Vacuum furnaces are advanced thermal processing systems designed for high-temperature applications in oxygen-free environments. Their unique design and capabilities make them indispensable in industries requiring precise control over material properties. Below are the critical specifications and considerations for vacuum furnaces:
Maximum Temperature and Heating Elements
The maximum operating temperature of a vacuum furnace varies depending on the heating elements and furnace construction. Common ranges include:
- Heating tubes – 1000℃
- Heating wires – 1200℃
- Molybdenum strap heaters – 1350℃
- SiC heating elements – 1400℃
- MoSi heating elements – 1700℃
- Graphite heating element – 2200℃
- Induction Coil – if you need fast induction melting
Furnace Chamber Materials
The vacuum furnace chamber must withstand extreme temperatures and thermal cycling. Common materials include:
- Stainless steel – 1000℃
- Ceramic fiber board – 1200℃
- Molybdenum sheets – 1350℃
- Ceramic fiber board – 1400℃
- Ceramic fiber board – 1700℃
- Graphite and Carbon felt – 2200℃
Vacuum system
The vacuum system consists of a vacuum valve, mechanical pump, diffusion pump, and roots pump according to the required vacuum level.
Vacuum Levels:
- Low vacuum: normally -0.1MPa Max.
- High vacuum: 7×10-4 Pa Max.
Chamber Size and Configuration
Standard chamber dimensions vary based on industrial needs:
- Laboratory scale: Small size within 500x500x500mm.
- Industrial scale: Large size up to 2000mm. Custom designs are available for large production.
Cooling Systems
- Gas quenching or Oil quenching: If you need fast cooling.
- Water-cooled jackets: Integrated into the chamber walls for continuous operation.
Control and Monitoring
• Temperature measurement： Different types of thermocouples are used for measuring different temperatures.
• Temperature controllers: PID, PLC, or touch screen programmable auto control and data logging.
A Vacuum Furnace Specifications like the below:
Technical Specifications |
|
| Max. temperature | 1200℃ (Heating wires)1350℃ (Molybdenum strap heaters ) 1400℃ (SiC heating elements) 1700℃ (MoSi heating elements) 2200℃ (Graphite heating element) |
| Furnace chamber insulation | 1200℃ (Ceramic fiber board)1350℃ (Molybdenum sheets and Stainless steel sheets ) 1400℃ (Ceramic fiber board) 1700℃ (Ceramic fiber board) 2200℃ (Carbon felt) |
| Furnace structure | ●Double layers Carbon steel casing with water cooling system to ensure the surface below 30℃● Furnace door inside is polished stainless steel |
| Working voltage | 380V 50HZ 3P (or according to your standard) |
| Max. power | 5KW–180KW |
| Temperature controlling | ● PLC or PID automatic control via SCR (Silicon Controlled Rectifier) power control with phase angle fired, current limiting resistor. ● 51 programmable segments for precise control of heating rate, cooling rate and dwell time. ● Built in PID Auto-Tune function with overheating & thermocouple broken protection. ● Over temperature protection and alarm allow for operation without an attendant. |
| Optional of temperature controlling | ● Software (Furnace can be operated by PC by installing a control software ) ● Touch screen temperature controller |
| Temperature accuracy | ±1℃ |
| Heating rate | Heating rate<20 ℃/min |
| Thermocouple | 1200℃ (S type)1350℃ (S type) 1700℃ (B type) 2200℃ (W-Re type) |
| Maximum vacuum | 7×10-4Pa |
| Vacuum pump | ● 10Pa with Double stages rotary pump● 7×10-1Pa with Mechanical pump and Roots pump ●7×10-3Pa with Mechanical pump and Diffusion pump ●7×10-4Pa with Mechanical pump and Molecular pump |
Key Applications
Vacuum furnaces are utilized in:
- Aerospace: Heat treatment of turbine blades and titanium alloys.
- Medical devices: Sterilization and sintering of surgical implants.
- Semiconductors: Diffusion processes and wafer annealing.
- Additive manufacturing: Post-processing of 3D-printed metal parts, and other metal parts.
- Research: Material synthesis under controlled atmospheres.
