1. Hydraulic steelwork

The steel welded construction with continuously welded screw blades ensures high stability. Its solid construction and generous use of material ensure a long service life. The gap-free design makes injury-free fish ascent possible.

2. Substructure

The environmentally and fish friendly HYDROCONNECT ascent screw is installed in a concrete structure or steel frame. The design is very thin and therefore only requires a small amount of concrete and space.

3. Fish ladder and attraction current

• The fish transport is based on Archimedes’ principle: Fish are raised effortlessly upstream in the standing water of the screw chamber.
• special shape of the screw blades to create an optimised guiding current
• bottom connection for weak swimming fish such as the bullhead, for example

4. Mounting

• Top: an axial self-aligning roller bearing accommodates the axial forces
• Bottom: the radial forces
  are accommodated by belts or rollers

5. Generator works

• Geared motor
• Brake

Variable rotation speeds can be used through the implemented frequency converter technology

6. Fish discharge chute

• chute to transport the individually ascended fish into the calm headwater
• minimum slope
• can be disassembled

7. Compensation water protection

• Steel protection for regulating the amount of compensation water
• Compensation of headwater level fluctuations
• Seasonally dependent compensation water quantities
• Fish descent possible
• For bigger locations, the water can be used as a guiding current
• The compensation water protection is controlled by level sensors and water quantity specifications

8. Cover/housing

If, due to the place of use, there is a need for a cover, then it can be realised using wood, glass, stone, concrete or other materials. The belt capstan and generator works are covered as a standard feature for safety and protection against external environmental influences. Generally, no complete covering of the system is necessary.