Wedge Wire Lateral Assemblies
Wedge Wire Lateral Assemblies | Screen Laterals | Hub and Header Lateral Assembly
Wedge Wire Lateral Assemblies are critical internal components used in pressure and gravity filtration systems, particularly in sand filters, multimedia filters, ion exchange vessels, and water treatment tanks. Installed at the bottom or side of filter vessels, lateral assemblies are designed to evenly collect filtered water or uniformly distribute backwash flow, ensuring stable system performance and preventing media loss.
Manufactured from precision profile wire (wedge wire) welded to support rods, wedge wire lateral assemblies feature continuous slot openings that provide accurate filtration, high open area, and excellent mechanical strength. Compared with perforated pipe or slotted pipe laterals, wedge wire laterals offer superior flow efficiency, longer service life, and reduced clogging risk.
These assemblies are widely used in water treatment plants, desalination systems, industrial process filtration, power generation, and chemical processing, where reliability and hydraulic performance are essential.
Advantages of Wedge Wire Lateral Assemblies
- Uniform Flow Distribution
Continuous V-shaped slot openings ensure even collection and backwash distribution, preventing dead zones and media fluidization issues. - High Mechanical Strength
Fully welded construction provides excellent resistance to pressure, vibration, and thermal stress. - Anti-Clogging Design
The wedge wire profile creates a self-cleaning effect, reducing particle lodging and extending operating cycles. - Accurate Slot Control
Slot sizes can be precisely controlled, preventing filter media loss while maintaining high flow capacity. - High Open Area
Compared with perforated pipe laterals, wedge wire laterals offer significantly higher open area, reducing pressure drop and energy consumption. - Long Service Life
Manufactured from corrosion-resistant metals, wedge wire lateral assemblies perform reliably in aggressive chemical and high-temperature environments.
Specification of Wedge Wire Lateral Assemblies
Single Wedge Wire Laterals Specifications
Single wedge wire laterals are individual lateral elements installed directly into a header, hub, or distributor plate. This flexible design allows for customized layouts and is particularly suitable for retrofit projects or systems requiring selective replacement of laterals. With precise slot control and a robust welded structure, single wedge wire laterals provide reliable filtration performance while simplifying installation and maintenance.
| Common Used Single Wedge Wire Laterals Specifications | |||
| Screen Diameter | Screen Slots | Reinforced Perforated Pipe | Joint type |
| 30 mm | 0.2 /0.3 / 0.5 / 1 mm | 1/2″ Sch40, DN15 × 2.5 | thread pipe joints 1/2″, G15 |
| 38 mm | 0.2 /0.3 / 0.5 / 1 mm | 3/4″ Sch40, DN20 × 3 | thread pipe joints 3/4″, G20, |
| 45 mm | 0.2 /0.3 / 0.5 / 1 mm | 1″ Sch40, DN25 × 3.5 | thread pipe joints 3/4″, 1″, G20, G25 |
| 50 mm | 0.2 /0.3 / 0.5 / 1 mm | 1-1/4″ Sch40, DN32 × 3.5 | thread pipe joints 3/4″, 1″, G20, G25 |
| 57 mm | 0.2 /0.3 / 0.5 / 1 mm | 1-1/2″ Sch40, DN40 × 4 | thread pipe joints 1″, 1-1/4″, 1-1/2″, G25, G32, G40 |
| 76 mm | 0.2 /0.3 / 0.5 / 1 mm | 2″ Sch40, DN50 × 4 | flange 2″, DN50 |
| 105 mm | 0.2 /0.3 / 0.5 / 1 mm | 3″ Sch40, DN80 × 5.5 | flange 3″, DN80 |
| 130 mm | 0.2 /0.3 / 0.5 / 1 mm | 4″ Sch40, DN100 × 6 | flange 4″, DN100 |
Notes:
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Hub and Header Lateral Assembly
Hub & Spoke Lateral Assembly
The hub & spoke lateral assembly features multiple wedge wire laterals radiating from a central hub, forming a compact and hydraulically balanced underdrain system. Commonly used in circular pressure vessels, this design delivers uniform flow distribution during both filtration and backwashing while optimizing space utilization. The hub & spoke configuration is especially effective for medium to large filter vessels where consistent performance and structural stability are critical.
