Clack Anthracite Filtration Media - Pure Aqua, Inc.
Although its potential for water treatment has been recognized since ancient times, anthracite coal was not used for this purpose until the beginning of the 20th century. Crushed Anthracite makes an excellent medium density filtration media. Clack Anthracite is mined from the finest Pennsylvania coal. It is specifically selected for water treatment, and during its production goes through several sizing inspections. Representative samples are randomly chosen for a complete laboratory quality control analysis for effective size, uniformity coefficient, specific gravity, acid solubility and hardness. Because of its angular shape, some of the sediment penetrates deeper into the bed. When compared to equivalent filter sands, this means longer filter runs and less head loss. Backwash rates are also reduced. Because of its unique density, Clack Anthracite can be used in multi-media filters. At 50 lbs/ft³, it will hydraulically classify and remain above heavier media such as Filter Sand or Manganese Greensand, providing a prefiltration layer.
A8029 Anthracite #1 (0.6-0.8 mm) 1 50 lbs. 50 2550 lbs. 40" x 48" x 56"
A8030 Anthracite #1½ (0.85-0.95 mm) 1 50 lbs. 50 2550 lbs. 40" x 48" x 56"
A8031 Anthracite #2 (1.7-2.0 mm) 1 50 lbs. 50 2550 lbs. 40" x 48" x 56"
• Effective Size: • Service flow rate: 5 gpm/sq. ft.
• Uniformity Coefficient: #1 Anthracite: 12-18 gpm/sq. ft.
#1 Anthracite: <1.7 #1½ Anthracite: 18-25 gpm/sq. ft.