Filters
Types :
-
Pressure sand filters / Activated carbon filters.
Selection :
- Loading 10 to 15 cum/sqm/ hr.
Media arrangement in PSF & ACF :
- GRAVEL 1” – 100mm height.
- SILEX COARSE ½” – 100mm height.
- FINE SILEX ¼” – 100mm height.
- SAND – 450mm height.
- ACTIVATED CARBON – 450mm height.
Valve types for automatic operation:
- Solenoid Electrically operated
- Butterfly valves (actuator)
- Pneumatically operated
Air scouring rate
- 0.6 cum/ sqm/min
- for filters above 2 M diameter.
- MOC – MS / MS rubber lined vessel pipe line should be hot dip galvanized for protection from inside and for long life.
Test pressure :
- 5 kg/sqcm
- INLET – Inverted cone , more than one if higher diameter.
- OUTLET – Perforated cup / header lateral above 2 M diameter.
- Code : ASME, sec VIII or IS 2825
Latest trends :
- Dedicated PLC panel for the filters.
- Automatic operation for feed pumps, back wash pumps, filter valves.
- SS pipe line.
- Use of anthracite in sand filter making it a dual media filter