VBF-1200X-E8 is a vacuum-sealed furnace with a motor-driven bottom loading sample stage and an electric door for thermal insulation of the heated chamber. The furnace comes with a quartz chamber of 8.5" ID x 13.4"H and a water-cooled flange, which enables heat treatment under a vacuum or controlled atmosphere. A gas blow system is installed at the bottom to cool the heated sample faster with inert gas.
SPECIFICATIONS
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Features
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- Double-layer steel casing with air cooling keeps furnace surface < 60°C
- Water-cooled vacuum flange for better vacuum seal and longer service life
- 8.5" ID Quartz chamber works under both vacuum and gas flow.
- Motor-driven bottom loading for large sample loading at ease.
- The electric sliding door is built to block thermal radiation when heated sample loading down
- Inert gas blow system is installed to quench heated samples faster
- Two precision temperature controllers are included: one for furnace temperature and another for a monitoring temperature change of the sample stage
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Power
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- 208-240 VAC, 1 ph, 50/60 Hz.
- 3600 W (20 A power receptacle is required)
- A 10-foot power cable is included but without a plug
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Working Temperature
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- Fe-Cr-Al doped Mo heating elements.
- ≤1200°C with inert gas
- ≤1000°C continuous under vacuum
- Heating rate: 20°C/min max
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Temperature Uniformity @ 900°C
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Temperature Control
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- Two 30-segment programmable temperature controllers are included.
- One for controlling furnace heating and one for monitoring sample stage heating and cooling
- Built-in automatic PID control with auto-tune, overheating, and T/C broken protection.
- ±1temperature accuracy.
- Two K-type thermocouples are included
- RS485 communication port
- Optional MTS-02 for remote temperature control and logging at PC
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Heating Chamber and
Vacuum-Sealed Flange
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Quartz chamber size: 9" O.D. x 8.5" I.D. x 13.4" L ( 230 OD x 218ID x 340 H, mm)
- Effective heating area: 8.5" ID x 8.5" Depth (218 ID x 216 H mm, 8.6 Liter) ( click pIc1 to see details)
- The quartz heating chamber is replaceable.
- Water cooling SS304 Vacuum flange with Or-ring fibrous alumina plate is installed on the electric lifting platform to seal the quartz chamber. (Pic, 3)
- One 16L/min recirculating water chiller is included for cooling the flange (pic. 4)
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Vacuum and Gas Flow
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- One KF25 port is built-in for vacuum pump connection.
- One dual-stage rotary vane pump with KF25 below and one angle valve are included. Pic 1
- One Pirani vacuum gauge (up to 10-4torr) and a mechanical vacuum gauge is included. Pic 2
- Pfeiffer 33 L/s turbopump is available for high vacuum operation up to 10-5 torr Pic3
- One 5L flowmeter with1/4" gas inlet and outlet is included for atmosphere control (Pic.4)
 Pic. 1  Pic. 2  Pic. 3  Pic.4
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Cooling Chamber
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The gas cooling system is built-in for faster cooling of a heated sample
- 4 gas blow tubes ate installed in for corner of the cooling chamber (Pic.1). The gas valve shall be opened before loading the heated sample down
- The sliding door must be closed immediately once the sample stage is down to insulate the radiation from the heating chamber. (Pic. 2)
- The cooling rate and temperature can be monitored by the thermal couple in sample stage
 Pic. 1  Pic. 2 |
| Compliance |
- CE Certified
- NRTL / CSA Certification is available upon request at the extra cost
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Application Notes
Click here to learn the installation of a gas regulator
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- Quartz tube furnace is designed for using under vacuum and low pressure < 0.2 bars / 3 psi / 0.02 MPa
- Attention: A two-stage pressure regulator must be installed on the gas cylinder to limit the pressure to below 3 PSI for safe operation. Click here to learn the installation of a gas regulator.
- Vacuum pressures in the furnace shall be used below 1000°C under vacuum processing
- The furnace can be used for brazing of two flat samples via top dead weight under vacuum at <1000°C
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Pic.1 
Pic. 2 
Pic3
Pic.4
Pic. 1 
Pic. 2