DANSAND A/S erklærer hermed, at ovennævnte materiale opfylder krav i overensstemmelse med EN 12904:2005
DANSAND® Filter sand helps safeguard the quality of our water reserves. This uncompromising product is a popular choice as a filter medium for well drilling and the construction of water filters.
Production of filter sand takes place in a highly controlled process. We wash the silica sand to remove all clay and dust, sort it and dry it using natural gas to ensure that it is entirely free from bacteria. Finally we sift the sand to achieve a uniform and precisely defined filter sand quality.
DANSAND® Filter sand is sold to well drillers all over Denmark and Germany. Used in combination with Bentonite the products gives maximum water flow in the well.
Dansand® filter sand can be made in special grades as per agreement. Our standard grades can be seen below.
In addition to the grades mentioned we also offer substrates in three grades:
The substrate is constructed using rounded lake stones that are washed and sorted. These can also be desinfected if so desired.
Washed, oven-dries, sterile and sifted filter sand, filter gravel and filter stones.
Dry, under cover and with no contamination hazard.
Keep dust in check. Packaging and used filter material must be disposed of in accordance with current rules and regulations.
From the tanker truck, the filter sand can be filled into filters at waterworks using water through a hose to limit the formation of new dust. Instructions are always included for proper filling of water filters.
Together with the sand, we provide a sifting analysis that documents the quality. Dansand® stores the analysis and a physical sample of the delivered sand for five years from delivery
|0||0,40-0,80 mm||max. 5%||max. 5%||1.5||1,586|
|1||0,40-0,90 mm||max. 5%||max. 5%||1.5||1,605|
|2||0,71-1,25 mm||max. 5%||max. 5%||1.5||1,622|
|3||0,90-1,60 mm||max. 10%||max. 10%||1.5||1,63|
|4||1,00-2,00 mm||max. 10%||max. 10%||1.5||1,575|
|5||1,40-2,50 mm||max. 10%||max. 10%||1.5||1,574|
|6||2,00-3,55 mm||max. 10%||max. 10%||1.5||1,582|
|7||3,15-5,60 mm||max. 10%||max. 10%||1.5||1,579|
|8||4,00-9,00 mm||max. 10%||max. 10%||1.5||1,578|
D10/D60 = degree of non-uniformity
Overgrain/undergrain max. = maximum allowed % grains over/under sift
Produced according to DS/EN 12904.
For well drilling and for the construction of water filters.