offer filter,rare earth procelain sand, Beijing KaiBiYuan

Pebble support gravel(F08), the low strata of a filter bed, acts to support the filter media. The max efficiency, the support gravel must possess the necessary attributes of hardness and be rounded or non-angular. Correct gradation and sizing must be calculated to properly support the filter media. Pebble support gravel(F08) package: 25, 50, 500 kgs woven bag Type SiO2 Content min Density g/cm3 Insoluble in HCl, max Bulk density g/cm3 Hardness Moh, min Attrition max Pebble support Gravel(F08) 60%-97% 2.67 0.2% 1.85 7.0-8.0 0.5% Particle size, mm 2.0 -4.0mm , 3.0 -5.0mm , 4.0 -6.0mm , 4.0 -8.0mm , 6.0 -12.0mm , 8.0 -16.0mm , 12 -20mm , 16 -25mm , 16 -32mm , 30 -40mm , 32 -50mm , 32 -64mm (Other specs. are available)