Chemical-process filtration components remove entrained solids, protect pumps and reactor internals, and support consistent filtrate quality. Effective design starts with fluid chemistry, solids loading, particle-size distribution, temperature, operating pressure, maximum differential pressure, and cleaning method.
Applications and Component Configurations
Process Locations and Contaminant Profiles
Chemical plants install filtration components at raw-material inlets, reactor-feed lines, catalyst-recovery systems, product-polishing stages, brine circuits, polymer lines, and wastewater units. Scale and transport debris often require coarse protection. Catalyst fines, gels, or suspended solids demand closer control of slot opening, filtration area, pressure drop, and cleaning frequency.
Component Forms and Flow Arrangements
Flat panels support static screening, curved screens assist dewatering, cylindrical screens and baskets fit pipelines or vessels, and nozzles retain media while distributing flow. We review the installation envelope, flow direction, connection geometry, solids behavior, and cleaning access before developing each custom component.
Wedge Wire Construction and Manufacturing Control
Slot Geometry and Hydraulic Function
A wedge wire screen combines V-shaped profile wire with support rods. The narrow surface opening controls particle retention, while the passage widens below the filtration surface. This geometry reduces particle lodging and supports backwashing when the process supplies adequate reverse-flow velocity.
Profile Forming and Screen Welding
Cold drawing improves wire consistency, annealing restores ductility, shaped rolling forms the specified cross-section, and fine drawing calibrates final dimensions and surface finish. During screen fabrication, resistance welding joins profile wire to support rods and controls slot opening, support pitch, and structural geometry.
Available Profiles and Screen Dimensions
Our profile-wire range covers 0.5 x 1.0 mm to 5.0 x 10.0 mm, with dimensional tolerance down to +/-0.01 mm for qualified profiles. Screen projects may use slots from 0.02 to 5 mm, widths from 25 to 1,200 mm, and lengths up to 6,000 mm. Material, component form, and structural load set the final limits.
Design Parameters and Technical Terminology
Slot Opening, Filtration Rating, and Mesh Count
Slot opening means the clear distance between adjacent profile wires at the filtration surface. Filtration rating describes particle-retention performance on a nominal or absolute basis. Mesh count applies mainly to woven wire mesh and cannot replace a slot specification for wedge wire products.
Required Process Data
A complete design brief should include the following data:
| Parameter | Required information |
| Flow | Normal, minimum, and maximum rate |
| Solids | Concentration, particle-size distribution, shape, and adhesion |
| Retention | Target particle size and allowable carryover |
| Pressure | Operating pressure, maximum differential pressure, and upset condition |
| Temperature | Normal and design temperature |
| Fluid | Composition, concentration, viscosity, and cleaning chemicals |
| Cleaning | Backwash, CIP, scraper, or manual cleaning |
| Connection | Flange, thread, frame, welded end, or custom interface |
Open Area and Structural Load
Open area influences throughput and pressure drop, but a higher percentage does not automatically improve performance. Profile size, support-rod spacing, weld pattern, and flow direction must also deliver adequate collapse or burst resistance. Our drawing review links these variables instead of treating slot size as an isolated purchasing parameter.
Material and Surface Requirements
Alloy Selection for Chemical Service
Material selection starts with complete process chemistry. 304 or 304L may suit mild service, while 316L often provides better resistance in many chloride-bearing environments. High chloride levels, strong acids, elevated temperature, or stress-corrosion risk may require 904L, duplex, super duplex, or a nickel alloy. The review should also cover pitting, crevice corrosion, weld heat-affected zones, and contact between dissimilar metals.
Surface Finish and Surface Treatment
Surface finish describes the resulting texture and may include a specified Ra value. Pickling, passivating, and electropolishing describe treatment processes. Specifications should state both the required roughness and any pickled, passivated, or electropolished condition.
Integrated Custom Development at Jingzhou Metal
Full-Chain Profile and Component Development
Jingzhou Metal has produced stainless steel wire since 2009 and operate three production bases covering about 18,000 m2. Our workflow connects profile development, mold maintenance, drawing, annealing, shaped rolling, fine drawing, screen fabrication, and inspection. This structure lets us coordinate profile geometry with the finished component rather than source the critical wire section separately.
Inspection Methods and Development Cycle
Infrared monitoring controls dimensional variation along each coil. One-dimensional and two-dimensional optical projectors verify profile geometry and tolerance. Spectrometric analysis confirms alloy composition, while tensile testing evaluates mechanical performance.
Jingzhou Metal supports drawing-based development for custom profiles, slots, dimensions, end connections, and packaging. Our standard new-product development cycle runs from 7 to 15 days, subject to material availability, geometry, and inspection requirements.
FAQ
How Does Flow Direction Affect a Cylindrical Screen?
External-to-internal and internal-to-external flow place different loads on the component. The design must align the working surface, support structure, and cleaning direction with the specified differential pressure.
How Do We Inspect Slot Opening?
We define inspection locations and acceptance criteria from the drawing, then use optical measurement to verify slot consistency across critical areas. Long or complex components may require a project-specific sampling plan.
Can We Develop a Replacement from a Drawing or Sample?
Yes. We can review CAD drawings or samples and develop the profile, slot, dimensions, material, and connection details. The review also checks whether the existing geometry supports the required flow and structural load.
What Determines the Inspection Plan?
Material grade, slot tolerance, component size, pressure duty, and end-use risk define the scope. A project may require alloy verification, profile and slot measurements, tensile results, dimensional records, or first-article approval.