Structured Manufacturing Data (2026)

Hood (Capture Inlet)

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Hood (Capture Inlet) used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Hood (Capture Inlet) is characterized by the integration of Flange/Rim and Duct Connection Collar. In industrial production environments, manufacturers listed on CNFX commonly emphasize Galvanized steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

The intake opening of an extraction hood/arm designed to capture and contain airborne contaminants at their source.

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Product Specifications

Technical details and manufacturing context for Hood (Capture Inlet)

Definition
The hood or capture inlet is the critical front-end component of an extraction hood or extraction arm system. It is specifically engineered to be positioned as close as possible to the emission source (e.g., welding fume, chemical vapor, dust, mist). Its primary function is to efficiently capture and contain airborne pollutants before they disperse into the surrounding workspace, ensuring effective local exhaust ventilation (LEV). The design of the inlet directly influences the capture velocity and overall efficiency of the extraction system.
Working Principle
The hood operates based on the principle of local exhaust ventilation. A fan or blower creates negative pressure (suction) within the extraction ductwork. This suction draws air and contaminants into the hood's capture inlet. The shape, size, and positioning of the hood are designed to create an effective 'capture zone' that envelops the pollutant source, pulling the contaminated air into the extraction system for filtration or safe discharge.
Common Materials
Galvanized steel, Stainless steel (e.g., 304, 316), Aluminum, Polypropylene (PP) or other chemical-resistant plastics
Technical Parameters
  • Diameter or width/height dimensions of the capture inlet opening. (mm) Standard Spec
Components / BOM
  • Flange/Rim Part
    Provides a stable mounting surface and helps define the capture zone geometry. Often includes a gasket for a better seal against work surfaces.
    Material: Steel, aluminum, or plastic
  • Duct Connection Collar Part
    The cylindrical or rectangular section that connects the hood to the flexible or rigid extraction ducting.
    Material: Steel or aluminum
  • Mounting Bracket/Clamp Part
    Allows for adjustable positioning and secure mounting of the hood onto an extraction arm or fixed stand.
    Material: Steel
  • Sparks/Debris Baffle (optional) Part
    A mesh or perforated screen inside the hood to prevent large sparks or debris from entering the ductwork, used in applications like welding.
    Material: Stainless steel mesh

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Hood (Capture Inlet).

industrial extraction hood capture inlet source capture hood for machinery manufacturing galvanized steel extraction hood inlet stainless steel 304 capture hood flange chemical-resistant polypropylene intake hood

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Extraction Hood/Arm
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Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 0.5 bar differential
flow rate: 100-5000 m³/h (depending on size)
temperature: -20°C to 120°C
slurry concentration: Not applicable - designed for airborne contaminants only
Media Compatibility
✓ Dust and particulate matter ✓ Fumes and vapors ✓ Mist and aerosols
Unsuitable: High-velocity abrasive particles (>30 m/s)
Sizing Data Required
  • Required capture velocity at source (m/s)
  • Contaminant generation rate (g/s or m³/s)
  • Distance from source to hood inlet (m)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Corrosion-induced perforation
Cause: Exposure to acidic or alkaline process fumes, moisture condensation, and lack of protective coating maintenance leading to material degradation.
Structural fatigue cracking
Cause: Cyclic thermal expansion/contraction stresses, vibration from connected ductwork/fans, and improper support alignment causing stress concentrations.
Maintenance Indicators
  • Visible rust streaks or pitting on internal/external surfaces indicating active corrosion
  • Audible rattling or banging noises during system operation signaling loose components or structural issues
Engineering Tips
  • Implement regular internal inspections using borescopes to detect early corrosion under insulation or in hidden areas
  • Install vibration monitoring sensors at mounting points and perform thermal imaging during operation cycles to identify stress hotspots

Compliance & Manufacturing Standards

Reference Standards
ISO 5801:2017 - Industrial fans - Performance testing using standardized airways ANSI/ASHRAE 110-2016 - Method of Testing Performance of Laboratory Fume Hoods DIN EN 14175-3:2019 - Fume cupboards - Part 3: Type test methods
Manufacturing Precision
  • Capture inlet diameter: +/-0.5mm
  • Face velocity uniformity: +/-10% across hood opening
Quality Inspection
  • Face Velocity Test (ANSI/ASHRAE 110)
  • Containment Test (Tracer Gas/SF6 method)

Factories Producing Hood (Capture Inlet)

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What materials are available for the capture hood inlet?

Our capture hood inlets are available in galvanized steel, stainless steel (304 and 316 grades), aluminum, and chemical-resistant plastics like polypropylene (PP) to suit different industrial environments and contaminant types.

What components are included in the capture hood inlet assembly?

The standard assembly includes a duct connection collar, flange/rim, mounting bracket/clamp, and optional sparks/debris baffle for enhanced safety in specific applications.

How does the capture hood inlet improve workplace safety in machinery manufacturing?

By capturing airborne contaminants like dust, fumes, and particulates at their source, our hood inlets prevent worker exposure, reduce equipment contamination, and help maintain compliance with industrial air quality standards.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Machinery and Equipment Manufacturing.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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.

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