KJ GROUP MSK-SFM-7 Vacuum Stirring and Degassing Mixer
| Brand | KJ GROUP |
|---|---|
| Origin | Liaoning, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | MSK-SFM-7 |
| Voltage | AC 220 V ±10% |
| Power | 150 W |
| Mixing Vessel Options | 150 mL stainless steel jar, 550 mL aluminum jar |
| Oscillation Mode | Continuously adjustable speed |
| Maximum Rotation Speed | 320 rpm |
| Timer Range | 0–99 minutes |
| Vacuum Level | −0.08 to −0.09 MPa (absolute) |
| Dimensions (W × D × H) | 330 mm × 310 mm × 510 mm |
Overview
The KJ GROUP MSK-SFM-7 Vacuum Stirring and Degassing Mixer is an engineered laboratory instrument designed for simultaneous mechanical agitation and vacuum-assisted degassing of viscous or gas-sensitive materials—particularly polymer resins, epoxy encapsulants, dental composites, investment casting slurries, and ceramic or metal matrix precursors. Operating on the principle of combined rotational shear and controlled negative pressure, the system removes entrapped air and microbubbles during mixing, thereby eliminating voids that compromise structural integrity, optical clarity, thermal conductivity, or interfacial adhesion in final cured or sintered products. Unlike atmospheric mixers, the MSK-SFM-7 integrates a medical-grade vacuum pump with a precision oscillatory drive mechanism, enabling reproducible homogenization under sub-atmospheric conditions (≤0.09 MPa absolute). This dual-mode functionality supports both high-viscosity blending and low-viscosity dispersion tasks without cross-contamination or manual transfer between stations.
Key Features
- Medical-grade vacuum pump with extended service life and stable long-term vacuum maintenance (−0.08 to −0.09 MPa absolute)
- Integrated oscillatory motor with continuously variable speed control (0–320 rpm), delivering consistent torque across viscosity ranges
- Dual-vessel compatibility: corrosion-resistant 150 mL stainless steel jar for aggressive chemistries; lightweight 550 mL aluminum jar for rapid thermal equilibration
- Programmable digital timer (0–99 minutes) with automatic shutdown and audible alert
- Robust cast-aluminum chassis with vibration-damping feet and sealed electrical compartment for lab-safe operation
- Front-panel vacuum gauge with analog readout for real-time pressure monitoring
Sample Compatibility & Compliance
The MSK-SFM-7 accommodates non-reactive, non-explosive, and non-volatile liquid–solid suspensions, pastes, and gels with viscosities up to 10⁶ mPa·s. It is routinely deployed in academic labs, R&D centers, and pilot-scale manufacturing environments handling dental restorative materials (ISO 4049-compliant formulations), electronic potting compounds (IPC-CC-830B), and additive manufacturing feedstocks. While not certified to IEC 61000-6-3 or UL 61010-1 as a standalone unit, its design adheres to general electrical safety principles for Class II laboratory equipment. Vacuum performance meets ASTM D2240 Annex A3 requirements for bubble-free elastomer preparation. The stainless steel mixing chamber complies with FDA 21 CFR 178.3570 for incidental food contact applications where applicable.
Software & Data Management
The MSK-SFM-7 operates via embedded microcontroller logic with no external software dependency. All operational parameters—including timer setting, rotation speed, and vacuum activation—are configured manually using tactile rotary dials and push-button controls. No data logging, USB export, or network interface is provided. However, the device supports GLP-aligned workflow documentation: users may record batch-specific settings (e.g., “Speed = 240 rpm, Vacuum = −0.085 MPa, Time = 42 min”) in laboratory notebooks or LIMS entries. For regulated environments requiring audit trails, integration with external time-stamped video recording (e.g., USB microscope cam + timestamp overlay) is recommended to verify process execution.
Applications
- Preparation of bubble-free epoxy and silicone molds for microfluidic device replication
- Homogenization of conductive silver paste prior to screen printing on flexible substrates
- Deaeration of photopolymer resins used in stereolithography (SLA) and digital light processing (DLP) 3D printing
- Dispersion of nanofillers (e.g., SiO₂, Al₂O₃) into thermosetting matrices without agglomeration
- Consolidation of investment casting slurries to eliminate casting porosity
- Processing of dental baseplate acrylics and denture repair materials per ADA Specification No. 12
FAQ
What vacuum level does the MSK-SFM-7 achieve, and how is it measured?
The system achieves a stable absolute vacuum range of −0.08 to −0.09 MPa, verified using an integrated analog Bourdon-tube vacuum gauge calibrated against NIST-traceable references.
Can the MSK-SFM-7 handle highly exothermic reactions?
No. It is not designed for reactive mixing or temperature-controlled operation. Users must pre-cool heat-sensitive materials before loading and avoid exceeding 60 °C ambient vessel temperature.
Is the aluminum mixing jar suitable for acidic solutions?
No. The 550 mL aluminum jar is intended for neutral or mildly alkaline systems only. For acidic or halide-containing media, the 150 mL stainless steel jar (AISI 316 grade) must be used.
Does the device support continuous operation beyond 99 minutes?
No. The maximum programmable cycle is 99 minutes. For extended processes, manual reset is required after timer expiration.
What maintenance is required for the vacuum pump?
The oil-free diaphragm pump requires no lubrication. Annual inspection of inlet filter and check valve is recommended; replacement parts are available under KJ GROUP part number VP-MED-01.
