Slurry Service Valve

[Fetsch]

What type of valve will be able to throttle in a slurry service? The slurry is a saturated ash water with a pH of 13.5, total solids of 200000 ppmw, and TSM of 5200 ppmw. We have used standard ball valves in the past which don't last very long. We recently tried elastomer pinch valves which were highly recommended for slurry throttling services but failed after 4 months. Any recommendations on exotic material ball valves or something else that may work?

 

[stanier]

Severe service ball valves by Valvetech used in Australia for 75% flyash.

These valves are coated with ceramic coating.

http://www.flotechcontrols.com.au

 

[moltenmetal]

Maybe a ceramic choke valve? These are made principally for flashing services for slurries, but will probably do the job. Expensive though. Valtek (Flowserve) and Caldera are two manufacturers to speak to.

 

[joeswoes]

Consider an UHMWPE-lined butterfly valve, you eliminate the cavity of a ball valve, keep the 1/4 turn stroke, and isn't much more money and vastly superior for erosion/corrosion.

 

[itdepends]

I'd second the UHMWPE valve as long as you don't gag it too far (appropriate valve sizing).

Ensure you have a hard lined replaceable spool downstream or get a long body valve or you may chop out the piping immediately downstream of the valve in short order.

 

[rmw]

Google a valve called Red Valve. They may have something that would work in your application.

rmw

 

[joeswoes]

Red Valve is a pinch valve, he says they fail in 4 months

 

[rmw]

Are they the ones that failed? I only recommended them because sometimes one manufacturer will have a better mouse trap, and I have seen their valves used in some really abusive ash handling service with reasonable results.

If they are the ones laying in your scrap pile, then forget it.

rmw