Twilled mesh gives the smallest apertures for monofilaments as well as a smooth mesh surface, whilst the larger material diameter gives higher levels of mesh stability. To pass through the mesh, particles must negotiate five offset pore levels. This means that even elongated, thin, rod-shaped and filamentary particles are reliably retained.
These meshes are used at fine specifications for fine filtration such as pressure filters in hydraulic steering equipment and fuel filters in critical applications. Coarser specification twilled meshes are used in pressure and vacuum filtration (disks, battery and drum filters) and as a porous medium for fluidised bed applications.