Sefu company offers Silicon Carbide Ceramic Foam filters in all common sizes starting from 1.5×1.5×0.5" up to 6x4x1.25" and 6x6x1.25" mm. Custom-tailored solutions ( e.g. conical shaped filters ) are available on request. Silicon carbide ceramic foam filter sized 6×4" and 6×6" are recommended to be used in thickness 1.25" instead of the common thickness of 7/8". 1.25" thick filters have the advantage that the bending strength is significantly higher than that of 7/8" thick filters.
The silicon carbide ceramic foam filter product by Sefu can be used for larger castings or longer casting times. The listed porosities below are used most widely:
10 PPI: Grey and Spherical Iron.
20 PPI: Spherical Iron and casting with a very high demand for quality.
30 PPI: Malleable Iron and castings with an extremely high demand on quality.
Advantage of Silicon Carbide Ceramic Foam Filter:
◆ It reduces gas and inclusions in castings.
◆ It reduces the turbulence level of molten metal when filling the mold.
◆ It reduces surface defects in castings.
◆ It reduces the rejection rate of casting significantly.
Application:
Silicon carbide ceramic foam filter product is widely used in molten metal filtration to remove undesirable nonmetallic inclusions in the melt.
Technical Data:
Name
Silicon Carbide Ceramic Foam Filter
Porosity(%)
80~85%
Aperture
10PPI-40PPI
Colour
Grey
Shape
Round, Square, Rectangular (can be customized)
Working Temperature
≤1500°C
Bending Strength(Mpa)
≥0.8
Compression Strength(Mpa)
≥1
Thermal Shock Resistance
1100°C---room temperature 6 times
Volume Density
0.4-0.5g/cm3
Tolerance of Dimensions
-1.5 / +0.5mm (also be customized according to customer requirements)