... double and three-layer filter now.Application1) It applies to a various of filter machines, ion exchange units, filtering pools, mobile ... industry, chemicals, papermaking, pharmacy, swimming pool, waste water.Advantages1) High mechanical strength, broken rate and wear rate should not be ... /cm3)0.95Breakage(%)≤1.6Clay content(%)≤4Void(%)47--53 High effective of Anthracite coal for Water purification