Onesteel in AUstralia is marketing a valve made in Adelaide that we are atandardising a mjor roll out of pumping station for Sydney Water. These a flexible seated sluice valve. tel 61 2 9756 4466 Keith Crinnion.
You could always put two in to give you double isolation. --- smckennz <Mechproj@xtra.co.nz> wrote:
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<tt>
<BR>
Hi there<BR>
<BR>
I doing a bit of detail design for a small hydro power station.<BR>
The station is below water level, as it is a run of river type.<BR>
Extra care needs to be taken to minimise the chance of flooding.<BR>
There are a number of pipes passing through the station walls and <BR>
into the station. The pipes are connected to the water feed race and <BR>
tail race. If the valve body or spindle fails it could flood the <BR>
station<BR>
I intend putting valves inside the station immediately where they <BR>
come through the walls. The largest valve is 200NB (8"), and the <BR>
smallest 32NB. The head is not high, around 10m. While butterfly <BR>
valves would probably do for the larger valves, and ball valves for <BR>
the smaller, I have the nagging feeling that I should be using <BR>
something a bit stronger, possibly metal seated gate valves. not a <BR>
super high spec valve, just something a bit better than rubber seated <BR>
butterfly valves and teflon seated ball valves.<BR>
<BR>
Has anyone any suggestions/experience? <BR>
<BR>
Supplier/make/model details would be useful.<BR>
<BR>
Thanks <BR>
<BR>
Steve McKenzie<BR>
<BR>
<BR>
<BR>
</tt>
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