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Fairbanks Nijhuis

Fish Friendly Pumps

The Fairbanks Nijhuis patented fish-friendly pump allows 100 percent of the eels and at least 97 percent of the fish to get through a pumping station unscathed. The pump was developed in response to the adverse effects of conventional pumps in pumping stations on the fish stock.

By choosing Fairbanks Nijhuis; you have a sustainable solution that protects the wildlife and environment and saves energy. We are ready to assist you with converting your pumping station pump into a fish-friendly system.

Creation of a fish friendly pump

Features

  • High pump efficiency 
  • Available in horizontal and vertical configuration, both dry and wet mounting
  • Easy installation in existing pumping stations 
  • Converting costs substantially reduced

functional description

The fish friendly pump was developed in response to the adverse effects of conventional pumps in pumping stations on the fish stock. A substantial part of the fish mortality is caused when fish collide with the impeller blades and/or guide vanes when passing through conventional pumping stations. Furthermore conventional pumps greatly interfere with the innate migration of fish, and the eel population is especially threatened.

Optimized fish friendly design
The impeller and guide vanes of the fish friendly pump have a special design, that creates an optimal water flow, allowing the fish to pass through the pump safely. In addition, all edges are rounded and the space between the impeller blades is much wider, which substantially reduces the impact risk, with minor effects on the efficiency.

High efficiency
Fairbanks Nijhuis builds pumps according to customer’s specifications for the specific operation. Fish friendliness is guaranteed while the efficiency is optimized. Our fish friendly pump provides a pump efficiency of more than 80 percent at the design point.

Easy installation
The fish friendly pump can be made customized to fit into an existing pumping station, and thus reduce or avoid structural adaptations.

Reduced operation costs
In most cases the existing infrastructure remains unmodified when overhauling pumping stations. In addition, due to the optimized pump design most existing electrical systems can be used and don’t need to be extended. These facts substantially reduce the costs of converting your existing system into a fish-friendly system.

Reduced maintenance costs
The lower speed of the pump positively affects maintenance requirements and service life: the pump is less vulnerable to clogging or damage to coating, bearings, etc.

No auxiliary systems needed
No auxiliary systems, like fish ladders needed to facilitate fish migration. This saves costs and provides low impact on visual amenity, also through the invisible installation of the pump in most cases.

Fish friendly pump

Specifications

  • Available in vertical and horizontal configuration, both dry and wet mounting    
  • Application in natural open water systems where the operation requires relatively low pressures and high capacities for flood control
  • The default capacity varies between 1,500 and 180,000 m3/h. A higher capacity can be realized for special applications.
  • The head size varies between 1 and 8 meters. This is the usual range for applying conventional propeller pumps.

Capacity: 6604 - 792,516 GPM (1,500 - 180,000+ mlc)
Head: 3 - 19 feet (1 - 6+ mlc)

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