EWT CastKleen - Filter Underdrain System
By combining a rapid-fit, floor forming system with the consistent flow management of Flexkleen nozzles, the cast-in-place Ovivo Castkleen underdrain offers substantial savings over other methods of granular media filter construction, cuts installation times with larger underdrain panels and reduces maintenance costs while improving media scour.
The Ovivo Castkleen underdrain cuts installation costs and boosts backwash performance. By combining a rapid fit floor-forming system with the consistent flow management of Flexkleen™ nozzles, the cast-in-place Castkleen underdrain offers substantial savings over other methods of granular media filter construction, cuts installation times with larger underdrain panels and reduces maintenance costs while improving media scour.
- Gravity filtration
- Tertiary filtration
- Traveling bridge filters (modified floor)
- Granular activated carbon (GAC) filtration
- Filtration following lime softening
For an air scour backwash to be effective, air must be evenly distributed throughout the media bed. Inconsistent cleaning leads to uneven filtration flow and the need for more frequent backwashing and declining filter throughput. The key to uniform air distribution is the careful placement of all air intake ports at the same elevation. In most underdrain systems, this is accomplished by a labor-intensive process of floor leveling. The Ovivo Castkleen® underdrain system, with an adjustable tailpiece on the Flexkleen diffuser, is a different approach without the need for expensive floor leveling or finishing. The key to uniform air distribution is the placement of the air orifices at the same elevation. The tailpiece is adjustable from above so the elevation of the air orifices can all be the exact same elevation with minimum effort, even with an uneven floor.
- Non-corroding components
- Monolithic structure
- Evenly distributed backwash and air scouring air flows
- Convenient and easy access to filter plenum
- Metric size underdrain panels for International projects.
With the Ovivo Castkleen underdrain system, the media is rapidly cleaned, using less water and with uniform distribution.
The Castkleen underdrain system utilizes a concrete floor with reinforcing bars and Flexkleen nozzles cast in place. The spacing of the nozzles, design of the multiple slots distributing the air and/or water, ease of adjustment for level and the headloss generated through the nozzle ensures uniform distribution and uniform cleaning of the filter media.