Special designed HP – pumps can be used homogenizing liquids.
A HP – pump pressurized the liquid to be treated and then expands it with a special designed let down system. In the let down system the liquid is exposed to extremely high mechanical forces, which will change the properties of the liquid.
This kind of homogenisation very often is used in food industry. HP – pumps used in food industry must have a complete separation of the hydraulic oil system from the high pressure system. Therefore in food industry only pumps with stand off can be used for homogenization.
In order to achieve a constant pressure in the let down system an attenuator is required  in the HP - loop.