We are looking for a 6" (DN 150) PN 250 ball valve for a test stand (pure water). Valve shall be electrically driven plus option manually actuated. EN or ANSI flange doesn't matter. Does somebody know a reputable manufacturer? It shall be a ball valve (full ball or half sphere).
Recommendation: Change the type from ball valve to regulation valve to get softer openeing and closing. (Capacity and closing/opening time to be considered). Cavitation to be considered with ballvalvlve?
Above on the presumtion that water shall pass through the valve at some (higher pressure).
This will open the range of suppliers.

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