HI Mr Shabab

   I can supply you from China used for Hydraulic Turbine Generator
with Hydraulic
Counter Weight Closing for load trip rejection or overspeed trip.

   Motorize with manual hand wheel are seldom used now a days but we have also
what voltage do you need and frequency


Regards


Art


On 10/24/11, shababwahid <shababwahid@yaho...> wrote:
> dear all
>
> for one station of 1 megawatt capacity fracncis unit we need one inlet valve
> PN 25 and DN 500 mm and the length is 350 mm with gear box for manual
> operation to shut on/off. we would like to know which is the best chinese
> valve manufacturer?
>
> we have also experienced that for manual operation european valves close
> faster than chinese valves for the same pressure and capacity.Is it better
> gear design ?
>
> regards
> shabab
>
>
>
>