Demister Pad / Mesh: Wire Diameter 0.11-0.28 mm

Component Specifications

Definition

A demister pad, also known as mist eliminator or mesh pad, is a structured packing component installed in vapor-liquid separators, scrubbers, distillation columns, and other process equipment. It consists of multiple layers of knitted or woven wire mesh, typically made from corrosion-resistant materials, arranged to create a tortuous path for gas flow. As vapor passes through the mesh, liquid droplets impinge on the wire surfaces, coalesce into larger droplets, and drain away by gravity, resulting in dry vapor output and recovered liquid.

Working Principle

The demister pad operates on inertial impaction, interception, and diffusion principles. When vapor containing entrained liquid droplets flows through the mesh, droplets collide with wire surfaces due to momentum (inertial impaction). Smaller droplets follow gas streamlines but are intercepted by wires when their trajectory brings them within one droplet radius. Droplets coalesce upon contact, forming larger droplets that drain downward by gravity while cleaned vapor continues upward. Mesh density, thickness, and material determine separation efficiency and pressure drop.

Materials

Common materials include 304/316 stainless steel (standard), 304L/316L (low carbon for welding), Monel (for chloride resistance), Inconel (high temperature), polypropylene/PTFE (chemical resistance), and galvanized steel (non-corrosive applications). Wire diameters typically range 0.1-0.28mm with mesh densities of 100-200 kg/m³.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Thickness	100-150 mm standard
Efficiency	99-99.9% for droplets >3-10 microns
Mesh Density	120-180 kg/m³
Surface Area	100-300 m²/m³
Pressure Drop	25-250 Pa (0.1-1.0 in H₂O)
Wire Diameter	0.11-0.28 mm

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 2942, DIN 3168

Parent Products

This component is used in the following industrial products

Vapor-Liquid Separator

A device that separates vapor from liquid phases in a vacuum evaporation system.

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Engineering Analysis

Risks & Mitigation

Fouling/plugging from solids
Corrosion in aggressive environments
Mesh collapse from excessive pressure drop
Liquid re-entrainment at high velocities
Inefficient separation if improperly sized

FMEA Triads

Trigger: Solid particle accumulation in mesh
Failure: Increased pressure drop, reduced flow capacity
Mitigation: Install upstream filtration, implement regular cleaning protocols, use larger mesh openings for dirty services

Trigger: Corrosion from chemical attack
Failure: Mesh degradation, structural failure, contamination
Mitigation: Select appropriate corrosion-resistant materials, implement corrosion monitoring, establish replacement schedules

Trigger: Excessive vapor velocity
Failure: Liquid re-entrainment, reduced separation efficiency
Mitigation: Proper sizing based on maximum allowable velocity, install flow control devices, consider thicker pads for high-velocity applications

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Mesh density ±5%, thickness ±3mm, diameter ±2mm for custom fittings

Test Method

Separation efficiency testing per ISO 2942 using aerosol generators and particle counters; pressure drop measurement at design flow rates; material certification per ASTM/ASME standards

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

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Inspection readiness

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Supplier transparency

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Manufacturers of Demister Pad / Mesh

Manufacturer profiles associated with Demister Pad / Mesh.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What droplet size can demister pads remove?

Standard demister pads effectively remove droplets larger than 3-10 microns with 99%+ efficiency. High-efficiency designs can capture droplets down to 1 micron.

How often should demister pads be replaced?

Replacement depends on operating conditions: typically 3-10 years for clean services, 1-3 years for fouling services. Regular inspection for plugging, corrosion, or structural damage is recommended.

Can demister pads handle foaming liquids?

Standard mesh pads may flood with foaming systems. Special designs with coarser mesh or vane-type mist eliminators are preferred for foaming applications.

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.

Demister Pad / Mesh