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three zone tube furnaces


CTF Three Zone Tube Furnaces

Similar in construction to the CTF and MTF models, the TZF offers excellent temperature uniformity as the heated length is divided into three zones each with its own temperature controller and thermocouple.

The power supplied to the end zones is automatically adjusted to compensate for the heat loss at the ends of the tube irrespective of whether the ends are left open or have insulation plugs fitted.

This system provides a longer uniform zone temperature than that achieved using a single zone furnace of the same length. The temperature controllers are usually linked so that they act to keep all three zones at the same temperature; this is known as slave control.


Three Zone Tube Furnace


Model TVS
11/--/600
TZF
12/38/400
TZF
12/65/550
TZF
12/75/700
TZF
12/100/900
TZF
12/--/1090
(note m)
TZF
15/--/610
TZF
17/--/600
Max Temp (°C) 1100 1200 1200 1200 1200 1200 1500 1700
Tube Inside dia (mm) 100 38 65 75 100
(note b)
150
(note b)
75
(note b)
75
(note b)
Heated Length (mm) 600 400 550 700 900 1090 610 600
Overall Length (mm) 700 450 600 750 950 1270 1200 950
Uniformity measured
at temp °C
1000 1100 1100 1100 1100 -- 1400 1600
Uniformity measured
using specified
tube diameter (mm)
No tube -- -- -- -- -- 50 75
+/-2.5°C
(note g)
Uniform Length
+/-5°C
(note f) 305 390 540 745 (note e) 450 400
Heat up
(mins) (note k)
(note h) 25 45 45 120 (note c) (note c) (note c)
Horiz or Vert use Option Option Option Option Option Option Option Option
Max power (kW) 3.0 1.5 2.0 3.0 4.5 7.0 8.0 7.5
Nett Weight (Kg) 25 18 30 32 40 60 44 180
Holding Power (kW)
(note d)
1.1 0.3 0.6 0.8 1.0 3.0 4.2 3.8
External height (mm) 750 430 525 525 525 660 640 755
External width (mm) 315 450 625 775 975 1335 1130 900
External depth (mm) 360 375 360 360 360 440 420 555
Note b: Maximum tube inside diameter.
Note c: Heat up rate will vary with worktube size and material.
Note d: Holding power at 100°C below maximum, tube ends insulated. Worktube length = overall furnace length
Note e: Uniformity will vary greatly depending on the size and material of the worktube.
Note f: These products may be used for materials testing without a worktube Note g: Uniformity is measured with the tube diameter shown and tube end insulation fitted in the optimum position.
Note h: Information available on request - Heat up rate and uniformity vary with the application.
Note k: To 100°C below maximum temperature.
Note m: Maximum diameter 150mm. Smaller tube sizes available.

Uniformity

Uniformity


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