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Wedge Wire Screen
- Wedge Wire Screen
Wedge Wire Screen
Stainless steel wedge wire screen, also known as a stainless steel wedge wire filter, V-wire screen, or Johnson screen, is a high-performance, precision filtering and screening element. Its core advantage lies in the unique profile wire and "V"-shaped slot design, making it an irreplaceable choice in numerous demanding industrial filtration scenarios. It is an ideal filter element for achieving efficient, stable, and long-term operation.
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wedge mesh structure diagram
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Filtering direction
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Filtering direction
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Wedge wire mesh production
Key Features
Due to its special structure, stainless steel wedge wire screens possess a range of outstanding properties:
High Strength & Stability: The support rods provide robust mechanical support, enabling the screen to withstand high pressure, heavy loads, and strong vibrations without deformation.
High Precision & Uniform Slots: The gap between the profile wires (i.e., the filtration rating) can be made very precise and consistent, typically ranging from 25 microns to 3 millimeters. This ensures accurate and consistent filtration performance.
Excellent Anti-Blocking & Self-Cleaning Ability: The “V”-shaped slot design is its core advantage. The slot is narrower at the inside (screen surface) and wider at the outside, resembling a trumpet mouth. This structure prevents particles from easily lodging and clogging. Even if partial blockage occurs, it can be more easily removed through backwashing, offering far superior anti-clogging performance compared to standard woven wire mesh.
High Flow Rate & Low Pressure Drop: The continuous “V”-shaped channels create smooth flow paths, offering a large effective filtration area with low fluid resistance. This results in high flow capacity and low pressure loss.
Corrosion, Wear & High-Temperature Resistance: Made from high-quality stainless steels like 304, 316, or 316L, these screens can withstand harsh acidic/alkaline environments, high-abrasion conditions, and elevated temperatures, ensuring a long service life.
Easy to Clean & Maintain: The smooth surface and non-clogging slots minimize residue build-up, and the screens are compatible with various cleaning methods (e.g., water jet, ultrasonic, chemical cleaning).
Primary Application Fields
Leveraging these features, stainless steel wedge wire screens are widely used in industrial sectors requiring precision filtration, screening, and separation:
Solid-Liquid Separation:
1.Mining & Metallurgy: Screening in mineral processing plants (e.g., dewatering, media recovery), tailings processing, filter elements.
2.Environmental & Water Treatment: Bar screens (coarse/fine) in wastewater treatment plants, drum filters, rotary drum filters, core filtering components in Membrane Bioreactor (MBR) systems, pre-treatment for seawater desalination.
3.Food & Beverage / Pharmaceutical: Filtration of juices, wines, syrups; process filters in pharmaceutical manufacturing.
Gas-Solid Separation:
1.Petrochemical: Filtration and separation of natural gas, petroleum gas, and catalysts.
2.Power & Energy: Demister pads in Flue Gas Desulfurization (FGD) systems in power plants.
Other Notable Applications:
1.Pulp & Paper Industry: Washing, screening, and dewatering of pulp.
2.Machinery: Used as high-strength screen panels, such as for vibrating screens, centrifuge baskets, etc.
Structure
The structure of a stainless steel wedge wire screen is unique and robust, primarily consisting of two components:
Profile Wire (Wedge Wire): This gives the screen its name. The wire has a trapezoidal cross-section (a “V” shape that is wider at the top and narrower at the bottom). These wires are arranged parallel to each other with precise, uniform spacing.
Support Rods: These are sturdy circular or flat support bars that run perpendicular to the profile wires. The apex of each profile wire is welded onto these support rods.
Manufacturing Process: Through precise resistance welding, the apex of each profile wire is firmly welded to the support rods, forming an integral, one-piece structure. The resulting screen features a smooth surface with uniform slots and continuous “V”-shaped filtration channels inside.
Optional Shape
Flowing Direction
The direction of the filtering flow is determined by the position of the surface profiles in relation to the support rods. Wedge Wire Screen tubes are either flow out to in (FOTI) or flow in to out (FITO).
