Stainless Steel Filter Screens

Define the Profile and Layer Construction

Circular, annular and semicircular screens; relative sizes are illustrative

Flat screens include round, rectangular, semicircular, waist shaped, hollow and custom profiles. Single layers and spot joined multilayer packs are offered, using woven mesh, Dutch weave or sintered fibre. Dimensions and layer count are customisable.

Formed Bowl Screens

Bowl shaped screens are available in single or multiple layers. Add formed depth, wall profile and seating details to the component drawing.

Fit and Support

Confirm that the screen is seated and supported across its working area. Keep the layer sequence and flow orientation linked to the equipment drawing.

Bonded Mesh for Dimensional Stability

Sintering bonds wire contact points through a controlled thermal process. Combining a filtration layer with coarser supporting layers can produce a rigid porous laminate.

Representative sintered screen and mesh samples

Bonding and Structural Support

The filtration layer and the supporting layers perform different functions. Specify the entire laminate, its orientation and the unsupported span. Sintering improves cohesion, while the final strength also depends on the support and component geometry.

Qualify the Finished Component

Request the retention test basis, clean flow resistance and allowable differential pressure for the supplied laminate and assembly. No universal micron, pressure or temperature rating is stated on the catalogue.

Different Constructions for Different Duties

Mesh cylinders may be single or multilayer, with smooth or pleated surfaces. Media include woven mesh, Dutch weave and sintered fibre.

Smooth And Pleated Filter Cylinders ● Two Ways to Form a Cylindrical Surface

For cylindrical parts, define diameter, length, seam, end connections, support core and flow direction. Calculate the effective media area from the finished construction; pleat count alone does not define usable flow area.

Compressed Knitted Mesh Washers

Representative compressed knitted wire rings and a cylindrical part

Knitted wire can be die compressed into rings, discs and other forms. Wire selection and density are important design variables. SUS304, SUS316, nickel, titanium and copper materials are available

Define the Function

State whether the part is required for filtration, separation, damping, sealing or shielding. Specify the acceptance test for that function; a knitted mesh washer does not have an implied woven mesh micron rating.

Specify More than a Mesh Number

Square aperture mesh: wire diameter d, opening w and pitch p

For regular square aperture cloth, wire diameter and pitch determine the clear opening. Measure aperture over multiple pitches where appropriate and record the weave with the dimensions.

p = 25.4 / M; w = p − d; Open area (%) = 100 × (w / p)²

M = mesh count per inch; p, w and d in mm. Relationships for square aperture mesh.

Calculated geometric examples, not catalogue grades. They exclude rims, joints, supporting layers and layer overlap. Confirm available mesh combinations and tolerances.

Same mesh count, different opening. The two 100-mesh examples show why wire diameter must accompany mesh count: the clear openings are 154 µm and 174 µm respectively.

Dutch Weave, Fibre and Multilayer Media

The square opening formula does not determine the retention rating of Dutch weave, fibre felt or a completed multilayer pack. Obtain the specified retention efficiency and test method for the actual medium.

Match the Screen to the Operating Process

Polymer filtration needs vary with contamination load, gel behaviour and melt properties. Screen packs and filter discs should be selected as complete media arrangements for the process.

Fluid and Contamination. State polymer or liquid grade, viscosity basis, temperature and flow range. Describe solids, gels or other contamination, the current filter and the required improvement.

Retention and Resistance. Define particle size, removal efficiency and the accepted test basis. Evaluate clean pressure loss and pressure rise as the screen loads; include support plate and layer stack resistance.

Mechanical Construction. Supply the drawing, material grade, thickness, media sequence, joining details and support arrangement. Confirm working pressure, allowable differential pressure, transients and change out limit.

Manufacturing Acceptance. Agree profile tolerances, weave or media identification, edge condition, joining inspection, cleanliness, packaging and traceability. Link any supplied sample to a drawing revision.

Trial and Maintenance

Compare candidate screens at matched operating conditions. Record initial pressure drop, pressure rise per hour or tonne, run duration and downstream quality.

For spinning, track spinneret blockage and filament breaks; for film, use the agreed defect measure.

Where reuse is intended, validate the cleaning method against the medium, deposits and finished construction. Post cleaning flow and integrity checks should use an approved baseline and acceptance criteria for that filter design.

Complete the Enquiry

Include quantity, annual consumption, delivery requirement and documentation. Obtain confirmation of the finished screen’s material, retention and operating limits before approving the supply specification.