SZG Series
SZG Conical Vacuum Dryer
Double-cone rotary vacuum dryer for low-temperature drying of heat-sensitive, oxidation-prone, and solvent-laden materials.
- Belt-drive and chain-drive connection options
- Dual rotary joints for reliable vacuum sealing
- SZG-A variant with stepless speed regulation
- Optional solvent recovery process
Drying Equipment13
Standard Models
100-5000 L
Total Volume Range
1.1-15 kW
Motor Power Range
Specifications
Technical parameters
| Model | Total Volume (L) | Diameter D (mm) | Height H (mm) | H1 (mm) | H2 (mm) | Length L (mm) | M (mm) | Max Material Feed (kg) | Motor Power (kW) | Total Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|
| SZG-0.1 | 100 | Φ800 | 1640 | 1080 | 785 | 1595 | 640 | 50 | 1.1 | 650 |
| SZG-0.2 | 200 | Φ900 | 1890 | 1160 | 930 | 1790 | 700 | 80 | 1.5 | 900 |
| SZG-0.3 | 300 | Φ1000 | 2000 | 1320 | 1126 | 2100 | 800 | 120 | 1.5 | 1200 |
| SZG-0.5 | 500 | Φ1100 | 2360 | 1400 | 1280 | 2390 | 1000 | 200 | 2.2 | 1450 |
| SZG-0.8 | 800 | Φ1200 | 2500 | 1500 | 1543 | 2390 | 1000 | 300 | 2.2 | 1700 |
| SZG-1 | 1000 | Φ1250 | 2500 | 1700 | 1700 | 2600 | 1150 | 400 | 3 | 2800 |
| SZG-1.5 | 1500 | Φ1350 | 2600 | 1762 | 1750 | 3480 | 1200 | 600 | 4 | 3300 |
| SZG-2 | 2000 | Φ1500 | 2700 | 1780 | 1800 | 3600 | 1200 | 800 | 5.5 | 3580 |
| SZG-2.5 | 2500 | Φ1600 | 2850 | 1810 | 1870 | 3700 | 1200 | 1000 | 5.5 | 4250 |
| SZG-3 | 3000 | Φ1800 | 3200 | 2100 | 2590 | 3800 | 1500 | 1200 | 7.5 | 5500 |
| SZG-4.0 | 4000 | Φ1900 | 3850 | 2350 | 2430 | 4350 | 2200 | 1600 | 11 | 6800 |
| SZG-4.5 | 4500 | Φ1950 | 3910 | 2420 | 2510 | 4450 | 2350 | 1800 | 11 | 7900 |
| SZG-5.0 | 5000 | Φ2000 | 4225 | 2510 | 2580 | 4600 | 2500 | 2000 | 15 | 8800 |
Loading coefficient: 0.4-0.6. Specifications subject to change without notice.
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View specificationsEngineering Advantages
Built for demanding vacuum drying duty
High Thermal Efficiency
Thermal efficiency runs roughly 2x higher than ordinary ovens, shortening drying cycles and lowering energy cost per batch.
Constant-Temperature Heating
Automatic constant-temperature oil heating dries biochemical products and mineral raw materials across a 20-160°C range.
Uncontaminated Drying
Indirect heating through the jacket keeps material out of contact with combustion gases or carrier air, supporting GMP-oriented processes.
Solvent Recovery Ready
Vapor drawn off under vacuum can be routed to a condenser for solvent recovery, reducing raw material loss on solvent-wet feedstocks.
Stepless Speed Regulation
The SZG-A variant adds stepless speed regulation, letting operators fine-tune tank rotation for delicate or fast-tumbling materials.
Easy Operation and Cleaning
A straightforward double-cone geometry and accessible discharge port simplify routine operation, cleandown, and product changeover.
Reliable Rotary Joints
Two dedicated rotary joints maintain a stable vacuum seal at the rotating tank connection throughout the drying cycle.
Thirteen Standard Sizes
Total volumes from 100 L to 5000 L across thirteen standard models make it straightforward to match capacity to batch size.
Working Principle
The vacuum rake drying cycle
- STEP 01
Charge Material
Wet powdery, granular, or fibrous material is loaded into the double-cone tank through the sealed feed port.
- STEP 02
Seal & Evacuate
The tank is sealed and the vacuum system draws down chamber pressure, lowering the boiling point of surface moisture.
- STEP 03
Constant-Temperature Heating
Hot water, low-pressure steam, or thermal oil circulates through the jacket, conducting heat through the inner shell at a controlled 20-160°C.
- STEP 04
Slow Tank Rotation
The tank rotates slowly under power drive, continuously tumbling and mixing material for enhanced, uniform drying.
- STEP 05
Vapor Extraction & Recovery
Evaporated moisture or solvent is drawn out through the dual rotary joints by the vacuum pump and condensed for recovery where required.
- STEP 06
Discharge Product
Once target moisture is reached, the tank is positioned to its discharge angle and the dried product is released.
Structure Diagram
Inside the SZG conical vacuum dryer
Front view (top) showing overall height H, H1, H2, tank diameter D, base length L, and vacuum gauge and thermometer at the drive end; end view (bottom) showing motor centerline width M.
Key Components
- Vacuum Gauge
- Thermometer
- Drive Assembly
- Double-Cone Vessel
System Flow Diagram
Vacuum drying system flow: hot water supply and pipe pump, jacketed drier, filter and discharge valve, condenser, buffer tank, and vacuum pump.
Application Industries
Industries relying on the ZPG series
Fine & Specialty Chemical
- Concentration and mixing of powdery, granular, and fibrous materials
- Easily oxidized or volatile chemical intermediates
- Materials where crystal structure must not be disturbed
Sealed vacuum operation limits oxidation and solvent loss during processing.
Pharmaceutical & Biochemical
- Low-temperature drying of heat-sensitive biochemical products
- Strongly irritating or toxic intermediate handling
- Enclosed tank limiting cross-contamination
GMP-oriented configuration available; confirm documentation requirements with our engineers before specifying for regulated production.
Mineral & Food Processing
- Mineral raw material drying at controlled temperature
- Food-grade powder and granule drying
- Batch traceability across standard model sizes
Why Choose Ruibo
Reasons processors specify Ruibo
Roughly 2x Thermal Efficiency
Conductive jacket heating delivers thermal efficiency roughly double that of ordinary hot-air ovens, cutting energy use per batch.
Contamination Control
The sealed double-cone tank isolates material from ambient air and combustion gases, protecting purity for GMP-oriented processes.
Optional Stepless Speed Control
The SZG-A variant lets you dial in tank rotation speed to match the tumbling characteristics of delicate or free-flowing materials.
Easy to Operate and Clean
A simple double-cone geometry and accessible discharge port keep routine operation, cleandown, and changeover straightforward.
Scales With Your Process
Total volumes from 100 L to 5000 L across thirteen standard models make it straightforward to match capacity to production demand.
Solvent Recovery Ready
An optional solvent recovery process condenses vapor drawn off under vacuum, reducing raw material loss on solvent-wet feedstocks.
Materials Handled
FAQ
Common questions about the ZPG series
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