HOW DOES THE TECHNOLOGY WORK?
The Propeller Bead® filter has the most aggressive backwash of any of AST filters. Delivered by a motorized propeller that vigorously mixes the beads, the water enters through the side intake and exits from the top of the filter, trapping solids within the floating media bed.
When backwashing, the pump is turned off and the water inlet valve is closed. If the system is pressurized, it must be released before operating the mixing motor. The mixing motor is turned on for 15-45 seconds until the beads fluidize. The mixing motor is shut off and the solids are allowed to settle for ten minutes minimum. Opening the drain early risks losing beads, and the solids will not be drained. The sludge valve is opened, and the concentrated sludge is allowed to gravity drain from the filter. Backwash frequency is dictated by feed rate.
After sludge is drained, the sludge valve is closed and the inlet valve reopened. Turning the pump back on puts the filter back into normal operation.