wedge wire screen products

I. Core Product Understanding Wedge wire screen, also known as Johnson screen, is a high-precision screening and filtering element made of wedge-shaped screen wires and supporting ribs through resistance welding. Its core structure exhibits a "ladder-shaped welding" characteristic: the supporting ribs are relatively large in size and spacing (such as round bars with a diameter of 2.5-5mm), bearing the structural load; the wedge-shaped screen wires are small in size, forming the crucial slits for screening, and the slit width can be precisely controlled within the range of 0.005mm (5μm) to 10mm. 

II. Mainstream Product Classification and Specifications

(I) Classification by Structural Form

Flat Panels

Features: Fully welded rigid structure, screen wires and supporting ribs welded at 90° perpendicular angles, smooth surface

Specifications: Width 500-2000mm, Length 500-3000mm, slot tolerance ±0.025mm

Representative Applications: Vibrating screen panels, dewatering screens, mineral grading screens

Cylinders/Tubes

Features: Customizable screen wire arrangement on the outer surface, diameter range from 1/2 inch to 35 inches, length 1-5.85m

Connection Method: Welded or threaded male/female connectors

Representative Applications: Rotary screens, resin traps, well filter pipes, pipeline filters

Conical Baskets

Features: Rolled and welded from flat screen mesh, minimum inner diameter... 25mm diameter, supports both internal and external bidirectional filtration. Suitable for: centrifuges, coal slime dewatering machines, food-grade solid-liquid separation equipment. Special shapes available: Sieve Bends, Rotary Drums, Flow Reactor Scallops, etc. Customization: Irregular shapes can be manufactured according to drawings to fit special equipment cavities.

III. Core Product Features

Anti-clogging and High Flow Rate:The wedge-shaped sieve wires form a trapezoidal slit that is narrower at the top and wider at the bottom, reducing the number of contact points with solid particles. Combined with the smooth surface design, this significantly reduces the risk of clogging and provides excellent backwashing performance. The continuous slit structure increases the porosity by more than 30% compared to traditional metal mesh, reducing fluid resistance.

High Strength and Durability:Each sieve wire and support rib is reinforced by welding, resulting in high structural rigidity, strong load-bearing capacity, and a service life 5-10 times that of filter cloth. In some scenarios, it can achieve near-replacement-free operation.

Precision and Customization:Slit accuracy can reach ±0.025mm, with a minimum of 5μm (Fine Wedge® technology). Personalized design is supported: material selection, size specifications, porosity, and connection methods can all be customized as needed. Environmental adaptability: It can operate stably in environments ranging from -200℃ to 500℃, and is resistant to acids, alkalis, and salt spray corrosion, making it suitable for complex scenarios such as wastewater treatment, marine engineering, and high-temperature metallurgy. IV. Key Application Areas

(I) Industrial Separation and Filtration

Mining/Coal: Used for coal slime dewatering, mineral classification, and tailings dry discharge. For example, centrifugal screen baskets can reduce the moisture content of coal to below 15%.

Water Treatment: Tap water intake screening, wastewater solid-liquid separation, pre-membrane pretreatment; uniform opening ensures stable water flow velocity.

Chemical Industry: Catalyst recovery, resin retention, reaction liquid filtration; special alloy materials are suitable for highly corrosive systems.

(II) Food and Pharmaceutical

Malt filtration in beer brewing, wine clarification, and edible oil refining; 316L material meets FDA food contact standards.

Precision filtration of pharmaceutical intermediates; 5μm-level slits can trap fine impurity particles.

(III) Special Applications

Architectural Decoration: Anti-slip gratings, landscape drainage covers, combining functionality and design aesthetics.

Energy Industry: Sand control screens for oil and gas extraction, geothermal well filter pipes, resistant to high temperature and high pressure environments.