VBF-800X-HV Vacuum Chamber Furnace with 1000°C Quartz Chamber and Dual Heating Zones for Precise Annealing and Brazing
The VBF-800X-HV is engineered to meet the demands of laboratory vacuum annealing, brazing, and sintering processes where precise temperature control and a clean environment are critical. This top-loading vacuum furnace accommodates either a stainless steel or quartz vacuum chamber, enabling flexibility depending on the thermal and chemical requirements of the application. The quartz chamber option supports operation up to 1000°C, while the stainless steel chamber is rated for temperatures up to 800°C.
Uniform heating is achieved through two independently controlled zones—bottom and side heating elements—ensuring consistent temperature distribution within the working chamber. The furnace employs a quartz thermal block to maintain a clean annealing atmosphere, minimizing contamination risks. Temperature is precisely regulated with dual Eurotherm PID controllers, delivering ±0.1°C accuracy and programmable temperature segments for complex thermal profiles.
Key Features
- Choice of vacuum chambers: Ø200 mm ID × 350 mm height stainless steel or quartz for high-temperature applications
- Dual heating zones (bottom and side) for uniform temperature control within the chamber
- Temperature control accuracy of ±0.1°C with two Eurotherm PID controllers and 28 programmable segments
- Quartz thermal block ensures a clean, well-defined annealing environment
- Ultimate vacuum levels of ≤7×10⁻⁷ torr (stainless steel chamber) and ≤7×10⁻⁶ torr (quartz chamber)
- DN63 port for direct turbopump connection to achieve high vacuum
- Chilled water cooling system with recommended flow rates for efficient heat dissipation
Technical Specifications
| Parameter | Specification |
|---|---|
| Power Supply | 208 – 240 VAC, 50/60 Hz, 50 A, 8 kW (10-ft power cord without plug) |
| Ultimate Vacuum | ≤ 7×10⁻⁷ torr (stainless steel chamber), ≤ 7×10⁻⁶ torr (quartz chamber) |
| Maximum Working Temperature | 800°C (stainless steel chamber), 1000°C (quartz chamber) |
| Heating Rate | Up to 10°C/min |
| Heating Area | Dual zones: ID 250 × H 350 mm (175 + 175 mm) |
| Effective Heating Volume | Ø200 × H 350 mm maximum sample size |
| Reaction Vessel Materials and Dimensions | SS310: Ø216×Ø206×600 mm H, DN200CF flange; Quartz: Ø216×Ø206×600 mm H, DN200 ISO-K flange |
| Thermocouple Type | Type K |
| Heating Elements | NiCrAl: Mo |
| Thermal Block | Quartz Ø204×158 mm |
| Temperature Controller | Two EPC3004 Eurotherm PID controllers, 28 temperature segments, ±0.1°C accuracy, RS485 communication |
| Cooling Water Requirements | Two Ø12 mm push-to-connect inlets/outlets; 1500–2500 BTU/h cooling capacity; 5–15 L/min flow recommended |
| Compliance | CE Certified; NRTL or CSA certification available upon request |
Typical Applications
The VBF-800X-HV is ideal for vacuum annealing of metals and alloys, brazing delicate components, and sintering advanced materials requiring contamination-free, high-vacuum environments. Its precise temperature control and uniform heating zones support repeatable thermal processing in research and development laboratories.
Configuration & Operating Notes
The furnace includes a DN63 port for direct turbopump connection to achieve ultra-high vacuum levels. Cooling water connections require a flow rate between 5 and 15 liters per minute to maintain optimal thermal management. Users must ensure the chamber pressure does not exceed ambient pressure; operation under positive pressure is strictly prohibited to maintain safety and equipment integrity.
Optional accessories such as turbo pumps, water chillers, quartz blocks, and copper gaskets can be integrated to enhance performance based on specific application needs.
