National Plastic produces a high quality range of PVC-U well casings and screens strictly in accordance with the Metric Standard DIN 4925, Parts I, II and III. The standard DIN8061 applies as well for materials and workmanship of pipes used in the manufacture of the casing and screen.
There are two basic ranges - a standard range for shallow and medium well depth and a heavy duty, thick walled range for greater well depths. (See Table II in Technical Data for details)
The casing and screens are made from 100% virgin unplasticized poly vinyl chloride compound and are coloured blue. They are supplied with a male pipe thread at the spigot end and a female pipe thread at the socket end.
Screens can be supplied with either a plain or ribbed surface. Ribbed surfaces increase water permeability and help prevent clogging of intake openings. Slots are arranged horizontally to improve the mechanical strenght of the screens and are designed to give open areas ranging from 6% to 12% depending on the size and slot width.
- More Informations:
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- Technical Data
- Screen & Casing Assembly
- Specifications for Sizes
- Dimensions and Arrangements of Slots
- Screw Threads
- Usage and Installation
- HDPE Casing & Screens
