PTF - Three zone tube furnaces : 1200, 1500 & 1600°C

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 is dependent on the tube diameter and heated length.

PTF three zone tube furnace 

Model
(1200°C models)
PTF 12/38/500 PTF 12/50/610 PTF 12/75/710 PTF 12/100/910
Maximum 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 l x d)

565 x 56 x 300

565 x 670 x300

565 x 810 x 300

625 x 1000 x 400
Work tube length : ID x length (mm) 25 x 750   38 x 900 60 x 1000 75 x 1500

Model
(1500°C & 1600°C models)
PTF
15/50/450
PTF 15/75/450 PTF 15/50/610  PTF
15/75/610
PTF 16/50/450  PTF 16/75/450 PTF
16/50/ 610 
PTF 16/75/610 
Maximum
temperature (°C)
1500 1500 1500 1500 1600 1600 1600 1600
Maximum continuous
temperature (°C)
1450 1450 1450 1450 1550 1550 1550 1550
Tube inside diameter (mm) 50 75 50 75 50 75 50 75
Heated length (mm) 450  450 610 610 450 450 610 610
Maximum power (kW) 5.0 5.0 8.0 8.0 6.0 6.0 9.2 9.2
External dimensions including console
(mm - h x l x d)
640
830
420
640
830
420
640
1130
420
640
1130
420
640
830
420 
640
830
420 
640
1130
420 
640
1130
420 
Work tubes : ID x length (mm)
Short
Long


50 x 900
50 x 1200 


75 x 900
75 x 1200


50 x 1200
50 x 1500


75 x 1200
75 x 1500


50 x 900
50 x 1200


75 x 900
75 x 1200 


50 x 1200
50 x 1500


75 x 1200
75 x 1500

Lenton

Parsons Lane, Hope,
Hope Valley, S33 6RB,
UK
Registered in England & Wales - Company No. 01371507
BS EN ISO 9001: 2008 registered company
VAT No: GB592639695
+44 (0) 1433 621515
Fax: +44 (0) 1433 623600