# Slurry

SLURRY S061

A slurry is defined as solids in liquid.

It is impossible to define when the quantity and size of the particles becomes too much for a mechanical seal because the design of some mechanical seals incorporate non-clogging seal features.

If the fluid you are pumping is a mixture of a liquid and a solid we have a useful formula to calculate the specific gravity of a slurry:

• Sm = Specific gravity of the mixture or slurry
• Sl = Specific gravity of the liquid phase
• SS = Specific gravity of the solids phase
• C= Concentration of the solids by weight

The formula for the concentration of solids by weight (Cw ) is:

Here is an example of a typical mixture:

You have a water and solids slurry. The water is a liquid with a Specific Gravity of 1.0 and the % solids by weight is 30%. The solids having a Specific Gravity of 2.7, then:

See:

• Speed limits for slurry pumps, S074
• Slurry pumps, S062
• Slurry sealing, SA010,
• Non clogging seal features, N008

### Posted

• On February 17, 2018