додатен прибор
Slotted screens can be covered with nonwoven geotextile in order to be used in particular applications such as drainages, etc.
The material used to cover the screen is a white polypropylene needle punched nonwoven geotextile that has excellent permeability and allows the flowing inside of water while stopping the thin sediment outside. This type of coating offers good protection in clay or shale and prevents clogging.
The nonwoven geotextile is double crossed texture sewed and is wrapped very tight around the screen in order to avoid that it rolls up during pipe laying.
OUR RANGE
Diameters: from 60 mm to 125 mm, other diameters upon request
Length: 3/6 mt
Connections: M/F threaded with socket, flush jointed.
FEATURES OF 150 g/mq* NONWOVEN GEOTEXTILE
Description: Polypropylene needle punched nonwoven geotextile, white colour, no chemical binders.
Tensile strength |
kN/m |
MD |
CMD |
CBR Puncture test |
kN |
1,30 |
|
Dynamic perforation ( cone drop test) |
mm |
23 |
|
Water flow capacity |
Lt/sec/mt |
1,84 x 10 -3 |
|
Water flow rate |
Lt/mt2 /sec |
70 |
|
Characteristic opening size |
µm |
65,00 |
|
Weathering resistance |
To be covered within 14 days after installation |
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Hydrolysis resistance |
Durability expectation 25 years for normal soil with 4< pH < 9 and temperature < 25°C |
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* For reasons of space the table above shows the features of one type of nonwoven geotextile only, but other types are available.
