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Wedge wire screen manufacturing capabilities

SIMO Screens wedge wire screen manufacturing capabilities cover slot openings from 25 microns to 25 mm, diameters from 25 to 800 mm, cylinder lengths up to 6,000 mm and single flat panels up to 2,400 by 4,000 mm, in SS 304, SS 316L, Duplex 2205, Super Duplex 2507, Hastelloy and Monel, in flat, cylindrical, conical, curved and segmented forms.

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Wedge wire screen production line at the SIMO works, MIDC Butibori, Nagpur

Welded wedge wire screen range

Every SIMO screen is built from the same elements: a V-profile wire, a support rod and a resistance weld at every intersection. Purchase teams comparing screening manufacturers usually begin with slot range, size limits and alloys, which the table below summarises.

CapabilitySIMO Screens rangeApplication note
Slot openings25 microns (0.025 mm) to 25 mmFine media retention through to dewatering, sizing and drainage
Slot tolerancePlus or minus 5% of nominal, stated on the drawingMinimum, maximum and mean slot recorded at final inspection
Diameters25 to 800 mmNozzles and well points through to large baskets and cylinders
Cylinder and tube lengthsUp to 6,000 mmLong well screen and lateral sections with fewer joints
Flat panelsSingle panels up to 2,400 mm wide and 4,000 mm long; larger decks as joined panelsFalse bottoms, support grids and decks of any required size
FormsFlat, cylindrical, conical, curved, segmentedPanels, tubes, baskets, sieve bends and decks that pass a manway
Flow configurationsRadial external, outside to inside and inside to outside; radial internal, inside to outside; axial external, outside to insideSlot face placed on the side that carries the solids
Profile wiresLight, standard, heavy duty and custom; nine sizes, 12SB to 56SBOpen area balanced against strength and wear allowance
Support rodsNine sizes in profile, flat and round sections, Q23 to F253Span, stiffness and collapse resistance
MaterialsSS 304, SS 316L, Duplex 2205, Super Duplex 2507, Hastelloy, MonelFresh water through seawater and strong acids
ConstructionResistance welded at every wire and rod intersection; resists thermal cycling and pressure transients up to 300 PSISlot geometry fixed; screen acts as one structure
Design supportCFD for pressure drop, FEA for structural validationFlow and load verified before manufacture
FabricationFrames, flanges, end rings, housings, rolled and curved sections, brackets, segmented decksFinished assembly, ready to install
AccessoriesFlat panel frames and supports, header lateral fittings, candle filter fittingsScreen and fittings from one supplier
Quality and documentsISO 9001:2015; Mill Test Certificate with every product; other documents on requestMaterial and dimensions verifiable on receipt
StandardsWater well screens to IS 8110:2019Recognised basis for well screen tenders
SupplyMade in India for the world, from MIDC Butibori, NagpurDirect from the manufacturing works

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How a wedge wire screen is built: V-profile wire resistance welded to support rods

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How a wedge wire screen is built: V-profile wire resistance welded to support rods

Profile wire

Profile wire forms the screening surface. It is formed in house to SIMO profile codes, which fix shape, head width and height, and dimensions are checked with calibrated micrometers before welding. Wire width sets the open area at a given slot, while height sets stiffness and wear allowance.

SIMO profile wire shapes 12SB to 56SB, with width and height in mm

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SIMO profile wire shapes 12SB to 56SB, with width and height in mm
Profile wire no.Width (mm)Height (mm)
12SB12
15SB1.522.7
18SB1.83
28SB2.24.5
35SB35
35SSB2.65.5
42SB3.36.4
55SB55
56SB56.5

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Open area follows from slot and wire width:

Open area (%) = Slot x 100 / (Slot + Wire width)

A 0.5 mm slot on a 15SB wire, 1.52 mm wide, gives about 24.8 percent open area. Other combinations can be checked in the open area calculator.

Support rods

Support rods carry the load across the span and determine the screen's resistance to collapse and bending.

