What Is a Wedge Wire Screen?

A wedge wire screen is a screening surface made from V-shaped (triangular) profile wire that is continuously welded to perpendicular support rods, creating a strong, non-clogging screen with precise slot openings used for dewatering, filtration, and coarse separation in vibratory screening and static applications. Also known as profile wire screen, Johnson screen, or DSM screen, wedge wire is one of the most durable screen media available for industrial separation processes.

The defining characteristic of wedge wire is the V-shaped cross-section of each surface wire. This profile creates a slot opening that is narrow at the screening surface and widens toward the support side. When a particle bridges the slot, it contacts only two narrow edges of the V-wire rather than settling into the opening. This means particles self-clean under vibration or fluid flow rather than plugging, making wedge wire inherently resistant to blinding and plugging.

Wedge Wire Screen Specifications

Why Wedge Wire Screens Matter in Vibratory Screening

Wedge wire screens serve applications that woven wire mesh cannot handle efficiently. Their importance in screening operations includes:

• Superior clog resistance — The V-profile slot geometry makes wedge wire virtually self-cleaning under vibration. Particles that bridge the slot are ejected by the vibratory motion rather than becoming trapped, which is a persistent problem with woven mesh in dewatering and wet screening applications.
• Extreme durability — Because every wire-rod intersection is welded, wedge wire screens are far stronger than woven mesh. They resist impact from heavy or sharp materials, withstand high-pressure flows, and last significantly longer in abrasive environments.
• Precision slot openings — The welded construction maintains exact slot widths across the entire screen surface, with tolerances tighter than most woven wire can achieve at equivalent opening sizes.
• High flow rates — For liquid-solid separation, the tapered slot allows liquid to pass through with minimal resistance once it clears the surface opening, delivering higher throughput than equivalent-opening woven screens.

Wedge wire screens are used on vibratory equipment from Sweco, Rotex, Midwestern Industries, and other manufacturers, as well as on static DSM screens, centrifuges, and custom filtration systems.

Related Glossary Terms

• Dewatering Screen — Equipment designed to remove liquid from solids
• Perforated Plate — Screen media made from punched metal sheet
• Woven Wire Cloth — Standard interlaced wire screen media
• Liquid-Solid Separation — Separating solids from liquid streams
• Blinding — Clogging of screen openings
• Plugging — Complete blockage of screen apertures

Wedge Wire Screen FAQs

What is wedge wire screen used for?

Wedge wire screen is used for dewatering, liquid-solid separation, coarse scalping, and filtration applications where clog resistance and structural strength are critical. Common applications include wastewater treatment, mining slurry dewatering, sugar processing, starch screening, pulp and paper filtration, and intake screens for water treatment plants.

What is the difference between wedge wire screen and woven wire mesh?

Wedge wire screen is welded construction using V-profile wire on support rods, while woven wire mesh is made by interlacing round wires in an over-under pattern. Wedge wire offers superior strength, longer life, and better clog resistance for coarse applications and dewatering. Woven wire mesh provides finer separation capability, higher open area at fine mesh sizes, and lower cost for standard screening applications.

Can wedge wire screens be used on vibratory separators?

Yes, wedge wire panels and sections can be installed on vibratory separators and linear vibratory screeners for dewatering and coarse separation. They are especially common on linear and rectangular vibratory screeners used in mining, wastewater, and food processing. Round vibratory separators more commonly use woven wire screens, but wedge wire inserts are sometimes used for specialized dewatering decks.