A perforated filter support core is the load-bearing and drainage structure behind a flexible or pleated filtering medium. It keeps the media in position, transfers differential-pressure loads and provides a flow path to or from the clean side of the element.
Perforated metal screensShare a drawing, reference sample or application requirements to discuss the configuration.
Perforated cylindrical support with a longitudinal seam.
| Parameter | Specification | Notes |
|---|---|---|
| Perforation | Hole shape, pitch and open area agreed for the support duty | — |
| Support structure | Rolled perforated sheet with defined thickness | — |
| Longitudinal seam | Butt, overlap or drawing-defined longitudinal joint | — |
| Material | Stainless steel grade or specified alloy agreed for the application | Confirm compatibility of media, supports, connections and joining materials with the process and cleaning chemistry. |
| Dimensions | Manufactured to the approved drawing and agreed tolerances | Provide outside and inside diameters, length, wall thickness, end condition, roundness and mating-part tolerances. Define whether the core supports inward or outward pressure. |
| Service conditions | Process medium, temperature, flow and differential pressure to be specified | Limits depend on the complete construction; no universal pressure or temperature rating applies. |
| Inspection | Dimensions, media identification, joints and visual condition | Special tests require an agreed method, sampling plan and acceptance criteria. |
| Order basis | Quantity, sample stage, documentation and packing agreed at quotation | Lead time and minimum order quantity follow the confirmed material and manufacturing scope. |
| Specification example | Example support perforation: Ø3 mm | — |
Materials: Stainless steel grade or specified alloy agreed for the application
A perforated core supports the filter medium and provides passages for the fluid. It is not a fine filtering layer unless its holes themselves meet the required separation duty. Hole size, open area, wall thickness, seam and end support must be considered together; maximum open area is not always the strongest construction.
Provide outside and inside diameters, length, wall thickness, end condition, roundness and mating-part tolerances. Define whether the core supports inward or outward pressure.
Review differential pressure, buckling risk, flow distribution and contact with fine media. Burrs and protruding joints can damage the filter layer, so surface and edge requirements belong on the drawing.
Confirm the drawing revision, material designation, critical dimensions and inspection documents before manufacture. Agree how media identity, joints, edges and cleanliness will be checked. If a sample or first article is required, define the approval step before repeat production. Flow, pressure or retention testing must include the test method and acceptance limit; appearance alone does not verify filtration performance.
Internal support for pleated or cylindrical media, matched to the load direction.
Outer protection where handling or external contact could damage the filtering surface.
Perforated bodies used with a separately specified mesh liner.
Include these details when discussing your requirements.
Usually it serves a structural function. Fine separation is provided by the specified mesh or other medium unless the perforations are expressly designed as the filtering openings.
Provide the process fluid or gas, temperature, cleaning chemicals and corrosion exposure. The grade must suit every wetted component, including supports, joints and seals. Final compatibility is confirmed against the actual service conditions.
Provide outside and inside diameters, length, wall thickness, end condition, roundness and mating-part tolerances. Define whether the core supports inward or outward pressure. Also include material, operating conditions, required quantity and any sample or inspection-document requirements.
Material records, dimensional inspection and other agreed documents can be included in the order scope. Specify traceability, document type and any special testing before quotation.
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Define the dimensions, media, joints and inspection records before confirming the order.
