A wedge wire filter screen, also known as a Johnson screen or a V-wire screen, is a type of filtration device used in
various industrial and environmental applications. It often been named as water filter mesh or dewatering screens
or wire mesh processing products.
Construction
- Material: Typically made from stainless steel, but can also be constructed from other materials like carbon steel,
Hastelloy, or duplex stainless steel depending on the application.
- Wedge Wires: These are profiled wires that have a triangular (V-shaped) cross-section. The wires are precision-wired
together to form a continuous slot.
- Support Rods: The wedge wires are welded to support rods, which provide structural integrity and maintain the
shape of the screen.
Features
- Continuous Slots: The V-shaped wires create narrow, parallel slots that allow for uniform filtration. The size of these
slots can be customized to meet specific filtration requirements.
- High Open Area: The design allows for a high percentage of open area, which reduces clogging and increases flow rates.
- Durability: The robust construction and use of corrosion-resistant materials make these screens highly durable and
suitable for harsh environments.
- Self-Cleaning: The smooth surface of the wedge wires helps prevent material build-up and makes the screen easier to clean.
Applications
- Water and Wastewater Treatment: Used in the filtration of water, removal of solids, and clarification processes.
- Oil and Gas Industry: Employed in well screens, downhole filters, and separators.
- Chemical and Petrochemical Industries: Used in reactors, distillation columns, and other process equipment.
- Food and Beverage Industry: Applied in the filtration of liquids, such as juice, beer, and wine, and in the separation
of solids from liquids.
- Mining and Mineral Processing: Used in dewatering, classification, and sizing of minerals.
- Environmental Applications: Utilized in groundwater remediation, stormwater management, and erosion control.
Benefits
- Uniform Filtration: The consistent slot size ensures uniform filtration, reducing the risk of bypass and ensuring
efficient separation.
- Low Maintenance: The self-cleaning nature of the design reduces maintenance requirements.
- Long Service Life: Durable construction and resistance to corrosion extend the service life of the screen.
- Customizable: Can be tailored to specific needs in terms of slot size, diameter, and length.
Installation and Maintenance
- Installation: Wedge wire screens can be installed in various configurations, including cylindrical, flat panels, or
custom shapes, depending on the application.
- Maintenance: Regular inspection and cleaning are recommended to ensure optimal performance. Cleaning methods
include backwashing, mechanical brushing, and chemical cleaning.