These units have a maximum operating temperature of 1200°C, 1500°C and 1600°C. For units at 1200°C, heating is via an integral resistance wire element wound on to the ceramic work tube which is an integral part of the furnace. At 1500°C and 1600°C, silicon carbide rod elements are mounted parallel to the tube.
The end zone controllers are coupled to a centre zone thermocouple enabling the centre zone temperatures to be closely linked. This system provides a longer uniform zone temperature than that achieved by the use of single zone furnace of the same length.
Temperature uniformity
Temperature variation within the uniform zone is typically +5°C, with a significant proportion of the uniform zone length within +1°C. To improve the uniform zone length within a tube furnace, it is necessary to use multi-zone furnaces; the usual configuration is 3 zones.
Temperature uniformity will depend on the tube diameter and heated length.
Technical Specification
| 1200°C Models |
PTF 12/38/500 |
PTF 12/50/610 |
PTF 12/75/750 |
PTF 12/100/940 |
| Maximum operating temperature (°C) |
1200 |
1200 |
1200 |
1200 |
| Maximum continuous temperature (°C) |
1150 |
1150 |
1150 |
1150 |
| Tube inside diameter (mm) |
38 |
50 |
75 |
100 |
| Heated length (mm) |
500 |
610 |
750 |
940 |
| Maximum power (kW) |
1.5 |
2.0 |
2.75 |
4.2 |
External dimensions including console
(mm – h x w x d) |
565 x 560 x 300 |
565 x 670 x 300 |
565 x 810 x 300 |
625 x 1000 x 400 |
Optional separate work tubes
(mm – id x length) |
25 x 700 |
38 x 900 |
60 x 1000 |
75 x 1500 |
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| 1500°C Models |
PTF 15/50/450 |
PTF 15/75/450 |
PTF 15/50/610 |
PTF 15/75/610 |
| Maximum operating temperature (°C) |
1500 |
1500 |
1500 |
1500 |
| Maximum continuous temperature (°C) |
1450 |
1450 |
1450 |
1450 |
| Tube inside diameter (mm) |
50 |
75 |
50 |
75 |
| Heated length (mm) |
450 |
450 |
610 |
610 |
| Maximum power (kW) |
5.0 |
5.0 |
8.0 |
8.0 |
External dimensions including console
(mm – h x w x d) |
640 x 830 x 420 |
640 x 830 x 420 |
640 x 1130 x 420 |
640 x 1130 x 420 |
Optional separate work tubes - Short
(mm – id x length) |
50 x 900 |
75 x 900 |
50 x 1200 |
75 x 1200 |
Optional separate work tubes - Long
(mm – id x length) |
50 x 1200 |
75 x 1200 |
50 x 1500 |
75 x 1500 |
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| 1600°C Models |
PTF 16/50/450 |
PTF 16/75/450 |
PTF 16/50/610 |
PTF 16/75/610 |
| Maximum operating temperature (°C) |
1600 |
1600 |
1600 |
1600 |
| Maximum continuous temperature (°C) |
1550 |
1550 |
1550 |
1550 |
| Tube inside diameter (mm) |
50 |
75 |
50 |
75 |
| Heated length (mm) |
450 |
450 |
610 |
610 |
| Maximum power (kW) |
6.0 |
6.0 |
9.2 |
9.2 |
External dimensions including console
(mm – h x w x d) |
640 x 830 x 420 |
640 x 830 x 420 |
640 x 1130 x 420 |
640 x 1130 x 420 |
Optional separate work tubes - Short
(mm – id x length) |
50 x 900 |
75 x 900 |
50 x 1200 |
75 x 1200 |
Optional separate work tubes - Long
(mm – id x length) |
50 x 1200 |
75 x 1200 |
50 x 1500 |
75 x 1500 |
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