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1100°C Vacuum Chamber Furnace (7.5"IDx 13"L, 7.6 Liter ) with UL Reganized Electric Components - VBF-1200X-H8-UL

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Item Number: VBF-1200X-H8-UL

VBF-1200X-H8-UL is a compact vacuum chamber furnace with a 7.5" ID x 13.4"L heatable quartz tube chamber placed horizontally. Water-cooled stainless steel vacuum flanges with valves are installed to achieve a vacuum atmosphere of 10-2 to10-5 torr through the use of a mechanical or molecular vacuum pump. All electric components are recognized by UL and ready to pass CSA, UL inspection.


Furnace Structure

  • Double layer steel casing with air cooling keeps furnace surface temperature lower than 60°C.
  • High purity fibrous alumina insulation for maximum energy saving.
  • Special refractory coating on liner and heating element to increase furnace life.
  • Water cooling falnge
  • All electric components are UL or Met recognized and ready to pass any safety test worldwide


3000 W max.


Single phase 208 - 240 VAC / 50/60Hz, (20 A breaker required)

Working Temperature

  • <= 1000 °C continuously

  • Max. 1100 °C, < 30 minutes
  • Temperature Uniformity: +/- 2°C

Heating Elements

High quality Ni-Cr-Al resistance wire as heating elements and can be heated up to 1200°C.

Quartz Tube Size & Effective Heating Area

  • Tube size: 8" O.D. x 7.5" I.D x 13.4" L.

  • Heating area: 7.5" ID x 8.5" Depth (7.6Liter)

  • Uniform Temperature zone: 4"dia x 3.5" depth in center position within +/- 5ºC

  • Quartz tube is replaceable ( click picture left to order spare tube )

Vacuum Flange

  • Stainless steel vacuum flange with dual high temperature silicone O-rings at front door.
  • One needle valve is built into the flange for use as gas inlet.
  • One KF25D port on left side of furnace for connection to vacuum pump.
  • A water cooling jacket has been built inside the flange to protect the vacuum sealing assembly from melting at over 300°C. The inlet and outlet ports located on the left side of furnace are used for connecting to a water chiller through two 12 mm dia. polyurethane tubes (water chiller is sold separately). Please click here to review detailed info of the water chiller.
  • A Quartz Thermal Block (filled with fibrous alumina) is included to prevent heat radiation and dissipation. It also provides excellent vacuuming while ensuring a clean environment inside the chamber.
  • Optional: If using the furnace for flat samples, a flat sample holder (pictured left-bottom) can be ordered.

Digital Vacuum Gauge & KF25 Fitting

Vacuum Pressure

Vacuum Level is dependent on the vacuum pump used, connected pipe, interior refractory block's materials etc. By using KFD25, stainless steel pipe, MTI's two stage mechanical pump and KF25 Ball valve, the furnace can achieve vacuum levels below:

  • 10 mtorr (10-2 torr)via mechanical pump within 30 minutes withoutThermal Block
  • 60 mtor

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