EGAR panelWith an underwater blockage the water-level difference is recalculated and the desired flow rate controlled. To avoid hydraulic overload of sewerage systems and waste water treatment facilities, storm water retention systems must be created. They are required to store large quantities of combined sewage and rainwater during storm conditions and regulate the flow to match the capacity of the sewerage system or the receiving treatment plant. To protect the subsequent facilities a suitable technical solution is required to guarantee the pass forward flow rate. The objective is to maintain a constant guaranteed pass forward flow rate irrespective of the level in the detention system. If (during) the regulation process a blockage occurs, the flow rate is inevitably reduced. This leads to an automatic actuation of the control plate and if required the full opening of the regulator. After the flushing of the orifice and the instantaneous increase in flow the penstock returns to its regulating position.

Short function description

In dry weather the regulator is completely opened. If the water-level exceeds a certain height during storm conditions the regulator is activated. The electrical drive is actuated and closes the regulator mechanism until it has matched the desired top water level control plate position. The electronic control system constantly compares the measured water level with the programmed pass forward flow rate. The regulation process continues until the top water level in the basin drops below the preset level. If this is the case, the regulator will be automatically opened completely so that full flow is available. If (during) the regulation process a blockage occurs, the flow rate is inevitably reduced. This leads to an automatic actuation of the control plate and if required the full opening of the regulator. After the flushing of the orifice and the instantaeneous increase in flow the penstock returns to its regulating position. With an underwater blockage the water-level difference is recalculated and the desired flow rate controlled.

  • ideal for wet, semi-dry and dry installations (without head loss)
  • blockages cleared automatically
  • consistent outlet flow rate irrespective of head
  • recalibration on site possible if flow conditions alter
  • automatically passes first flush
  • easy to retrofit

Dimensions

The electronically controlled flow regulator Type EGAR can be manufactured in the sizes DN 100 up to DN 1000 for desired flow rates from 2 l/s to 2400 l/s. Other sizes and flow rates available upon enquiry. The regulation process continues until the top water.