Packman Sand Filters
Packman sand filters for filtration insoluble in water with a turbidity of greater than 1 NTU, used in swimming pools and industrial use, made of steel plate ST. 37 (or 17MN4) the vertical cylinder with two torispherical head in different diameters and are individually.
Appropriateness diameter, number of nozzles and quickly washed the sand filter is the most important feature.
Geysers built on top of the sand filter matched of water into the tank makes it possible to pass the water through of silica have balanced.
All of our sand filters built according to ASME pressure vessel code Sec. VIII Div. 2
Both of top and bottom head are torispherical. This type of head has a longer life and higher pressure resistance in the same thickness.
Sand Filter Welding
In sand filter welding process, we used ISAB SAW welding machine. After assembling, vessel parts fit to gather by SAW welding and the bottom head welded by 6 passes for higher strength.
Sand has a 98 percent purity
Sand grading specification |
|
Grade No.1 diameter |
0.5-1.5 mm |
Grade No.2 diameter |
2-3.5 mm |
Grade No.3 diameter |
4-8 mm |
Grade No.4 diameter |
8-12 mm |
Sand total height |
1 m |
Uniformity coefficient |
1.35 |
Sand filter vessels coating with epoxy and painting about 275µ thickness.
All geysers for filtered water are brass and the number of this geysers is about 50th in one square meter.