High shear grout plant
High shear grout plants are usually not the first choice for grouting services. In addition to wear and tear, some people may have difficulty handling the wide range of pressure outputs that are often required. Although similar pumps are used in some grouting mixers, they run more or less at a constant speed, and their limited use makes it not worthy of further details here.
The piston of the high shear grout plant reciprocates in a closely matched cylinder.
Those used for grouting are usually double-acting: when the piston moves in one direction, the grout is discharged, and suction is formed on the other side, pulling the grout into preparation for the next discharge stroke. When inflow occurs, a check valve must be used to close the outflow port, and vice versa. The basic layout is shown in the figure.
High shear grout plant is usually more compact and more portable than pumps with external motors. Pumps with more than two cylinders tend to place the cylinders side by side, similar to a car engine, where the piston is powered by the crankshaft. When working hard, most of them vibrate and must be well fixed on the engine bed or some other solid base.
