Vacuum Drying Oven
Drying Equipment
1. Product Overview
The vacuum drying oven is a cabinet-type unit that dries material gently at low temperature under vacuum, which lowers the boiling point of moisture. It consists of the chamber, a heating system (electric heaters or steam coils), a vacuum system, temperature control and a control cabinet. Typical duties: heat-sensitive materials, oxidation-prone chemicals, pharmaceutical intermediates and electronic components. Key features: low drying temperature, uniform heating, no cross-contamination, and condensate recovery of flammable solvents.
2. Working Principle
Wet material is spread evenly on trays, which are loaded onto the heated shelves inside the chamber. With the door closed, the vacuum system evacuates the chamber. Heat is conducted from the shelves into the material, and under negative pressure the moisture or solvent vaporizes at low temperature. The vapor is drawn off by the vacuum pump and recovered in the condenser, while non-condensable gases are vented.
3. System Classification
By Heating Method:
Electrically heated vacuum oven: heating elements built into the shelves; fast heat-up and precise temperature control / Laboratories and sites without a steam supply
Steam heated vacuum oven: steam or hot water circulated through the shelves; low operating cost / Large-scale industrial production
Thermal oil heated vacuum oven: high-temperature heating (above 200℃) / Duties requiring high temperature and stable temperature control
4. Detailed Technical Parameters
4.1 Common Materials
| Material | Applicable Components/Media | Remarks |
|---|---|---|
| 304 Stainless Steel | Inner chamber, trays, shelves | Corrosion-resistant, easy to clean, GMP compliant |
| 316L Stainless Steel | Strongly corrosive solvents, high-purity materials | Excellent corrosion resistance |
| Carbon Steel Q235B | Outer shell, frame | External anti-corrosion coating, low cost |
4.2 Typical Specification Table
| Effective Volume (L) | Shelf Layers | Shelf Temp (℃) | Vacuum Level | Heating Power |
|---|---|---|---|---|
| 25～100 | 3～6 | Room temp～200 | ≤-0.096MPa | 3～6kW |
| 100～500 | 6～10 | Room temp～200 | ≤-0.096MPa | 6～18kW |
| 500～2000 | 10～16 | Room temp～200 | ≤-0.096MPa | 18～45kW |
4.3 Design Conditions & Performance
| Parameter | Specification |
|---|---|
| Temperature Uniformity | ≤±2℃ (steady state) |
| Vacuum Level | Ultimate vacuum ≤-0.096MPa |
| Heating Rate | 1～3℃/min (no-load) |
| Solvent Recovery Rate | ≥85% (with condenser) |
5. Electrical Parameters
| Region | Voltage | Frequency |
|---|---|---|
| China/Russia/Central Asia | 380V | 50Hz |
| Middle East/Southeast Asia/Africa | 400V / 415V | 50Hz |
| South Korea | 380V | 60Hz |
| Americas (if required) | 440V / 480V | 60Hz |
| Note: Electric heating tubes and vacuum pumps must have specified voltage/frequency; explosion-proof motors required for flammable solvents. |
6. Core Component Selection
| Component | Brand/Material | Features & Applications |
|---|---|---|
| Chamber / Inner Liner | Machined to order | 304/316L, fully welded and polished, crevice-free |
| Vacuum Pump | Leybold / Chinese brands | Water-ring, rotary-vane or dry screw pump, selected to suit the solvent |
| Condenser | Custom matched | Shell-and-tube or coil type, efficient recovery of organic solvents |
| Door Seal | Custom matched | Silicone or FKM, resistant to high and low temperatures, excellent sealing |
7. Typical Application Fields
Pharmaceutical Industry: TCM extracts, API low-temp drying
Chemical Industry: Easily oxidizable chemicals, solvent recovery drying
Electronics Industry: Capacitors, component dehydration
Food Industry: drying of heat-sensitive ingredients for health products
8. Design Standards & Certifications
| Standard | Description |
|---|---|
| GB/T 29251-2012 | Vacuum drying ovens |
| ISO 9001:2015 | Quality Management System |
| GMP | Good Manufacturing Practice (for pharma grade) |
| CE / EAC / GOST-R | Available upon request for international orders |
9. Custom Optional Configurations
| Option | Details |
|---|---|
| Heating Method | Electric / Steam / Thermal oil |
| Control System | Button digital display / PLC + touch screen, auto temp & vacuum control |
| Tray Material | 304/316L perforated or solid stainless steel trays |
| Special Design | Explosion-proof / N2 protection / Water ring pump + condensation unit |
10. Warranty Terms
| Equipment Status | Warranty Period | Warranty Scope |
|---|---|---|
| Brand New | 12 months | Chamber structure, heating system, vacuum and sealing systems |
| Refurbished | 6 months | Chamber structure, heating system, vacuum and sealing systems |
| Idle | 3 months | Main functional components |
11. Packaging & Delivery
| Item | Packaging Method |
|---|---|
| Main Chamber | Tarpaulin wrapped, wooden skid base |
| Trays / Valves | Fully enclosed wooden cases |
| Electrical / Vacuum Pump | Waterproof sealed packaging in wooden cases |
| Container shipping. On-site installation and commissioning guidance available. |
12. Information Required for Inquiry
12. Information Required for Inquiry Material name, initial/final moisture content; material form (powder/paste/block); batch capacity or required volume; drying temperature limits; solvent type (water/organic); equipment status preference (new/refurbished/idle); delivery terms (FOB/CIF/DDP); destination port.