Re: Slurry Pump Suction Liner Wear

Sounds odd - but a good opportunity to play detective..
Are you at the same fluid flow with the larger diameter discharge pipe?
What kind of pump are you using - (I'm assuming a diaphragm pump)
What is the solids loading?
What is the wear pattern?
If the fluid velocity decreased you could get partial settling in the pipe.
The increased solids at the bottom of the pipe may not be enough to cause
clogging, but it might increase the solids enough so slurry becomes dilatant
during part of the pumping cycle - increases wear.
If you increased the fluid flow with the larger diameter outlet, the slurry
may be experiencing shear rates in the dlatant regime during the pump cycle
with out any settling.
Or - depending on your answer to the initial 4 questions - none of the
above.

Good Luck
Gregg
"dkichton" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Anyone experience excessive erosion wear (pumping a heavy sand slurry)
> on slurry pump suction liners.  We had been testing a urethane product
> with great success, then changed the discharge piping from 20" to 24"
> diameter and reduced our suction liner wear from 52 weeks to 4 weeks.
> Process conditions have not varied that much.  Any comments would be
> appreciated.  Pumping a slurry density of 1.4 gms/ml, 16000 usgpm,
> discharge pressure of 300 psig.