MAJOR PRODUCTS The major products of Delmon are silica sand, filtermedia (Filter Sand
, Gravel and Anthracite), oilwell drilling products, industrial salt, potassium chloride, calcium chloride, barytes, calcium carbonate, talc, bentonite, polybilt and plastic colouring masterbatches, waterproofing and coating products, insulation and industrial gasket products.
20 filter sand
bed is a function of the filtration rate.
with a uniform grain diameter of 0.5 mm, and with a 40 percent void space, has approximately 2,200 square feet in that 1-cubic-foot box.
The state regulations require not less than twenty-four inches of filter sand
. In the course of operation and time, though, the sand condenses and is lost through the piping, and regular raking activities remove sand from the surface as well.
The LPP laterals are installed in 12 inches of 1/2-inch limestone which rests on the filter sand
. The design application rate of the filter surface is 1.11 g/|ft.sup.2~/d.
When guys would come in to buy filter sand
, Barto would pick up two 50-pound bags and head out to their trucks.
This is underlain with filter sand
with an EF of 0.45 to 0.55 mm and a UC between 1.5 and 1.7.
Among companies furnishing filter sand
and gravel arc American Filter Sand
; BOS Sand Co.; Culligan Int'l.