SCREEN SPECIFICATION GUIDE
Wedge Wire Screen Specification Guide
A complete wedge wire screen specification should define the screen form, overall and active dimensions, clear slot opening, profile wire, support arrangement, material grade, flow direction, mounting interface, tolerances and inspection requirements. OEM and replacement enquiries should also include the drawing revision, operating duty, quantity and delivery destination.
1. Begin with the separation duty
Describe what the screen must retain or pass, the process medium and how the equipment operates. Include flow with units, temperature and any relevant solids, abrasion or cleaning conditions. A request for a “fine screen” leaves too much open: the intended separation and operating limits are more useful.
2. Define the geometry and interfaces
Choose the screen form and distinguish overall dimensions from active screening dimensions. On panels, show the frame and usable area. On cylinders, show diameter, active length and end fittings. On curved screens, identify radius and arc. For a basket or false bottom, include taper, segment joints, supports and access openings.
Mark the datum used for each critical dimension. Include mating holes, flange faces, sealing areas and assembly clearances. The connection to the equipment often decides whether a replacement fits.
3. Specify slot, profile and flow together
State the clear slot opening in millimetres and identify the working face and flow direction. Include the tolerance required for acceptance. If a wire profile or support arrangement is mandatory, put it on the drawing; otherwise ask for it to be reviewed against the duty.
Slot opening is not the same as wire pitch, a universal particle cut size or flow capacity. Read the slot and open-area explanation before comparing screen quotations solely by slot size.
4. Identify material and documentation requirements
State the specified alloy rather than only “stainless steel.” Include exposure, cleaning chemicals and temperature where they influence selection. If material records, a particular surface condition or a project standard are required, name the document and scope in the enquiry.
Do not assume that a generic material name also confirms a finished component’s load rating, hygienic acceptance or environmental compliance. Those requirements belong in the order specification.
5. Make the acceptance criteria quotable
| Specification item | Information to provide |
|---|---|
| Screen form | Panel, cylinder, sieve bend, basket, intake screen, false bottom or drawing-defined assembly. |
| Drawing | Drawing number, revision and units; identify which document takes precedence. |
| Dimensions | Overall envelope, active screening area, critical dimensions, datum and required tolerances. |
| Slot and profile | Nominal clear slot, permitted variation, profile wire and support arrangement where specified. |
| Flow and duty | Working face, flow direction, medium, temperature, pressure or load, abrasion and cleaning conditions. |
| Material | Required alloy grade, component scope, surface condition and material-document requirements. |
| Fit and connections | Mating faces, flanges, frames, fixing holes, sealing areas, assembly clearances and operating loads. |
| Inspection | Slot sampling, measurement locations, dimensional checks, requested records and acceptance criteria. |
| Order and logistics | Quantity, packing constraints, delivery destination, requested timing and applicable trade terms. |
6. Request a clear quotation
Ask the quotation to identify the proposed screen construction, material, tolerances, inspection scope, quantity, packing, lead time and delivery terms. Resolve differences between the enquiry and the proposal before placing the order.
Use the downloadable screen RFQ checklist to organize the request. You can leave unknown fields open for discussion; avoid filling them with guesses.
Further engineering context
Hendrick’s wedge wire engineering overview describes profile-wire construction and screen forms. It is an independent manufacturer reference, not a specification or capability declaration for Wedge Wire Works.