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Views: 0 Author: Site Editor Publish Time: 2026-08-06 Origin: Site
A reverse wedge wire screen is used when liquid must move from the center of a cylindrical filter toward the outside. This is different from many standard screen tubes, where fluid enters from the outer surface and flows inward.
In this article, the term Reverse Wedge Wire Screen refers to a welded cylindrical screen with axial profile wires on the inside and circumferential support wires on the outside. The inner wires form the filtering surface. The outer wires hold the cylinder together and help it resist pressure during operation.
This design is often used in compact industrial filters, process equipment, resin-retention systems, and other applications that need inside-to-outside flow. It is closely related to the Inverted Screen Pipe product family, which can be produced in different materials, slot sizes, diameters, and connection styles.
The two examples discussed here are made from SS316Ti. Both use a 0.6 mm slot, 1 × 2 mm profile wires, 1.8 × 2.5 mm support wires, an 85 mm length, and welded end rings. One screen has a diameter of 82 mm, while the other has a diameter of 52 mm.
The wire arrangement is the main feature that separates a reverse screen from a standard cylindrical wedge wire screen. Each wire has a clear job, and the screen will only perform well when the wires, welds, and end connections work together.
The profile wires run along the length of the screen. In the supplied design, they are placed on the inside of the cylinder.
The space between two nearby profile wires creates the continuous slot. The slot width in both examples is 0.6 mm. This opening controls which particles can pass through the screen and which particles stay on the inner surface.
Because the profile wires face the incoming fluid, they are the first part of the screen to contact solids. Their size, shape, spacing, and surface condition can affect flow, separation accuracy, and cleaning.
The supplied profile wire measures 1 × 2 mm. This wire size gives the working surface enough strength while still allowing a useful open area. The exact balance between strength and flow depends on the final number of wires and the total screen diameter.
A continuous slot also spreads the flow across the active surface. This is different from a plate with separate drilled holes, where the flow is limited to each round opening. The broader Wedge Wire Screen Pipe range includes similar continuous-slot structures for industrial liquid filtration.
The support wires run around the outside of the screen. They cross the internal axial wires and are welded at each contact point.
In these examples, the support wire measures 1.8 × 2.5 mm. It helps the screen resist radial force and prevents the profile wires from moving out of position.
This support structure is important because pressure acts on the inner surface during inside-to-outside filtration. As liquid moves outward, the screen must keep its round shape and maintain an even slot width.
The support wire must also handle normal installation loads, vibration, and cleaning pressure. If the spacing is too wide, the screen may lose strength. If the supports are too close together, they may reduce the available flow area.
Good welding is just as important as wire size. Uneven welding can change the slot width or pull the cylinder out of shape. Weak welds may also fail under repeated pressure changes. The manufacturer must control heat, alignment, weld strength, and final roundness during production.
The welded rings at both ends give the screen extra support. They also create a stable connection point for the housing or surrounding equipment.
The working principle is simple. Unfiltered liquid enters the center of the screen, passes through the slots, and leaves from the outside.
However, the final filtration result depends on more than the direction of flow.
During operation, liquid enters the open center of the reverse wedge wire screen. Pressure then pushes it toward the inner filtering surface.
Particles that cannot pass through the 0.6 mm slot remain inside the cylinder. The filtered liquid moves between the profile wires and exits around the outer surface.
This radial flow path can be useful when the feed pipe is connected to the center of a filter element. It can also suit equipment where the clean liquid must collect in the space around the screen.
The short 85 mm length of the supplied designs suggests that they are intended as compact filter components rather than long well screens. They may fit into small housings, process vessels, filter cartridges, or custom distribution systems.
The nominal slot size is 0.6 mm, but slot width alone does not fully describe screen performance.
Wedge wire creates a narrow opening at the filtering surface. The passage becomes wider after the fluid passes through the slot. This shape can reduce the chance of hard particles becoming trapped deep inside the opening.
Even so, the screen should not be described as completely clog-free. Sticky solids, fibers, grease, soft particles, and crystals may still cover or bridge the slot.
Particle shape also matters. A thin or flexible particle may pass through a 0.6 mm opening even when one of its other dimensions is larger. A soft particle may bend under pressure. For this reason, buyers should provide more than a general particle-size value when separation accuracy is important.
Useful process information includes the shape of the solids, their hardness, the solids concentration, the liquid thickness, and the expected flow rate.
As solids build up on the internal surface, they reduce the open area. The filter then needs more pressure to maintain the same flow.
A rising pressure difference across the screen is a common sign that cleaning may be needed. The operator may flush the screen, start a backwash cycle, reduce the flow, or remove the element for inspection.
The correct method depends on the material being filtered. Loose mineral particles may be removed with water. Scale may need chemical cleaning. Sticky deposits may need mechanical cleaning.
The cleaning pressure must stay within the screen’s structural limit. Too much pressure can bend the wires, damage welds, or change the slot opening.
Industrial buyers often focus first on slot size, but the complete design controls the real flow rate, strength, and service life.
The 0.6 mm slot controls the nominal separation opening. It does not show how much liquid the screen can process.
The total open area also depends on the diameter, active length, profile-wire width, number of slots, support-wire spacing, and area covered by the end rings.
The 82 mm screen has a larger circumference than the 52 mm version. If the wire spacing and active length remain similar, the larger model can provide more filtering surface. The exact open area should still be calculated from the approved drawing.
A stronger wire is not always better. A wider wire may improve strength, but it can also reduce open area. Closely spaced support wires may help the screen resist pressure, but they may restrict flow.
