Filter gravel is poured into the annulus space between screen and borehole walls. It is used for retaining fine sands from the surrounding formation.
The filter gravel is selected according to the screen analysis.
Filter gravel is standardised, i.e. it must possess a round, not sharp-edged composition, to avoid obstruction of the screen slots.
Filter gravel for well-drilling compliant to DIN 4924 and EN 12904
- Natural quartz sand and gravel
- Round edges
- Clean of organic contamination
- Premium quality due to state-of-the-art processing technology
Fields of application:
- Shaft wells
- Driven wells
- Bore wells
- Horizontal spring wells
The composition of the filter gravel constitutes an important requirement for the quality and durability of wells.
Filter gravel is also used in screens for drinking water purification.
In sacks of 25 kg each and in big bags of 1,000 kg