Energy saved at stormwater pump station with WaStop in Sweden

Stockholm Water| Stockholm, Sweden| Flood protection

The problem

In Stockholm, one of the city's most venerable stormwater pump stations, designed to elevate water by a few meters, was originally equipped with two metal flap valves. However, these valves proved to be less than optimal in their performance. When the pump was inactive, water would seep back into it due to the malfunctioning flap valves, leading to significant damage.

This recurring issue not only resulted in escalating repair costs but also necessitated the pump to operate more frequently than required, leading to increased energy consumption.

Additionally, the pump station became a source of noise pollution for the local community. Each time the pump ceased operation, the metal flap valves would slam shut with a loud clang. This repetitive noise disturbance became a significant annoyance for nearby residents, further underscoring the need for a more efficient and quieter solution.

Wastop Backventil

Solution

WaStop® Inline Check valve

In response to the challenges faced by the stormwater pump station in Stockholm, Wapro proposed the WaStop DN700mm as an innovative solution. Recognizing the importance of a seamless integration, the team took precise measurements of the existing opening and flange.

Subsequently, a tailor-made WaStop was crafted to align perfectly with the pre-established conditions. Notably, this custom WaStop was designed shorter than the standard models, and its flange was strategically positioned at the valve's midpoint.

This meticulous design ensured that the valve could be installed without necessitating any modifications to the existing infrastructure.

Since its installation in 2006, the WaStop valve has showcased exemplary performance. It has remained operational without necessitating any repairs, a testament to its durability and efficiency.

The valve guarantees a 100% seal, ensuring no backflow, and operates silently, eliminating the noise pollution issue that plagued the residents.

Furthermore, WaStop valves are renowned for their minimal head loss, a significant improvement over traditional flap valves. Impressively, they can handle a back pressure of up to 5 meters. Given the multifaceted challenges at this location, the WaStop proved to be an ideal, holistic solution, addressing each concern effectively.

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