation from low-pH or high-surfactant environments. The system supports 21 CFR Part 11-compliant operation when paired with DISTEK’s optional EZControl software—providing electronic signatures, audit trails, and user-access controls required for FDA-regulated laboratories. All calibration and performance qualification protocols align with ISO/IEC 17025:2017 and are documented per GLP Annex 11 guidelines.
Software & Data Management
When interfaced with DISTEK EZControl v3.2+ software, the EZFILL 4500 enables method-based parameter locking, automated run logging, and export of CSV-formatted dispensing records—including timestamp, setpoint values, actual temperature, vacuum duration, and final DO concentration (if connected to an external dissolved oxygen meter). Audit trail functionality captures all user actions, parameter changes, and system events with immutable timestamps. Data integrity safeguards include role-based permissions, electronic signature enforcement, and encrypted local storage compliant with EU Annex 11 and FDA Data Integrity Guidance (2018).
Applications
- Preparation of dissolution media for USP Apparatus 1 (basket) and Apparatus 2 (paddle) testing in QC release and stability studies.
- Conditioning of solvents for forced degradation studies requiring strict control of dissolved oxygen and thermal history.
- High-throughput formulation screening where surfactant-containing media must be prepared without foaming or phase separation.
- Method transfer between R&D, pilot plant, and commercial manufacturing sites—ensuring identical solvent conditioning parameters across locations.
- Support of bioequivalence studies under FDA and EMA regulatory expectations for media traceability and environmental control.
FAQ
Does the EZFILL 4500 require external compressed air or vacuum sources?
No—the system incorporates an integrated, oil-free diaphragm vacuum pump and does not rely on facility-supplied utilities.
Can it be used with organic solvents such as ethanol or isopropanol?
Yes—provided compatibility with wetted materials (316L SS, PTFE, FKM) is confirmed; recommended for aqueous-organic blends ≤30% v/v.
Is routine calibration required, and what documentation is provided?
Annual PQ (Performance Qualification) is recommended; factory-provided IQ/OQ documentation includes temperature mapping, volume delivery verification, and DO validation reports.
How is temperature uniformity verified during dispensing?
A calibrated PT100 sensor embedded in the heating block monitors real-time thermal output, and system firmware applies PID-controlled compensation to maintain setpoint stability across dispensing cycles.
What maintenance intervals are specified for the vacuum chamber seals and filter cartridges?
Vacuum chamber O-rings should be inspected every 6 months and replaced annually; 25 mm filters are single-use and must be changed after each solvent batch or daily in high-throughput environments.
