DRETOP F-550 High-Speed Dispersing Mixer
| Brand | DRETOP |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | F-550 |
| Instrument Type | Electric Stirrer |
| Maximum Mixing Volume | 3 L |
| Speed Range | 0–8000 rpm |
Overview
The DRETOP F-550 High-Speed Dispersing Mixer is an engineered laboratory-scale mixing and dispersion system designed for rigorous R&D and pilot-scale formulation development. It operates on the principle of high-shear hydrodynamic dispersion, utilizing controlled turbulent flow generated by a rotating circular-toothed dispersing disc to achieve efficient solid–liquid wetting, particle deagglomeration, and colloidal stabilization. Unlike conventional magnetic or overhead stirrers, the F-550 delivers precise mechanical energy input across a broad speed spectrum (0–8000 rpm), enabling reproducible process simulation for shear-sensitive and high-viscosity systems. Its robust cast-aluminum motor housing, brushless inverter-driven motor, and low-thermal-load design ensure stable long-duration operation—critical for batch consistency in QC labs and formulation laboratories across chemical, pharmaceutical, and advanced materials sectors.
Key Features
- Brushless frequency-controlled motor (550 W) with integrated inverter for precise speed regulation and minimal heat generation
- Digital LED display showing real-time rotational speed (rpm), eliminating analog estimation errors
- Multi-position rotary potentiometer for smooth, stepless speed adjustment—no gear shifts or discrete speed steps
- Interchangeable dispersing discs (standard 50 mm and 60 mm diameter, circular serrated profile) optimized for vortex formation, radial flow induction, and axial recirculation
- Manual lift column with 200 mm vertical travel range, accommodating standard double-jacketed mixing vessels (L-series)
- Compliance-ready mechanical architecture: all electrical components meet IEC 61000-6-3 (EMC emission) and IEC 61000-6-2 (immunity) standards
Sample Compatibility & Compliance
The F-550 is validated for use with aqueous and non-aqueous suspensions, emulsions, pastes, and high-solids slurries up to 3 L working volume. It supports common lab-grade containers including double-jacketed stainless steel or borosilicate glass vessels (L-series configuration), enabling temperature-controlled dispersion when paired with external chillers or heating circulators. The system complies with general laboratory safety requirements per ISO/IEC 17025:2017 Annex A.2 (equipment verification) and supports traceable calibration via external tachometer validation. While not intrinsically rated for hazardous area use, optional explosion-proof inverter modules (certified to ATEX II 2G Ex db IIB T4 Gb) are available upon request for solvent-based applications requiring Class I Division 1 compliance.
Software & Data Management
The F-550 operates as a standalone instrument with no embedded software or network interface. However, its analog speed output signal (0–10 V DC) and digital pulse train (TTL-compatible) enable integration into third-party data acquisition systems (e.g., LabVIEW, MATLAB, or SCADA platforms) for time-stamped RPM logging and process correlation. For GLP/GMP environments, users may implement external audit-trail-capable controllers that record speed setpoints, run duration, and operator ID—meeting FDA 21 CFR Part 11 requirements when configured with electronic signatures and secure user access controls. Routine performance verification follows ASTM D2196 (Standard Test Methods for Rheological Properties of Non-Newtonian Materials) and ISO 16949 Annex B (mixing equipment qualification).
Applications
- Preparation of pigment dispersions in waterborne and solventborne coatings, inks, and dyes
- Exfoliation and stabilization of graphene oxide and other 2D nanomaterials in polymer matrices
- Homogenization of pharmaceutical suspensions and topical emulsions under USP guidance
- Rheological conditioning of adhesives, sealants, and elastomeric formulations prior to viscosity testing
- Accelerated aging studies involving particle size evolution in latex and acrylic emulsions (per ISO 13320)
- Batch-wise dispersion of ceramic powders and battery electrode slurries for lithium-ion R&D
FAQ
What is the maximum viscosity this mixer can handle at full speed?
At 8000 rpm, optimal performance is maintained for Newtonian fluids up to ~500 mPa·s; for higher viscosities, reduced speed settings (≤3000 rpm) are recommended to maintain laminar-to-turbulent transition control.
Can the F-550 be used with jacketed reactors for temperature-controlled dispersion?
Yes—the standard L-series double-jacketed vessel mount is compatible with circulating chillers/heaters operating within –20 °C to +80 °C, provided thermal expansion differentials are accounted for in vessel clamping.
Is calibration documentation included with shipment?
A factory-verified speed calibration certificate (traceable to NIM, China) is supplied; users must perform periodic in-house verification using a certified handheld tachometer per ISO/IEC 17025 clause 6.5.
Does the unit support continuous operation over extended periods?
Rated for intermittent duty (S3-40% ED); continuous operation beyond 60 minutes requires active airflow cooling and speed limitation to ≤6000 rpm to sustain thermal stability.
Are replacement dispersing discs available in custom geometries?
Standard 50 mm and 60 mm serrated discs are stocked; custom disc profiles (e.g., anchor, sawtooth, or high-efficiency turbine) can be fabricated upon technical specification submission and MOQ agreement.
