Extra Security Valves

Hi there

I doing a bit of detail design for a small hydro power station. The station is below water level, as it is a run of river type. Extra care needs to be taken to minimise the chance of flooding. There are a number of pipes passing through the station walls and into the station. The pipes are connected to the water feed race and tail race. If the valve body or spindle fails it could flood the station
I intend putting valves inside the station immediately where they come through the walls. The largest valve is 200NB (8"), and the smallest 32NB. The head is not high, around 10m. While butterfly valves would probably do for the larger valves, and ball valves for the smaller, I have the nagging feeling that I should be using something a bit stronger, possibly metal seated gate valves. not a super high spec valve, just something a bit better than rubber seated butterfly valves and teflon seated ball valves.

Has anyone any suggestions/experience?

Supplier/make/model details would be useful.

Thanks

Steve McKenzie Received on Thu May 16 03:36:00 2002