Surface Profiles
| Surface Profile |
Dimensions | Sketch | |
| A | B | ||
| 6SB | 0.50 mm | 1.20 mm |  |
| 8SB | 0.60 mm | 1.20 mm | |
| 10SB | 0.75 mm | 1.50 mm | |
| 11SB | 0.75 mm | 1.80 mm | |
| 12SB | 1.00 mm | 2.00 mm | |
| 1.20 mm | 2.30 mm | ||
| 18SB | 1.50 mm | 2.50 mm | |
| 20SB | 1.50 mm | 4.00 mm | |
| 22SB | 1.80 mm | 3.70 mm | |
| 2.00 mm | 3.00 mm | ||
| 2.20 mm | 3.50 mm | ||
| 28SB | 2.20 mm | 4.50 mm | |
| 34SB | 2.80 mm | 5.00 mm | |
| 3.00 mm | 4.50 mm | ||
| 3.00 mm | 5.00 mm | ||
| 3.00 mm | 6.50 mm | ||
| 42SB | 3.40 mm | 6.50 mm | |
| 50SB | 3.40 mm | 7.50 mm | |
Support Profiles
| Support Profile |
Dimensions | Sketch | |
| A | B | ||
| Q25 | 2.00 mm | 3.00 mm |  |
| Q35 | 3.00 mm | 5.00 mm | |
| Q55 | 4.00 mm | 8.00 mm | |
| 4.20 mm | 6.50 mm | ||
| D45 | 3.80 mm | 5.30 mm |  |
| D56 | 5.00 mm | 6.50 mm | |
| 10×3 | 3.00 mm | 10.00 mm |  |
| 12×3 | 3.00 mm | 12.00 mm | |
| 15×3 | 3.00 mm | 15.00 mm | |
| 25×3 | 3.00 mm | 25.00 mm | |
| 50×3 | 3.00 mm | 50.00 mm | |
| #5 | 5.0mm |  |
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| #6 | 6.0mm | ||
| #7 | 7.0mm | ||
| #8 | 8.0mm | ||
Most Commonly Used, Other Sizes Can Be Customized According To Special Requirements.
Material
| AISI ASTM |
DIN | BS | Branding | Structure |
| 304 | 1.4301 | 304 S15 | Austenite | |
| 304L | 1.4307 | 304 S12 | ||
| 202 | 1.4373 | |||
| 316 | 1.4401 | 316 S16 | ||
| 316L | 1.4404 | 316 S12 | ||
| 317LN | 1.4439 | |||
| 904L | 1.4539 | S31254 | SMO904 | |
| 321 | 1.4541 | 321 S12 | ||
| 316Ti | 1.4571 | 320 S31 | ||
| 329 LN | 1.4462 | S32205 | SAF2205 | Duplex |
| 439 | 1.4410 | S32750 | SAF2507 | |
| 2.4360 | Monel 400 | Others | ||
| 2.4610 | Hastelloy C4 | |||
| 2.4819 | HastelloyC276 | |||
| 2.4816 | Inconel 600 | |||
| 430 | 1.4016 | Ferrite |
OUR PRODUCTS
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Starch Screen
The Wedge Wire Starch Curved Screen is a curved screening device specifically designed for the starch industry. It features an arc-shaped screen surface made of precisely welded V-profile stainless steel wires, utilizing centrifugal force or gravity to achieve rapid dewatering and classification of starch slurry. Its curved structure prolongs slurry retention time, improving solid-liquid separation efficiency. It is suitable for starch extraction, refining, and byproduct recovery processes for starches such as potato, corn, and cassava. Characterized by efficient screening, wear and clogging resistance, and easy maintenance, this equipment is a key solid-liquid separation device in modern starch processing.
Rotary Drum
The Stainless Steel Wedge Wire Rotary Drum Screen (also known as a Rotary Drum Strainer or Micro-Screen) is a continuously and automatically operating front-end solid-liquid separation device. Its core component is a large cylindrical drum installed horizontally or at a slight incline. The entire circumferential surface of the drum is covered with a stainless steel wedge wire screen (Johnson screen). The wastewater to be treated flows into one end of the drum. Under gravity, the filtrate passes through the wedge wire slots, while solid suspended matter (such as fibers, hair, plastic pieces, and fine particles) is retained on the inner surface of the drum. As the drum rotates slowly, the retained debris is lifted to the top, where it is flushed by spray water into a collection trough, achieving a continuous process of automatic screening, filtration, and residue removal
Screen Basket for Screw Press Separator
The stainless steel wedge wire screen basket, commonly known as the "V-wire screen," "press screen basket," or "screen cylinder," is a core component of screw press solid-liquid separators. It is installed inside the spiral press, enclosing the rotating screw shaft. The working principle is as follows: raw slurry with high moisture content is pushed into the screen basket by the screw shaft. Under the squeezing and conveying action of the spiral flights, the liquid (filtrate) is forced out through the precise, continuous slots of the screen basket, while the solid material (manure cake) is retained inside and continues to be compressed and dewatered as it moves forward. Finally, the dewatered solids are discharged from the outlet, achieving solid-liquid separation.
Wedge Wire Vibrating Screen
A stainless steel wedge wire vibrating screen is a solid-liquid separation device featuring a screen surface made by precisely welding V-shaped stainless steel wires, integrated with a high-frequency vibration system. With uniform slots, wear resistance, and corrosion resistance, it is suitable for wet screening and dewatering operations. The vibration mechanism enables rapid material dispersion and efficient sieving while effectively preventing screen clogging. Widely used in industries such as mining, metallurgy, food processing, and environmental protection, it is particularly suitable for handling fine particles, high-viscosity, or easily agglomerated materials, offering advantages such as high screening accuracy, large processing capacity, and long service life.
