Weir: Height 10-200 mm, Tolerance ±0.5 mm

Component Specifications

Definition

A weir is a precision-engineered component typically integrated into trays, sieves, or valve assemblies to regulate the flow, depth, or distribution of materials (liquids, powders, granules) by creating a controlled overflow or barrier. It ensures uniform processing, separation efficiency, and process stability in applications like screening, sedimentation, or dosing.

Working Principle

Operates by creating a physical barrier at a specific height within a tray or channel. Materials flow over the weir's crest, with the overflow rate determined by the weir's geometry (e.g., notch shape, height), allowing for controlled separation, metering, or distribution based on fluid dynamics or particle size.

Materials

Stainless steel (AISI 304/316 for corrosion resistance), aluminum alloys (for lightweight applications), engineered plastics (e.g., PTFE, UHMW-PE for chemical inertness), or coated metals for abrasion resistance.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Height	10-200 mm
Length	Custom to tray width
Tolerance	±0.5 mm
Notch Type	Rectangular, V-notch, or Cipolletti
Surface Finish	Ra ≤ 1.6 μm

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 14122-3, DIN 19569

Parent Products

This component is used in the following industrial products

Trays

Internal components within a fractionating column that provide vapor-liquid contact surfaces for mass transfer during distillation.

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Distillation Trays/Packing

Internal components within a concentration column that provide surface area for vapor-liquid contact during distillation.

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Engineering Analysis

Risks & Mitigation

Improper installation leading to flow irregularities
Material corrosion or wear reducing efficiency
Clogging from particulate buildup

FMEA Triads

Trigger: Incorrect weir height calibration
Failure: Uneven material distribution or overflow
Mitigation: Regular calibration and use of precision measurement tools

Trigger: Abrasive material contact
Failure: Premature wear or damage to weir edge
Mitigation: Apply wear-resistant coatings or select hardened materials

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Dimensional tolerance per ISO 2768-m, surface compliance with FDA/USP Class VI for food/pharma

Test Method

Flow rate testing per ASTM D4169, material verification via spectrometry

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Weir

Manufacturer profiles associated with Weir.

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Frequently Asked Questions

What is the primary function of a weir in industrial trays?

To regulate material flow or depth, ensuring consistent separation, distribution, or processing in equipment like sieves or valves.

How do I select the right weir material?

Choose based on process conditions: stainless steel for corrosion resistance, plastics for chemical inertness, or coated metals for abrasive environments.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Weir