Physical Properties Colour (Color) Black to Brown Bulk Density 1.46 gr/cm3; 1.46 tonne/m3; 91lb/ft3; Specific Gravity (Particle Density) 2.69n gr/cm3 Effective Size 0.43 mm Uniform Coefficient 1.34 Porosity 45.80% Mesh Size 20-45 Attrition Loss P/Annum 1 - 5 % (depending on water condition) Condition of Operation Attrition Loss P/Annum Water pH range 5.8 - 8.6 Maximum Water Temperature 45 degrees C (113 degrees F) Bed Depth 600 mm (minimum) Freeboard 40% of bed depth (Minimum) Regeneration Not Required Service Flow Rate 5 - 30 m3/m2 per hr Backwash Flow Rate 25 - 80 m3/m2 per hr Backwash Bed Expansion Between 15 - 50 % Bag Information Net Weight (each bag) 20 kg (44.1 lb) Volume (each bag) 13.7 litres (liters) (0.484 ft3) Bags per metric tonne 50 bags Bulka Bag One (1) tonne Bulka bags are also available on request for large applications