Need a control valve that can resist wear from abrasive slurry

[anekial]

I need to find a control valve that can resist wear from abrasive slurry.
Currently the 6"X8" angle valve that is used for the application wears out every 5 months. We have experimented with ceramic lined 10"X8" angle valves, but they are easily broken, and very expensive. One valve costs US$23,000.00. Clarkeson valves were also tried, but the rubber continued to be eroded and blocked the lines.

 

[NAPB]

You can contact Valvtechnologies:

http://www.valv.com/catalog/

Good Luck!!!

 

[rmw]

Tough application. Try these people. I have used them to solve some really tough problems.

http://www.redvalve.com/rv/index.php

rmw

 

[Joesteam]

Try the Fisher V500 link

http://www.emersonprocess.com/fisher/products/tour/rotaryvalves.html

 

[stanier]

Can you provide more details of the slurry? All have a bearing on wear rate.

Solids Material
Carrier Fluid
d85 size of solids
sharpness or smoothness of solids
concentration Cw, Cv
Material density
Flow rate
Exit velocity
Temperature

 

[JimCasey]

Good comments, Stanier. I would have added Inlet pressure and outlet pressure to the list.

It was a very nonspecific question.

One valve would be right for 30 psi flyash slurry (Pinch valve) , but an entirely different one would be necessary for cat-cracker letdown ( Angle, extreme hardness venturi tailpiece, such as Valtek Survivor). Yet another valve would be best for potato-peeler service.(Eccentric Rotary plug, shaft Upstream)

The only hint that the application might be high-temperature/pressure is that they are using a 6 x 8 angle valve and that ceramic has given them limited success.

 

[joeswoes]

brittle failure of the ceramic lining can be due to the mechanical and/or thermal shock resistance of the ceramic lining. Alumina will readily fail, whereas partially stabilized zirconia will exhibit some ductility with little loss of abrasion resistance.

 

[stanier]

Good practical reference on slurry pipelining is Slurry Transport Using Centrifugal Pumps Wilson Addie etc.

 

[Ashereng]

A rubber/soft material pinch valve maybe?

If hard doesn work, sometimes, soft does?

"Do not worry about your problems with mathematics, I assure you mine are far greater."
Albert Einstein
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?

 

[steeleclipse]

Gosco Valves

http://www.goscovalves.com/

You will have to check if it is right for your application, but I know they have severe service control valves, and they talk a lot about slurry experience in their sales literature.

 

[bzandy]

anekial, each anti-abrasive valve you are using costs 23,000.00 USD? what kind of valve looks like? do you have the exact working condition, please share them with people here! As stanier commented above, slurry has many parameters, so please pop up your working condition in detail. Anyway, you can get some information from

http://www.shengkai.com.

good luck

 

[decoyshooter]

We use Fisher “Stellighted – V-Balls” and install them backwards. That way the ball open to the rounded side of the actuator and you get better life from the valve