HT-1200 high pressure split tube furnace can be chosen from two kinds of alloy tubes, Stainless steel 310S refractory alloy or Ni-based super Alloy, which offer a solution of heating treatment under high positive pressure with/without inert gas support to process special compound material. The high pressure tube furnace can be heated up to the max 900°C or 1100°C with the optional vessel. The operating positive pressure is from 105 to 800 psi according to different heating temperatures.

Heating temperature up to max 900°C or 1100°C, Depends on tube alloy

Stainless steel or nickel-base super alloy processing tube (optional)

Max pressure up to 800 PSI depended on tube alloy

The pressure sensor is installed in the flange. The pressure will be displayed in the pressure controller in the front panel of the high pressure tube furnace. The alarm system is built in the pressure controller. When the pressure exceeds the limit point, the alarm strobe and whistle will be activated for warning

The high pressure split tube furnace is able to be controlled by a computer. And the software and USB cable are included (optional).

SPECIFICATIONS of high pressure tube furnace

-          Process Vessels SS310S Stainless Steel alloy

80mm O.D x 70(±2) mm I.D x 1000 mm L or 60mm O.D x 50(±2) x 1000 mm L

Ni-based super alloy (optional)

-          Copper gasket sealing

-          Working Pressure vs. Working Temperature

  600 PSI max   at ≤500°C

  511 PSI max   at ≤600°C

  428 PSI max   at ≤700°C

  203 PSI max.  at ≤800°C

  116 PSI max   at ≤900°C

Attention: Never heat up above 900°C, 900°C max.for < 1hr 

Ni-based superalloy tube will be following pressure.

580 PSI (4 Mpa), max. at  ≤800°C

362 PSI (2.5 Mpa), max. at  ≤900°C

174 PSI (1.2Mpa), max. at ≤1000°C

116 PSI (0.8 Mpa), max. at 1100°C

Attention: Never heat up above 1100°C

The furnace also can reach high vacuum up to 10-6 torr by turbo pump.

-          Pressure Range, 0~15Mpa

-          Max. Heating Temp: 900°C, 1100°C (Ni-based superalloy tube)

-          Working Gases, Inert gas & Hydrogen and oxygen

-          Heating Temperature, 900°C max for < 1hr, 800°C continuous

1100°C max for < 1hr, 1000C for continuous (Ni-based superalloy tube)

-          Heating Rate: ≤30°C/min, ≤20°C/min

-          Heating Element: Fe-Cr-Al Alloy doped by Mo

-          Heating Zone: Total length: 440mm Single zone

Constant temp. zone: 150mm ±1°C     Total length: 440mm Single zone

-          Temperature Control, PID control method with over-temp protection

-          Temperature stability: ±1°C

-          Thermocouple: K Type with high-temperature tolerance (220°C) connector    

-          Positive Pressure Sensor: Installed in the high-pressure flange

-          Pressure Alarm System: The upper limit and lower limit control method, Alarm strobe and warning whistle

-          Voltage: AC 220V 50/60Hz

-          Power, 2.5KW (20A breaker required)

-          Application Notes of high pressure tube furnace      

--- The heating temperature must be limited by a certain pressure level due to vessel material strength.

--- The pressure increases while the temperature is rising during operation. So you need to calculate the pressure changing towards your target temperature and set a safe value of pressure during the process

--- The high pressure split tube furnace uses a tube with conflate designed flanges.

--- Note: Please never use an ordinary SS tube to connect to gas-inlet for using > 5Mp pressure, which may cause the tube exploded.   

--- The safety pressure relief valve is available to be installed at the downstream side.

--- Small quartz or Alumina boat should be used to load the sample into the vessel. Never place the sample directly onto the vessel without a crucible. Vessel service-life could be reduced significantly if you do so.

--- You may use gold or nickel foil to wrap the crucible boat to minimize the contamination to the pressure vessel.

--- Optional torque wrench is available here to avoid over tightening the flange bolts

--- To measure the electric properties of thermoelectric ceramics under high pressure & temperature conditions, please order alumina testing fixture and high-pressure electrical feed through (10Mpa Max.) with the furnace.

-          Safety Note of high pressure tube furnace 

--- Ni-based Superalloy is a reliable processing tube which can be used under high temperature and high pressure. It has excellent ductility and tensile property so only creep deformation happens under overpressure destruction test and following by a crack formed (usually at the hot zone at the center of the tube) to release the pressure. Brittle fracture won’t happen in the overpressure destruction test which means no tube explosion will happen under the overpressure of inert gas or safe gas or under other accidents causing overpressure of inert gas or safe gas.

--- Attention: A two-stage pressure regulator must be installed on the gas cylinder to limit the pressure to below 3 PSI for safe operation. Please click here to learn how to install the gas regulator.

--- Do not over tightening the flange screws as this may cause permanent damages to the flange or screws. Please refer to the instructions about proper torque for installing CF flange bolts. We recommend you use a torque wrench to tighten the screws with the flange.                                           

-          Warranty of high pressure tube furnace:    

One-year limited manufacturer warranty with lifetime support (Consumable parts such as processing tubes, o-rings, and halogen lamps are not covered by the warranty).