Header & Lateral Assembly
The header & lateral assembly consists of a central header pipe connected to multiple wedge wire laterals arranged across the vessel floor. This configuration is widely used in large sand filters and multimedia filtration systems, as it ensures uniform collection and backwash distribution over the entire filter area. The high open area of the wedge wire laterals minimizes pressure drop while maintaining excellent media retention, making this assembly ideal for high-flow and heavy-duty water treatment applications.
Header & Lateral Assembly
The header & lateral assembly consists of a central header pipe connected to multiple wedge wire laterals arranged across the vessel floor. This configuration is widely used in large sand filters and multimedia filtration systems, as it ensures uniform collection and backwash distribution over the entire filter area. The high open area of the wedge wire laterals minimizes pressure drop while maintaining excellent media retention, making this assembly ideal for high-flow and heavy-duty water treatment applications.
| Common Used Hub Fish Spike or Header Lateral Assembly Specifications | ||||
| Tank Diameter | Hub Pipe and Flange | Laterals Screen Diameter | Laterals Screen Length | Numbers of Laterals |
| (Range from side to middle) | ||||
| 48″ / 1219 mm | 3″ / DN80 | 32 mm, 38 mm, 45 mm | 250 mm – 500 mm | 10–12 |
| 54″ / 1350 mm | 4″ / DN100 | 38 mm, 45 mm, 57 mm | 280 mm – 550 mm | 10–16 |
| 60″ / 1524 mm | 4″ / DN100 | 45 mm, 57 mm, 76 mm | 330 mm – 650 mm | 12–16 |
| 72″ / 1828mm | 5″ / DN125 | 45 mm, 57 mm, 76 mm | 400 mm – 800 mm | 12–16 |
| 80″ / 2032 mm | 6″ / DN150 | 57 mm, 76 mm, 89 mm | 450 mm – 900 mm | 12–16 |
| 120″ / 3048 mm | 8″ / DN200 | 57 mm, 76 mm, 89 mm | 700 mm– 1400 mm | 16–24 |
| 126″ / 3200 mm | 8″ / DN200 | 57 mm, 89 mm, 108 mm | 700 mm – 1450 mm | 20–24 |
| 150″ / 3810 mm | 8″ / DN200 | 57 mm, 89 mm, 108 mm | 700 mm – 1850 mm | 20–26 |
| Notes: Special specifications are processed and produced according to the user’s requirements. We offer perforated pipes interiors the wedge wire screen tube that can withstand high pressure. Material grade 304, 304L, 321, 316L, 310S, 904L, C276, S32205, S32750, Titanium Gr.2 | ||||
Custom Engineered Lateral Assemblies
Custom Engineered Wedge Wire Lateral Assemblies are designed according to specific vessel dimensions, flow rates, operating pressure, and filter media characteristics. Slot size, lateral length, diameter, material grade, and end connections can be precisely tailored to optimize filtration efficiency and prevent media loss. These assemblies are ideal for specialized filtration systems and high-performance industrial applications requiring exact hydraulic and mechanical specifications.
Available Materials
- Stainless Steel 304 / 304L
- Stainless Steel 316 / 316L
- Duplex Stainless Steel
- Carbon Steel (with coating if required)
- Special alloys upon request
Slot Size
- Typical range: 0.05 mm – 1.0 mm
- Customized according to filter media size
Wedge Wire Profile
- V-shaped profile wire
- Smooth surface facing the media side
Support Rod Type
- Round or triangular rods
- Fully resistance welded
Lateral Diameter
- Common OD: 20 mm – 80 mm
- Custom diameters available
Length
- Standard and custom lengths based on vessel design
End Connections
- Threaded (NPT / BSP)
- Flanged
- Welded ends
- Quick-connect designs
Operating Conditions
- High pressure resistance
- Suitable for continuous operation and frequent backwashing
Applications of Wedge Wire Lateral Assemblies
Wedge wire lateral assemblies are widely used in:
- Water Treatment Plants
Sand filters, multimedia filters, activated carbon filters - Ion Exchange Systems
Resin retention and uniform backwash distribution - Desalination & Seawater Treatment
Pretreatment filtration units - Power Generation
Boiler feed water and cooling water filtration - Chemical & Petrochemical Industry
Process water and product filtration - Food & Beverage Industry
Process water treatment and polishing filtration - Mining & Metallurgy
Process water clarification and tailings filtration
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