2023 Online Catalog - Flipbook - Page 131
#1-1/2 Anthracite
4
Anthracite
Because of its fractured shape, some 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.
Anthracite, because of its unique density, can be used in multimedia filters. At 56 lbs./ft.3 it will hydraulically classify and
remain above heavier medial such as Filter Sand or Manganese
Greensand providing a pre-filtration layer.
Advantages:
• Higher service flows and longer filter runs than
equivalent sand filters.
• Close attention to gradation, hardness and purity assures
consistent and reliable performance.
• Unique density allows Anthracite to be combined
with other filtration media in multi-media filters.
Physical Properties:
Color ............................................................................................................................................ Black
Density ...............................................................................................................50 lbs./cu. ft.3
Effective Size #1-1/2 .................................................................................... (0.85-0.95
mm) ......................................................... Uniformity Coefficient
#1-1/2 ...................................................................................................................................... (1.6)
Mesh Size - #1-1/2 ........................................................................................... (10 x 20)
Sphericity ..................................................................................................................................... 0.6
Hardness.......................................................................................3.0-3.8 (Moh’s Scale)
Acid Solubility ....................................................................................................................
