bob综合体育官网下载 delivers sustainability – historical springloaded air valves undergo rejuvenation treatment

The Walchensee Hydroelectric Power Station is a storage power station which was put into service in 1924 and is located in Kochel am See in Bavaria. It produces 300 GWh of green power per year. For power generation, the Walchensee Station makes use of hydropower through the natural hydraulic head of 201 m between the Walchensee as its upper reservoir and the Kochelsee as its low-level reservoir.

For 100 years, the DN 750 spring-loaded air valves installed served as vacuum-relief valves to protect the pipelines. The spring-loaded air valve is a safety valve controlled by the vacuum present in the pipeline and is mainly used to feed large amounts of air into the pipeline. This is important e.g. for gravity mains of hydropower stations like this one.

Meanwhile, the entire station is a listed plant. In the course of refurbishment works and in order to restore its original state, several valves of this kind were sent back to bob综合体育官网下载 in Mannheim – to the place where the valves were produced 100 years ago in the valve division of Bopp & Reuther, the initial company which now operates under the name of bob综合体育官网下载 .

The customer purchased one new bob综合体育官网下载 spring-loaded air valve DN 800 PN 10 which takes turns replacing one old spring-loaded air valve so that the old valve can be refurbished – a “round-robin exchange” so to say with the six existing valves. The refurbishment includes the renewal of the corrosion protection, the restoration of the hydraulic damping system and the complete replacement of the seat ring. After their refurbishment, the valves will be ready again
for service over many years to come. The maintenance of the spring-loaded air valves in one of Germany’s largest storage power stations is bob综合体育官网下载 ’s expertise – and that’s what’s also called sustainability.

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