SIMO support rod shapes Q23 to round 140, with width and height in mm

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SIMO support rod shapes Q23 to round 140, with width and height in mm
Support rod no.SectionSize (mm, width x height)
Q23Profile2 x 3
Q35Profile3 x 5
Q55Profile4 x 7
35SBProfile3 x 5
F123Flat3 x 12
F203Flat3 x 20
F253Flat3 x 25
120RoundDia 3.15
140RoundDia 3.6

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Tall flat rods such as F203 and F253 suit long unsupported spans in support grids and false bottoms, while profile and round rods suit cylinders and fine screens. Selection is covered in the profile wire selection guide.

Materials

MaterialTypical service
SS 304Fresh water, wells, general process water, architectural work
SS 316LFood, brewing, moderate chlorides, general chemical service
Duplex 2205Higher chlorides and higher strength, brackish water, pulp and paper
Super Duplex 2507Seawater and severe chloride service
Hastelloy (C-276 standard)Strong acids and aggressive chemical service
MonelSeawater, brine and selected acid and alkali service

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Resistance to chloride pitting is commonly compared using PREN = %Cr + 3.3 x %Mo + 16 x %N, a higher value indicating better resistance. Hastelloy grades other than C-276 are supplied on request, subject to availability in India. The material selection guide sets out the basis for each grade.

Forms

  • Flat: panels, decks, false bottoms and support grids, usually cut from a welded cylinder and flattened
  • Cylindrical: screen tubes, well screens, baskets, candle elements and laterals; inside-to-outside drums by reverse rolling or winding on internal-profile machines
  • Conical: centrifuge baskets and tapered elements
  • Curved: sieve bends and arc screens to a set radius
  • Segmented: large panels and baskets divided to pass a manway and assembled in place

Fabrication on wedge wire

Frames, flanges, end rings, housings, rolled and curved sections, brackets and segmented decks are fabricated on the screen, so that the assembly is supplied ready to install. Details are on the fabrication page.

Inspection and documents

Every product passes dimensional inspection and is supplied with a Mill Test Certificate under our ISO 9001:2015 system. Dimensional inspection reports, quality assurance plans and other documents are supplied on request, as described on the quality page.

Custom engineering

Engineered to your specification, drawing or sample

Share the process conditions, a drawing or a photo of the screen to be replaced. Our engineers check slot, open area and strength with CFD and FEA where it matters, send a drawing for your approval, then build and dispatch with a Mill Test Certificate.

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Six steps from enquiry to dispatch: send details, engineering review, CFD and FEA, drawing approval, manufacture, dispatch with Mill Test Certificate

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  1. Share the requirement, a drawing or a photo of the existing screen.
  2. Engineering review of slot, open area, profile wire and support rod.
  3. CFD and FEA where the design calls for them.
  4. Drawing approval by you before anything is cut.
  5. Manufacture at our works in Nagpur.
  6. Dispatch with a Mill Test Certificate.

Questions

Common questions

What slot sizes can a welded wedge wire screen have?

SIMO Screens makes slot openings from 25 microns (0.025 mm) to 25 mm, with a standard tolerance of plus or minus 5 percent of nominal. Fine slots suit media retention and polishing; coarse slots suit dewatering, sizing and drainage.

What is the largest screen you can make?

Cylinders and tubes from 25 to 800 mm diameter in lengths up to 6,000 mm, and single flat panels up to 2,400 mm wide and 4,000 mm long. Larger decks are engineered as joined or segmented panels.

Which profile wire should I choose?

The wire is selected for load and wear first, then checked for open area, since a wider wire carries more load but gives less open area at the same slot. SIMO engineering recommends the profile and support rod for each application.

Can you make screens in Duplex, Super Duplex or Hastelloy?

Yes. We work in SS 304, SS 316L, Duplex 2205, Super Duplex 2507, Hastelloy and Monel. Hastelloy C-276 is the standard grade, and other grades are supplied on request, subject to availability in India.

Do you make custom profile wire or support rod sizes?

Yes. Custom profile and rod sizes are made subject to order quantity and frequency. Standard sizes are formed and stocked to SIMO profile codes.

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What you need
Medium, flow, temperature, pressure, or what goes wrong with the current screen.
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