Try Tyco Water (Keystone) who are represented in NZ.
Manufacture is in Australia. Also John Valves
Australia, One Steel Australia Keith Crinnion, Flotech
61 2 9499 4888 tel Ron Rodrigues,
- Steve McKenzie <Mechproj@xtra.co.nz> wrote:
<HR>
<html><body>
<tt>
Hi<BR>
<BR>
I am looking for a knife gate valve for a mining
slurry application. I would like it within 4
weeks.<BR>
The delivery point is in New Zealand, but air freight
is not a problem.<BR>
<BR>
The size is 350NB, or 300NB would do if absolutely
necessary.<BR>
Pressure rating is 21bar. Operating pressure is
normally around 17bar and the valve must be capable of
opening against 21 bar differential pressure.
Anticipated max flow is 420l/s. Natural rubber and
stainless steel have proved suitable wetted materials
for the slurry which is sulphide ore gold mine
tailings D50 = 60 micron. An air actuator 5-10bar
min/max pressure is suitable and it would be and
advantage for this to be supplied with the valve. I
prefer to use the actuator oil filled with separate
air over oil accumulators to give smoother adjustable
actuating speed. So actuator internals should be
hydraulic oil compatible.<BR>
<BR>
The valve will be used for dumping the tails line if
there is a failure or planned shutdown so the duty is
occasional but severe.<BR>
Clarkson valves are believed to be of suitable quality
and probably L&M valves also. Keystone fig955
valves only go to 16bar.<BR>
<BR>
Local valve suppliers tell me that this valve would
have to be manufactured which would take at least 6
weeks (ex USA). I would have thought there must be a
reasonably priced "off the shelf" supplier
somewhere.<BR>
<BR>
Can anyone help source a good supplier?<BR>
<BR>
Cheers<BR>
<BR>
Steve McKenzie<BR>
<BR>
<BR>
[Non-text portions of this message have been
removed]<BR>
<BR>
</tt>
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Received on Thu Nov 22 03:10:00 2001
