Simple Tube Furnaces (1050 C-1600 C)

The tube furnace provides the user with a cylindrical, gas tight atmosphere controlled hot zone.

The sole purpose of using a tube furnace is to have heating in a controlled atmosphere or in vacuum. As the name suggests, the tube furnace houses a work tube made of either Alumina or Quartz depending on the temperature of operation. The work tube is equipped with gas tight stainless steel flanges on both ends for gas purging and vacuum applications.

The hot zone in a tube furnace is located at the centre of the work tube, having a length of either 200, 250 or 300 mm along the length of the tube and diameter same as the inner diameter of the work tube.  

The hot zone is heated using either metallic, Silicon Carbide or Molybdenum Disilicide heating elements. The hot zone is insulated by multiple layers of low thermal mass vacuum formed ceramic fibre boards of a grade commensurate with the maximum furnace operating temperature. The vacuum formed fibre boards together along with furnace duel body construction having forced air circulation between the outer and inner body ensures outer skin temperature below 60° C at the maximum furnace operating temperature. The furnaces are equipped with thyristor powered by automatic programmable PID controllers ensuring control accuracy of +/- 1° C. The outer bodies of the furnaces are duly powder coated for good appearance and longer life. In Single zone furnaces,  distribution of temperature follows a plateau curve inside hot zone. The distribution of temperature may improve with the use of radiation shields, increasing the length of the plateau in the curve. Temperature at end of hot zone is generally 15-20° C less than at centre of hot zone.

The length of uniform hot zone where temperature is +/- 5° C from temperature shown in thermocouple is less than total hot zone length and is a function of hot zone diameter and total length.

The maximum operating temperature of these furnaces range from 600° C to 1700° C.

Tube furnaces can be customized as per user requirement.

Our Standard Models

Model

Working Temperature

Hot Zone (OD X L)

Heater

Work Tube Material

Thermocouple Type

TF1050V1

1050

60 x 250

Metallic

Q / 80% A

K

TF1050V2

1050

90 x 300

Metallic

Q / 80% A

K

TF1150V1

1150

60 x 250

Metallic

Q / 80% A

K

TF1150V2

1150

90 x 300

Metallic

Q / 80% A

K

TF1350V1

1350

60 x 250

SiC

99% A /80% A

R

TF1350V2

1350

90 x 300

SiC

99% A / 80% A

R

TF1400V1

1400

60 x 250

SiC

99% A / 80% A

R

TF1400V2

1400

90 x 300

SiC

99% A / 80% A

R

TF1500V1

1500

60 x 250

MoSi2

99%A

R

TF1500V2

1500

90 x 300

MoSi2

99%A

R

TF1600V1

1600

60 x 250

MoSi2

99%A

B

TF1600V2

1600

90 x 300

MoSi2

99%A

B

 

Flange Material: Stainless Steel or Aluminum
Flanges Application: Gas Puring or Vacuum or Both
Complete Vacuum System: Optional
Temperature Control: Phase angle fired Thyristor based, driven by programmable (PID) profile controller 
Insulation: Vacuum Formed Ceramic Fiber Insulation
Thermocouple Protection: Alumina or Inconel Sheath depending on maximum operating temperature
Safety Features: As per user requirement
Q: Quartz Tube, A: Alumina Tube

Optional fittings include:.

  • A wide range of tubes
  • Gas tight end fittings for work in controlled atmospheres
  • For increased uniform temperature zone length, three zone versions are available
  • Vacuum pump and related accessories
  • R-Type thermocouple – this option upgrades the standard K Type (mineral insulated inside Inconel sheath) thermocouple to R-Type thermocouple and is recommended if furnaces is going to be used continuously at 1200°C.
  • Over-temperature protection – This option is recommended to protect valuable contents & for unattended operation.
  • Data logging and remote controlled controllers – A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232 and RS485.
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