Wedge Wire Slot Tube for Solid and Liquid Separation

A series of V-shaped wires (or wedge wires) are precisely arranged in parallel and circumferentially welded onto internal support rods. This construction creates a smooth, cylindrical screen surface with continuous slots running along its length.

The wedge wire slot tube is often referred to as a V-wire screen, continuous slot screen, or sometimes by the Johnson screen, standing out due to its unique construction and exceptional performance characteristics.

The wedge wire tube is ideal for solid and liquid separation in water treatment, food processing, and petrochemical refining.

Key Features of Wedge Wire Slot Tubes

• V-Shaped Profile Wire: The V shape faces inward, creating a narrow slot on the outer surface and a widening passage towards the inside.

• Support Rods: These provide structural integrity and maintain the precise gap between the V-wires.

• Continuous Slots: Unlike perforated plates or mesh screens, the slots are continuous and highly accurate, offering precise filtration control.

• Material: Typically manufactured from stainless steel 304, 316L, but also available in various alloys to suit specific chemical and temperature environments.

How Does Wedge Wire Solt Tube Achieve Superior Solid and Liquid Separation?

When a fluid carrying solids flows towards the wedge wire slot tube (either from outside-in or inside-out, depending on the application):

• Precise Filtration: The continuous, narrow external slot acts as the barrier. Particles larger than the slot opening are retained on the surface.

• Reduced Clogging: This is where the V-shape truly shines. As particles approach the slot, they typically only make two-point contact with the sharp edges of the V-wire. This minimizes the chance of particles getting wedged and blinding the screen. If a particle does pass the initial slot opening, the widening V-profile ensures it passes through freely without getting stuck within the slot itself. This results in a self-cleaning effect, especially with sufficient flow velocity or backwashing.

• High Open Area & Efficiency: The design allows for a significant open area compared to many other screen types, facilitating high flow rates with minimal pressure drop across the screen.

Applications of Wedge Wire Slot Tubes

• Water Treatment: Intake screens, ion exchange resin traps, filter nozzle underdrains.

• Food & Beverage: Pulp screening, juice extraction, mash filtration, and processing water filtration.

• Petrochemical & Refining: Catalyst retention, feed filtration, product straining.

• Mining & Mineral Processing: Dewatering screens, media retention, classification.

• Pulp & Paper: Fiber recovery, white water filtration.

• Wastewater Treatment: Sludge thickening, effluent screening.

• Chemical Processing: General filtration and straining applications.

Why Choose Wedge Wire Slot Tubes Over Other Filters?

Unlike perforated metal tubes or wire mesh filters, wedge wire filter elements provide:

Higher mechanical strength

Increased open area for better flow

More precise slot openings

Longer lifespan with minimal maintenance

Choosing the Right Wedge Wire Slot Tubes

When selecting a wedge wire slot tube, factors like the required slot opening (micron rating), flow rate, operating pressure and temperature, chemical compatibility (material selection), and physical dimensions must be considered. 

Consulting with experienced manufacturers or filtration specialists can ensure you get the optimal configuration for your specific solid and liquid separation challenge.

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Article Source: www.ubofilter.com