Wedge Wire Water Well Screen
Johnson Deep Water Well Screens, also referred to as continuous slot screens or wire wrap screens, were originally developed to solve sand control challenges in fine-grained and uniform sand formations. These geological conditions are commonly encountered in deep groundwater aquifers, where conventional perforated pipes often suffer from clogging, excessive sand production, and reduced well efficiency.
Sintered Mesh Plate and Disc
Sintered Mesh Plates and Discs are high-precision filtration components fabricated by bonding multiple layers of stainless steel wire mesh through a specialized vacuum sintering process. Unlike traditional mesh that relies on mechanical weaving alone, these plates are fused at every contact point, transforming individual wires into a rigid, integrated porous metal sheet.
These plates can be customized into various shapes, most commonly circular discs, to fit specific industrial equipment. They offer an ideal balance of high permeability, extreme structural integrity, and precise filtration ratings. Because they are made entirely of metal (typically 304 or 316L), they provide a "permanent" filtration solution that can withstand high temperatures and corrosive chemicals while remaining fully cleanable and reusable.
OUR LATEST
Our Latest Blog & News
Why Custom Engineering Capability Defines a Reliable Johnson Wedge Wire Screen Supplier
Discover how custom engineering and slot precision in a johnson wedge wire screen optimize filtration efficiency and ensure long-term industrial system reliability.
Why Stainless Steel Wedge Wire Screen is the Superior Choice for Industrial Filtration
Explore why a stainless steel wedge wire screen boosts efficiency, minimizes clogging, and lowers long-term operational costs in demanding industrial filtration systems.
Why Water Bore Screens Are Essential for Preventing Sand Infiltration
Properly engineered water bore screens prevent sand infiltration and equipment damage, ensuring high water clarity and long-term structural stability for groundwater well investments.
Johnson Screen Tubes in Water Well Projects: Practical Experience from the Field
Johnson Screen Tubes, also known as continuous slot wire-wrapped screens, are widely used in groundwater and water well projects where sand control and long-term flow stability are critical. While the basic structure of these screens is well known, their actual performance in the field is often determined by how well they are selected, manufactured, and installed.
This article shares practical observations from water well projects where Johnson Screen Tubes have been applied in real operating conditions.
Why Screen Selection Matters in Deep and Medium-Depth Wells
In many groundwater projects, especially wells deeper than 30 meters, the surrounding formation is often composed of fine to medium sand with relatively uniform particle distribution. In such conditions, improper screen selection can lead to sand production, pump damage, and declining water output.
Johnson Screen Tubes are designed with continuous V-shaped wire slots that widen inward. This structure allows fine particles to bridge at the outer surface while maintaining open flow paths inside the screen. Compared with perforated pipes or slotted casings, continuous slot screens provide a more uniform opening and higher effective open area, which helps reduce entrance velocity and head loss.
Field experience shows that when slot size is matched correctly to formation grain size, well development time is reduced and sand pumping issues are minimized.
Manufacturing Quality and Its Impact on Performance
Although Johnson Screen Tubes follow a standard design concept, manufacturing quality plays a major role in their service life. Each V-shaped wire is resistance welded to longitudinal support rods, forming a rigid and stable structure.
In practice, inconsistencies in slot width, weak welds, or poor material quality can cause early failure, especially in deep wells where collapse strength is critical. Stainless steel grades such as SS304 and SS316 are commonly used to improve corrosion resistance in groundwater environments with varying chemical compositions.
From field feedback, screens with consistent slot spacing and well-controlled welding quality show better resistance to deformation during installation and maintain stable performance over long operating periods.
Installation and Well Development Considerations
Proper installation is as important as the screen itself. During lowering of the screen into the borehole, alignment and handling must be controlled to avoid mechanical damage. After installation, well development is carried out to remove fine particles from the formation around the screen.
Continuous slot screens respond well to development methods such as air lifting and surging, allowing fines to be removed efficiently without damaging the screen structure. Wells developed correctly tend to achieve higher yield and show more stable water quality during operation.
Typical Applications and Operating Conditions
Johnson Screen Tubes are commonly used in:
Municipal and rural water supply wells
Agricultural irrigation wells
Industrial groundwater extraction
Environmental monitoring wells
Dewatering and remediation projects
In these applications, screen durability and flow efficiency are key factors affecting long-term operating costs.
Long-Term Performance in Service
Well operators often focus on initial flow rate, but long-term stability is equally important. Projects using properly selected Johnson Screen Tubes typically report lower maintenance requirements and fewer sand-related issues over time.
In many cases, wells equipped with continuous slot screens remain in service for decades with minimal intervention, provided that material selection and installation practices are appropriate.
Final Thoughts
Johnson Screen Tubes are not a one-size-fits-all solution. Their real value comes from correct engineering selection, consistent manufacturing quality, and proper installation. When these factors are aligned, continuous slot screens offer reliable sand control, efficient water production, and long service life in demanding groundwater applications.
