Shut off valve for abrasive material

[Speedy]

Hi folks,

I am looking to source a shut-off valve for a highly abrasive material,(and I mean highly abrasive).

At this stage I want to look at designs etc.

Any comments appreciated.

Speedy

 

[sreid]

Let me suggest a diaphragm valve to "test the water" if this is anything close to what you require.

http://www.plastomatic.com/bsd.html

 

[macmil]

More information would be desirable to receive meaningful answers;
e.g. dry; wet ( if so % solids) temperature size any chemical / corrosive complications quantity / volume intermittent / contiuous critical application /
etc
mac

 

[sreid]

speedy,

What macmil said.

 

[stanier]

A number of options.

Red valve make a series of rubber valves for slurry service. These are pinch valves.

Valve technologies have a ceramic coated ball valve designed for severe service. This has been used on slurries and boiler blown down.

The abrasion intensifies as the valve closes and the velocity increases for the last portion of closing.

 

[CanuckMiner]

Another possibility:

http://www.mogas.com

Cheers,
CanuckMiner

 

[arunmrao]

http://www.unicast.ab.ca

Gerry Lesperance, he should be able to deliver an abrasion resitant valve as he builds a valve with abrasion resistant materials.(high chrome irons). Please remember to refer my name to him.

 

[Cockroach]

I have designed ball valves for use in the Alberta oilpatch, Tar Sands Projects out of Fort McMurray. The slurry is sand and can have trace sour gas with the tar bitumen.

You're talking metal seated, trunion with a boronized ball. The ferric boron matrix is integral to the steel and therefore does not flake or chip off. The only thing you need consider is sensitivity to shock impact, the ball tends to shatter like glass if hit with enough energy.

Ball geometry is also a factor since the boronizing process is run at elevated temperatures. You risk loosing spherical diameter, so the ball must be packed in such a fashion as to minimize sag under it's own weight.

I found the Grove product line ball geometry to favor the boronizing process, well up to NPS 36. Expect seat lifetime to be approximately 66% to 75% that of a clean environment.

Hope this helps.

Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada