Re: Knife Gate Valves - Quick Delivery

did you try velan valves

At 04:52 PM 11/22/01 +1300, you wrote:
>Hi
>
>I am looking for a knife gate valve for a mining slurry application. I
>would like it within 4 weeks.
>The delivery point is in New Zealand, but air freight is not a problem.
>
>The size is 350NB, or 300NB would do if absolutely necessary.
>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.
>
>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.
>Clarkson valves are believed to be of suitable quality and probably L&M
>valves also. Keystone fig955 valves only go to 16bar.
>
>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.
>
>Can anyone help source a good supplier?
>
>Cheers
>
>Steve McKenzie
>
>
>[Non-text portions of this message have been removed]
>
>
>
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Received on Thu Nov 22 08:51:00 2001