Conclusion
Selecting a vacuum furnace requires careful evaluation of temperature needs, material compatibility, and process goals. Advances in refractory materials and digital controls continue to expand their capabilities in precision manufacturing and advanced material science. For specialized applications, consult us to optimize chamber geometry, pumping systems, and thermal profiles.
If you need a quote or have any questions, please don’t hesitate to contact us.
Vacuum Furnace Standard Size as below: (other sizes can be customized)
Vacuum Furnace up to 1200℃
| Model | Max Temp. | Chamber size (WxHxD) |
Heating element | Capacity (L) |
Power (KW) |
Vacuum |
| BR-12HVF-1 | 1200 | 100*100*100 | Resistance wire | 1 | 1.2 | 7×10-3Pa |
| BR-12HVF-5 | 1200 | 150*150*200 | Resistance wire | 4.5 | 3.5 | |
| BR-12HVF-12 | 1200 | 200*200*300 | Resistance wire | 12 | 5 | |
| BR-12HVF-36 | 1200 | 300*300*400 | Resistance wire | 36 | 12 | |
| BR-12HVF-64 | 1200 | 400*400*600 | Resistance wire | 96 | 24 | |
| BR-12HVF-125 | 1200 | 500*500*700 | Resistance wire | 175 | 36 | |
| BR-12HVF-216 | 1200 | 600*600*900 | Resistance wire | 324 | 56 |
Vacuum Furnace up to 1350℃
|
Model |
Chamber size |
Temp. |
Power（KW) |
Voltage |
Max.Vacuum |
|
BR-QHM-223 |
200*200*300 |
1350℃ |
42 |
380V |
7×10-4 Pa |
|
BR-QHM-334 |
300*300*400 |
1350℃ |
72 |
380V |
|
|
BR-QHM-446 |
400*400*600 |
1350℃ |
120 |
380V |
|
|
BR-QHM-557 |
500*500*700 |
1350℃ |
160 |
380V |
|
|
BR-QHM-669 |
600*600*900 |
1350℃ |
225 |
380V |
Vacuum Furnace up to 1700℃
|
Model |
Max Temp. (℃) |
Chamber size |
Heating element |
Capacity |
Power |
Max. Vacuum |
|
BR-17VF-1 |
1700 |
100*100*100 |
MoSi2 heater |
1 |
1.5 |
7×10-3 Pa (7×10-5 mbar) |
|
BR-17VF-5 |
1700 |
150*150*200 |
MoSi2 heater |
4.5 |
5 |
|
|
BR-17VF-12 |
1700 |
200*200*300 |
MoSi2 heater |
12 |
8 |
|
|
BR-17VF-36 |
1700 |
300*300*400 |
MoSi2 heater |
36 |
12 |
|
|
BR-17VF-80 |
1700 |
400*400*600 |
MoSi2 heater |
96 |
30 |
|
|
BR-17VF-175 |
1700 |
500*500*700 |
MoSi2 heater |
175 |
45 |
|
|
BR-17VF-324 |
1700 |
600*600*900 |
MoSi2 heater |
324 |
70 |
Vacuum Furnace up to 2200℃
|
Model |
Heating Zone (Dia.* Height) |
Temperature |
Power |
Voltage |
Max. Vacuum |
|
BR-22STV-20 |
Φ80×100mm |
2200℃ |
20kW |
380V |
7×10-3 Pa (7×10-5 mbar) |
|
BR-22STV-25 |
Φ90×120mm |
2200℃ |
25kW |
380V |
|
|
BR-22STV-40 |
Φ140×160mm |
2200℃ |
40kW |
380V |
|
|
BR-22STV-50 |
Φ160×200mm |
2200℃ |
50kW |
380V |
|
|
BR-22STV-60 |
Φ260×270mm |
2200℃ |
60kW |
380V |
|
|
BR-22STV-100 |
Φ320×320mm |
2200℃ |
100kW |
380V |
See More Vacuum Furnaces:
- Vacuum Sintering Furnace
- Vacuum Brazing Furnace
- Graphite Vacuum Furnace
- Vacuum Induction Melting Furnace
- Vacuum Gas Quenching Furnace
- Vacuum Hot Press Furnace
- Vacuum Tungsten Coil Furnace
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