The SZG Series Double Cone Rotary Vacuum Dryer is a cutting‑edge drying solution designed for the pharmaceutical, chemical, and food industries. By combining gentle tumbling action with a high‑vacuum environment, this industrial vacuum drying machine effectively removes moisture and solvents from heat‑sensitive, oxidizable, or toxic materials without degrading product quality.
A Rotary Vacuum Dryer is a batch‑processing machine consisting of a jacketed, double‑conical vessel that rotates slowly. Under a vacuum state, the jacket is filled with a heating medium (steam, hot water, or thermal oil). The heat is transferred to the material through the inner shell while the continuous rotation ensures uniform mixing and drying. This design prevents material contamination and meets GMP standards, making it ideal for sterile and sensitive applications.
Low‑Temperature Drying: Operates at temperatures from 20°C to 160°C, perfect for heat‑sensitive biochemical and pharmaceutical products.
Solvent Recovery System: Equipped with a condenser and receiver, the system allows for efficient recovery of volatile solvents, reducing waste and operational costs.
High Thermal Efficiency: The indirect heating method achieves thermal efficiency more than twice that of ordinary drying ovens.
GMP‑Compliant Design: All contact parts can be made of AISI 316/316L stainless steel, ensuring a non‑contaminated, sanitary drying process.
Reduced Oxidation Risk: The vacuum environment prevents oxidation and degradation of sensitive materials.
Automatic Operation: Options for PLC control and HMI touch screens allow for precise, automated process management.
| Model | Total Volume (L) | Loading Volume (L) | Heating Area (m²) | Motor Power (kW) | Rotating Speed (rpm) | Overall Weight (kg) |
| SZG-100 | 100 | ≤50 | 1.16 | 0.75 | 4‑6 | 800 |
| SZG-350 | 350 | ≤175 | 2.00 | 1.1 | 4‑6 | 1100 |
| SZG-500 | 500 | ≤250 | 2.63 | 1.5 | 4‑6 | 1200 |
| SZG-1000 | 1000 | ≤500 | 4.61 | 3.0 | 4‑6 | 2800 |
| SZG-2000 | 2000 | ≤1000 | 7.50 | 4.0 | 4‑6 | 3600 |
| SZG-5000 | 5000 | ≤2500 | 14.10 | 11.0 | 4‑6 | 8600 |
Note: Technical data based on SZG series standards from leading manufacturers. Customization is available upon request.
The working principle of the double cone rotary vacuum dryer follows a simple yet effective cycle:
Heating: Heating medium circulates through the jacket surrounding the vessel.
Tumbling Action: The vessel rotates at a low speed (typically 4‑6 RPM), continuously mixing the material.
Vacuum Evaporation: The vacuum pump reduces the internal pressure, lowering the boiling point of moisture or solvents.
Drying & Recovery: Moisture evaporates and is pumped out, while solvents are condensed and recovered in a separate receiver tank.
This vacuum drying equipment is suitable for a wide range of materials:
Pharmaceutical: APIs, intermediates, excipients, and biological products.
Chemical: Pigments, dyes, fine chemicals, and catalysts.
Food: Food additives, flavors, and heat‑sensitive ingredients.
Special Materials: Materials that are easily oxidized, explosive, or highly toxic.
We understand that each application is unique. We offer extensive customization, including:
Heating Media: Steam, hot water, or thermal oil.
Control Systems: PLC with HMI touch screen for automatic temperature and speed control.
Sealing Technology: Advanced mechanical seals and rotary joints for maintaining deep vacuum.
Material Options: Contact parts in SS304 or SS316L.
Proven Reliability: The design ensures the perfect concentricity of shafts, guaranteeing stable long‑term operation.
Global Certifications: Products comply with international standards, with CE and SGS certifications available.
24/7 Support: Dedicated after‑sales service and technical support to ensure your production runs smoothly.
What industries use a Rotary Vacuum Dryer?
It is widely used in the pharmaceutical, chemical, and food processing industries for drying heat‑sensitive and easily oxidized materials.
Can the dryer recover solvents?
Yes, the system can be equipped with a condenser and receiver to efficiently recover solvents, which is a major advantage for chemical processing.
What is the loading capacity?
The loading capacity is typically 40% to 60% of the total volume. For example, a 500L model can load up to 250kg of material.
How long does it take to dry material?
Drying time varies depending on the material's moisture content and temperature sensitivity. The vacuum and tumbling action significantly speed up the process compared to traditional methods.
Is the dryer easy to clean?
Yes. The GMP design features polished internals and is easy to maintain and clean.
What are the payment terms?
Standard terms are typically 30% T/T in advance and 70% before shipment, but terms are negotiable.
Ready to optimize your drying process? Contact our team today for a customized solution tailored to your specific material and capacity requirements.
Address:China,Yanjin county forest park gate to the west 1000 meters north road.
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