FILTER SAND
TYPICAL USES, PARTICULATE REMOVAL
APPLICATIONS, PART OF MULTIMEDIA
AND SAND FILTRATION SYSTEMS
IWE water filter sand is composed
of sub-angular, hard, durable,
and dense grains of predominately
siliceous material. Extracted
from a clean glacial sand deposit,
IWE Sand and Gravel ’s physical
properties make it among the finest
available in the world for filtration
applications. Our water filter
sand is washed, kiln dried, and
screened to meet EXACTING specifications
with strict adherence to quality
control.
We also specialises in custom
grades of sand and gravel to meet
your stringent specifications.
Sand is characterized by the diameter
of the individual sand grains
(eg 0.15-.35 mm) and the effective
size of the composite sand, the
ES or d10. d10 is defined as the
sieve size in mm that permits
passage of 10% by weight of the
sand. The uniformity coefficient
(UC) of a sand is defined as d60/d10.
Sand needs to be of a fine grade
( 0.15-.35 mm is recommended),
uniform (the UC should always
be less than 3 and preferably
less than 2), and be washed free
of loam, clay, and organic matter.
Fine particles will quickly clog
the filters and frequent cleaning
will be required. A sand that
is not uniform will also settle
in volume, reducing the porosity
and slowing the passage of water.
Sand manufacturers should be able
to supply or blend sand to these
specifications.