Slurry Control Valve

a slurry is a lot different than a solution. you can get valves/pipes for all fluids just add $$$

this is easily googled

sedimentation of foriegn particles says that slurry.Its not a solution.you can use CI pipe along with CI valve.

Binoi.S

Concentrated Sulphuric acid of about 98 or 99% is not that corrosive as diluted acid. Most of the industrial valve could be used considering service requirements like pressure, purposes like control or on/off and like.

With glanded valves the main problem is around the gland area. The tiny ooze is good enough to corrode gland, yoke and bonnet area.

Ball valve best suited for concentrated acid.

If the operating pressure and temperature are less, 'Diaphragm Valves' will be best suitable even for diluted acid. Varity of lining materials and diaphragm material are available for various concentrations.

Thanks for the response. I came upon a Bianca Butterfly Valve with Ultraflon lining. I am about to use this in copper slurry with the pH less than 2. will you guide me as to what parameters i have to consider

Do you mean a slurry i.e. with suspended solids? If so, what are they and size range? Also what sort of valve diameter are you after, and what pressure drop across the valve?

Having said that, eccentric plug valve is often a good choice. It withstands abrasion, it's non-clog, and you can control flow with it. Also it's quarter-turn, so the actuator (assuming auto control) is cheaper than a multi-turn type.

Fisher Valve is a good contact, In papermills ( if you have any in your area ) uses this type of application throughout there plants. Contact ther E & I department and they could tell you what works best for them.

In coal oil flow streams at 800 deg F and 3000 psig the life expectancy of most valve trims is measured in hours. Viscocity drops from 200 Cp (above) to 2000 Cp at 100 deg F. This has always been a major problem in making oil from coal. I've seen flowrate drop to a trickle when a section of insulation was not replaced properly.

If the stream you mentioned has very high viscocity swings you may be able to control flowrate by cooling a section of piping based on flowrate. If tight shut-off is required any number of valves can be used without the danger of seat erosion.