Figure 2: Filtration performance at removing 5 micron particles at different water flows
Dryden Aqua Ltd
Butlerfield-Bonnyrigg,
Edinburgh EH19 3JQ Scotland
Page 17 of 44
Pressure filters can operate at a higher water flow rate than RGF filters because a higher pressure is
available to push the water through the filter bed. However the differential pressure across the filter bed
should be limited to 4m head (0.4 bar or 6psi).