Application range | - Process water, waste water, sewage sludge, slurry and other biomasses
- They differ only in the material of the rubber bellows from the ERV special types with the coloured rings. As a result, the media and temperature resistance is limited. As regards the normal water, environment and ageing resistance, as well as the noise and vibration damping and the permitted range of movement, they are comparable with the ERV special types
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