DRETOP FS-750 High-Speed Disperser & Stirrer

Overview

The DRETOP FS-750 High-Speed Disperser & Stirrer is an engineered laboratory-scale mixing and dispersion system designed for reproducible, high-shear processing of heterogeneous suspensions, pastes, and viscous emulsions. Based on the Couette–Taylor flow principle, it utilizes a rotating circular-toothed dispersing disc to generate intense radial shear forces and controlled turbulent vortex flow within the sample vessel. This hydrodynamic configuration ensures effective particle deagglomeration, wetting of solid surfaces, and uniform distribution of dispersed phases—critical for formulation development in R&D labs across coatings, nanomaterials, pharmaceuticals, and specialty chemicals. Unlike basic magnetic stirrers or low-shear overhead mixers, the FS-750 delivers scalable process conditions relevant to pilot-line optimization, with precise speed control enabling systematic study of shear-dependent rheological behavior.

Key Features

• Brushless frequency-controlled AC motor (750 W) delivering stable torque output across the full 0–9999 rpm range, with minimal thermal drift and extended service life
• Digital LED display with multi-turn precision potentiometer for real-time rpm readout and repeatable setpoint recall
• Manually operated vertical column with 200 mm lift travel, accommodating standard cylindrical containers up to 5 L volume
• Interchangeable dispersing discs (standard: Ø50 mm and Ø60 mm, circular saw-tooth geometry) optimized for laminar-to-turbulent transition and axial recirculation
• Robust aluminum alloy housing and stainless-steel drive shaft assembly compliant with IP54 ingress protection rating
• No integrated heating/cooling jacket—designed for ambient-temperature operation; compatible with external thermostatic baths via double-jacketed vessel options (sold separately)

Sample Compatibility & Compliance

The FS-750 accommodates a broad spectrum of non-corrosive and mildly abrasive formulations, including aqueous and solvent-based pigment dispersions, polymer latexes, graphene oxide slurries, pharmaceutical suspensions, and adhesive pre-blends. Its mechanical design adheres to IEC 61000-6-2 (electromagnetic immunity) and IEC 61000-6-4 (emission) standards. While not certified for Class I Div 1 hazardous locations, optional ATEX-compliant explosion-proof variants (FS-750-EX) are available upon request for use with flammable solvents. The system supports GLP-aligned documentation workflows when paired with external audit-trail-capable data loggers, though native 21 CFR Part 11 compliance requires third-party software integration.

Software & Data Management

The FS-750 operates as a stand-alone analog-controlled instrument without embedded firmware or USB/RS-232 interfaces. All operational parameters—including speed setpoint, runtime, and manual lift position—are recorded manually or via external digital tachometers and process timers. For traceable batch records, users commonly integrate the unit into validated lab networks using calibrated handheld RPM meters (e.g., Extech 461923) and time-stamped video logging. DRETOP provides English-language operating manuals, mechanical maintenance guides, and spare parts catalogs—including dispersing disc replacements, O-ring kits, and drive coupling assemblies—all traceable by serial number.

Applications

• Preparation of stable pigment dispersions for waterborne and solventborne coatings R&D
• Exfoliation-assisted dispersion of 2D nanomaterials (e.g., graphene, MXenes) in polymeric matrices
• Homogenization of high-viscosity adhesives and sealants prior to rheological or tensile testing
• Wetting and deagglomeration of ceramic powders in battery slurry development
• Emulsion stabilization trials for cosmetic formulations containing waxes, oils, and surfactants
• QC screening of lot-to-lot consistency in pharmaceutical suspension concentrates (USP )

FAQ

Does the FS-750 include temperature control?
No. The FS-750 is a non-thermostatic disperser. Temperature-sensitive processes require external thermal management using double-jacketed vessels connected to circulating chillers or heaters.
What safety certifications does the unit carry?
It complies with CE marking requirements under the Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU. Electrical safety testing follows EN 60335-1 and EN 61000 series standards.
Can the FS-750 be used with explosive or highly flammable solvents?
Only with the optional ATEX-certified explosion-proof motor kit (FS-750-EX), installed and commissioned by authorized DRETOP service personnel.
Is speed calibration traceable to national standards?
Yes—DRETOP provides factory calibration certificates (NIST-traceable tachometer verification) upon request at additional cost. Annual recalibration is recommended for GMP environments.
What maintenance intervals are specified for the brushless motor?
No scheduled motor servicing is required; however, biannual inspection of shaft runout, dispersing disc fasteners, and bearing preload is advised per the Maintenance Schedule (Section 4.2 of User Manual Rev. 3.1).