You are here: RAKU KILNS Type 260 Techn. Details Type 260  
 TYPE 260
Techn. Details Type 260
 RAKU KILNS
General
Type 260
Type 160

TECHN. DETAILS TYPE 260
 
Kiln casing     
Outside diameter   mm  571 
Height  mm  690 
Thickness  mm  1,0  
Outside surface treatment    RAL 7035 
Inside treatment    Coated 
Curled stiffening edge    Yes 
Clamping ring    Galvanised steel 
Forced stiffening ribs    Not applicable 
Grips    Galvanised steel 
Burner port   mm  Ø 100 
Kiln cover     
Diameter  mm  610 
Material thickness  mm  1,0 
Surface treatment    Ral 7035 
Grips    Galvanised steel 
Flue gas port  mm  Ø100 
Insulation     
Type    Superwool 607 HT - low persistent blanket  
Material    Alkaline Earth Silicate (glass) Wool 
Thickness  mm  50 
Temperature rating  °C  1300  
Melting temperature  °C  1499 
Density  kg/m³  128 
Fastening    Kanthal AF - Ø 2 mm  
Insulation flame protection    2x ceramic shelf 
Kiln dimensions (inside)     
Diameter  mm  470 
Height (from shelf)  mm  500 
Weight  kg  28 
Max. ware dimensions (1)     
In diameter  mm  420 
In height  mm  450 



Average firing procedure - 1000 °C
Preheating (2)  Pressure  Bar  ≈ 0 
  Time  Min.  15 - 30 
Preheating (3)  Pressure  Bar  ≈ 0 
  Time  Min.  15 - 30 
Half capacity  Pressure (4)   Bar  0,3 - 0,5  
    Min.  20 - 30 
Full capacity  Pressure (4)   Bar  0,6 - 0,8  
    Min.  30 - 40  



Remarks

(1)
These dimensions may not be considered as absolute values. Limitations strongly depends on the ratio between width/diameter/height of the ware.

(2)
During this preheating the kiln cover is removed from the kiln. This prevents that the temperature rised too quickly. When you fire the kiln multiple times a day this preheating is only recommended for the kiln at the first firing session. However for the ware itself you can decide to include this extra preheating time especially when you have applied the glaze just shortly before the firing. The indication of ≈ 0 means that the gas pressure is just enough to ignite the burner.

(3)
The kiln cover is put on the kiln. This will lead to a higher temperature with the same gas pressure than the preheatin done without the kiln cover.

(4)
Pressures are no absolute value's but indicative as they can vary with loading of the kiln and ambient conditions.
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