The final design must balance separation accuracy, hydraulic capacity, and mechanical strength.
The main details of the two supplied configurations are shown below.
Specification | Configuration A | Configuration B |
|---|---|---|
Material | SS316Ti | SS316Ti |
Diameter | 82 mm | 52 mm |
Slot size | 0.6 mm | 0.6 mm |
Profile wire | 1 × 2 mm | 1 × 2 mm |
Support wire | 1.8 × 2.5 mm | 1.8 × 2.5 mm |
Length | 85 mm | 85 mm |
End connection | Welded rings | Welded rings |
Ring size | OD 82 mm × H 10 mm | OD 52 mm × H 10 mm |
The common slot size and wire dimensions give both versions a similar filtering concept. Their different diameters allow them to fit different housings or equipment connections.
Both reverse wedge wire screens use SS316Ti. This alloy is often considered for welded parts and corrosive service, but no stainless steel grade is suitable for every process.
The buyer should confirm the operating temperature, chloride level, pH, cleaning chemicals, and any acids or solvents in the fluid. Abrasive solids should also be considered because corrosion resistance does not always mean strong wear resistance.
The manufacturing process can affect material performance as well. Welding, heat control, surface treatment, and final cleaning should be managed carefully. Xinlu’s production capabilities include forming, welding, grinding, polishing, and inspection for different wedge wire products.
The welded rings are not minor accessories. Their dimensions affect installation, alignment, and sealing.
The 82 mm screen uses rings with an outside diameter of 82 mm and a height of 10 mm. The 52 mm version uses matching 52 mm rings with the same height.
Before production, the buyer should explain how the rings will connect to the equipment. They may be welded into a housing, inserted into a machined seat, held by a clamp, or sealed with a gasket.
A screen can have the correct slot and material but still fail to fit if the ring diameter or length is wrong. The ring tolerance should therefore be checked together with the main screen dimensions.
A reverse wedge wire screen is most useful when the equipment needs inside-to-outside flow and a compact cylindrical filter element.
The short length and small diameters of the supplied screens make them suitable for compact filtration assemblies.
Possible uses include inline strainers, pump protection filters, vessel internals, small process cartridges, distribution pipes, and equipment protection screens.
A reverse screen may also be used where solids must stay inside the element for easier collection or inspection. The inner working surface can keep retained material away from the outer clean-liquid area.
A related Wedge Wire Filter Cartridge may be used in process water, chemical fluids, recycled water, and other solid-liquid separation systems. The final format depends on the housing, flow path, and connection method.
Chemical systems may use a reverse wedge wire screen to retain resin, catalyst, or other process media while allowing liquid to pass outward.
In these applications, the slot must be smaller than the media that must remain inside the equipment. The screen also needs enough open area to prevent high pressure loss.
Material compatibility is especially important. The alloy, welds, and surface finish must handle the actual chemicals and cleaning agents used in the process.
Reverse wedge wire screens can also be used in water and wastewater equipment. They may protect pumps, nozzles, or downstream treatment units from larger suspended solids.
Inside-to-outside flow can fit systems where untreated water enters through a central pipe. The filtered water then collects around the outside of the element.
The screen still needs regular cleaning when solids are sticky or when the feed contains a high amount of suspended material.
Wedge wire products are used across many industrial filtration applications, including food processing, mining, chemical production, petroleum, pulp and paper, and water treatment.
In food and beverage systems, the buyer should confirm surface finish, cleanability, weld condition, and hygiene requirements.
In mineral or slurry systems, wear may be more important than corrosion. The screen structure must handle abrasive particles, vibration, and heavy solids.
The reverse design can serve many industries, but the exact slot, wire size, alloy, and support spacing should always match the real operating conditions.
A complete specification helps the manufacturer produce a screen that fits the equipment and performs as expected.
The buyer should first confirm that the required flow direction is from the center toward the outside. The expected flow rate, normal pressure, maximum differential pressure, solids concentration, and cleaning method should also be clear.
Particle information is equally important. The manufacturer needs to know whether the solids are hard, soft, fibrous, sticky, or abrasive. A simple particle-size value may not be enough.
Before production, the final drawing should confirm the screen diameter, active length, slot tolerance, wire sizes and directions, ring dimensions, weld details, surface finish, material grade, and inspection method. A clear drawing helps prevent fit and performance problems.
It is also useful to show the flow direction directly on the drawing. This avoids confusion when the screen uses a reverse or inside-out wire layout.
For custom projects, Xinlu’s wedge wire screen service supports different materials, dimensions, slot sizes, and connection designs. Buyers can provide a drawing, sample, or operating information for review.
A Reverse Wedge Wire Screen gives industrial filtration systems a controlled inside-to-outside flow path. Its internal axial profile wires form the filtering surface, while the external circumferential supports keep the cylinder stable.
The two SS316Ti examples use the same 0.6 mm slot, wire dimensions, 85 mm length, and welded-ring design. The 82 mm and 52 mm diameters allow the same basic structure to fit different equipment sizes.
Good performance depends on the full design, not only the slot width. Flow rate, solids type, open area, pressure, material compatibility, cleaning method, weld quality, and housing dimensions must all be considered.
Anping County Xinlu Wire Mesh Products Co., Ltd. supplies custom wedge wire screens, screen tubes, filter cartridges, and related industrial filtration components. Project buyers can contact Xinlu with their required dimensions, process conditions, and technical drawings for further review.
