Gravel pack screens
STÜWA gravel pack screens are made of a standard wall PVC-U filter pipe compliant to DIN 4925 and a permanently attached gravel pack. The screens are thus able to provide a uniform gravel size distribution and are particularly suitable for drilling applications, where normal gravel distribution can not be ensured.
Only high grade filter gravel compliant to DIN (EN) is used for manufacture. All adhesives and bonding materials used are suited for drinking water applications.