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Vacuum Heated Pressing Furnace up to 1000ºC with 4" Quartz Tube and Water Cold Flange - OTF-1200X-VHP4

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Item Number: OTF-1200X-VHP4
Transported by LTL Freight (Truck)


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The OTF-1200X-VHP4 is designed for making dense compound materials under both vacuum and high pressure, and/or bounding multi-layer wafer together under a pressure up to 5 metric tons.    It is integrated with split vertical tube furnace with a vacuum-sealed 4" quartz tube and  20T electric hydraulic press, as well as one set of 0.5" ID  graphite pressing, die.   The furnace can be heated up to 1000ºC using a temperature controller with 30 programmable segments. Water cooled flanges facilitate a vacuum level up to 10E^-5 Torr via the use of an optional turbomolecular pump.


Max. Pressure

5 metric tons ( 10 MPa on pressure gauge ) limited by supporting structure

Electric Hydraulic  Pump

  • Built in an electric hydraulic pump with Max. load capability of 20 metric tons.
  • Built-in digital pressure gauge which automatically cut off electrical pump power at setting pressure.
  • Cylinder size 25 mm in diameter.
  • Bottom cylinder (piston) Maximum traveling distance: 15mm
  • Please click on left picture for details.

Vertical Furnace


  • Splittable vertical furnace heated by Ni-Cr-Al resistance wire
    • Max. working Temp>           1000oc < 60 minutes
    • Max. Heating Rate:            < 10oC/minute
    • If increasing the working temperature to 1200oC, may choose OTF-1500X furnace
  • 30 segment programmable controller with +/-1ºC accuracy
  • RS485 port installed for remote PC operation (Pls click here to order software - EQ-MTS02-Y at extra cost )
  • Power consumption: 2200W
  • Power input: 208 - 240VAC, 50/60 Hz single phase
  • Note:  MTI reserves the right to update the product with better functions without notice        

Heating Zone

  • Heating Zone Length: 12" (300mm)
  • Constant temperature zone: 100mm

Quartz Tube & Sealing Flange

Option Vacuum Pump
  • Max. achievable vacuum level: 10E^-4 Torr by turbo pumping station (EQ-PAC-LD turbo pumping system with powerful backing pump, please don't use small pumps ) 
  • Or 10^-2 torr by a mechanical pump.
  • Please click on pictures below to choose a vacuum pump at extra cost.

High-Temperature Pressing Die Set 
  • One set graphite supporting rod (One top & one bottom) is built in. ( bottom left picture )
  • One set of 0.5" ID  graphite die are included for immediately use. ( bottom central picture)
  • The high temperature dies kit is usually made of high purity graphite with max. working pressure of 50 MPa
  • The graphite pressing die gets broken easily and is consumable, please click on the central photo below to order extra sets. We can also provide customized die sets upon customer request at extra cost
  • Mica spacers are used to adjust the height of die sets (while providing heat insulation). Please click on the bottom right picture below to order spares.( bottom right photo )
  • The ID( inner diameter ) of the die set must be taken into consideration when using the hydraulic press to compress the sample. For example, the graphite dies set with an ID of 0.5" can only withstand a maximum pressure around ~0.6 Metric Ton from the press to maintain its structural integrity.
Product Instructions & Demo Video

  • 1050mm(L) x 750mm(W) x 1750mm(H)  ( please click picture below to see details )


Net Weight

 365 kg  

Weight of Shipment
& Dimension

 450 kg


  • CE certified 
  • NRTL or CSA certification is available upon request at the extra cost
  • The pressing machine was quality inspected in the USA, lifetime support is provided
  • One year limited standard warranty, (Consumable part like graphite die do not have any warranty.)
  • (Extended warranty is available up to 5 years at extra cost)

Application Notes
  • 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.
  • This furnace can be modified into a flash-sintering furnace  as shown in the picture below:

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1. Prices listed online are valid for US market and whom pay by credit card only. There will be extra charges for shipping & handling. Price various from country to country.
2. We may add extra charges for paper order and net30 terms due to extra labor cost.
3. The prices listed are subject to change without notice.