Wedgewire Filter Screens – Construction and Flow Direction

HD Process supplies wedgewire screens for right angle filters, including the 601 and GS ranges, as well as Y-strainers and self-cleaning filters. Wedgewire screens retain solids through uniform slots formed between wedge-shaped wires.

The wires are welded to support rods, commonly forming a hollow cylindrical insert. Compared with perforated plate and mesh inserts, wedgewire screens can offer greater resistance to pressure spikes and differential pressure caused by retained solids.

Wedgewire Slot Orientation

The wider face of each wire faces the incoming flow. The gap between adjacent wires widens behind the filtering surface, helping particles that pass through the slot continue through the screen.

The photographs show examples of cylindrical screens and slot construction. Slot dimensions shown in individual examples do not apply to every wedgewire insert.

Inside-to-Outside and Outside-to-Inside Flow

• Inside-to-outside flow: solids are retained inside the cylinder, while filtered liquid passes into the surrounding housing.
• Outside-to-inside flow: solids are retained on the outer surface, while filtered liquid passes into the cylinder and exits through its outlet.
• Screen orientation must match the intended flow direction so the wider wire face presents the filtering surface to the incoming liquid.

Contact HD Process to confirm the appropriate wedgewire insert and flow configuration for your filter.