Pulp can be difficult to transfer because its fibrous structure, uneven consistency, and tendency to settle may lead to blockages, wear, and unstable flow. In paper production, these issues can affect both process efficiency and final paper quality. Diaphragm pumps are well suited for pulp handling because the reciprocating movement of the diaphragm changes the pump chamber volume to draw in and discharge the medium in a controlled way.

This positive displacement principle is suitable for fluids that contain fibers, particles, or higher viscosity. The diaphragm also keeps the pulp separated from the driving mechanism, reducing the risk of leakage and contamination during transfer.