Pumps and motor pumps

Submersible electric pump
Flow rate 19,8 m3 / h

Thermal motor pump for charged waters
Flow rate 60 m3 / h

Floating motor pump for charged waters
Flow rate 144 m3 / h

Pumping of seepage water

No mobile flood protection system is completely waterproof. The very surface on which the dam is laid is not 100% watertight.

It is imperative to combine the Water-Gate © flexible dams with pumping means.
As on a boat the principle is to collect the trailing water, at the low point downstream of the flexible dam and to reject them over the ridge.

The leakage rate depends on many factors:

  • Underground pipes
  • Type of soil
  • Obstacles on the ground
  • Retention height (hydrostatic pressure)
  • Quality of implementation
  • Pluviometry

We calculate a leakage rate with safety margin for each installation.
We recommend the use of self-priming pumps or low level residue pumps coupled with generators.



No mobile flood protection system is totally watertight. We provide pumping solutions to collect water that has seeped through and discharge it beyond the dam: self-priming motor pumps or submersible pumps coupled with generators.

MegaSecur has developed a tailor-made spillway for lightweight discharge (DN 450). With no pump, it is environmentally friendly and features a flexible pipeline for downstream discharge. Several spillways can be positioned side-by-side if necessary.

Perfectly adapted to the complementary ballasting of the Water-Gate © barriers: 15 KG / linear meter. Robust and easy to handle (three handles), they are easy to load and unload in water: polyethylene mesh.

The Water-Gate© filtration dam combines the advantages of flexible cofferdams and natural straw. It allows the water to be decanted and filtered according to its turbidity.