Editorial Technical Reference

Hood Body/Enclosure

This page explains how Hood Body/Enclosure is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

The main structural housing of a fume extraction hood that contains and directs airflow.

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Hood Body/Enclosure in a manufacturing environment
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Product Specifications

Technical details and manufacturing context for Hood Body/Enclosure

Definition
The hood body or enclosure is the primary structural component of a fume extraction hood, forming the physical chamber that captures, contains, and channels contaminated air, fumes, or particulates away from the work area. It provides the necessary geometry to ensure efficient airflow and containment. The body is typically fabricated from sheet metal such as stainless steel, galvanized steel, or aluminum, with material selection based on corrosion resistance, cost, and application requirements. Common material grades include Q235B carbon steel, 304 and 316L stainless steel, referenced against standards like GB/T 700, GB/T 3280, and ASTM A240. Sheet thickness typically ranges from 1.5 to 3.0 mm, with thicker material used for larger hoods or higher pressure applications. Standard dimensions vary from 600×600×800 mm to 2000×1500×2000 mm, with custom sizes available. The inlet diameter matches the duct size and ranges from 100 to 400 mm. Airflow capacity is typically 500 to 5000 m³/h, and static pressure ranges from 500 to 2000 Pa, ensuring compatibility with exhaust fans. Operating temperature is rated from -20°C to 80°C, with higher ratings possible for special coatings. Sealing class ranges from IP54 to IP65 per IEC 60529, with IP65 suitable for washdown environments. Surface treatments include powder coating or galvanizing for corrosion protection. Weight varies from 50 to 500 kg depending on size and material. Dimensional tolerances are ±1.0 mm per ISO 2768-m. Pressure rating is 1.0 to 1.6 MPa. These values are reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier.
Working Principle
The hood body acts as a physical barrier and conduit. Contaminated air is drawn into the enclosure through its open face or capture points by negative pressure created by an exhaust fan. The body's shape and internal surfaces guide this airflow towards the duct connection, minimizing turbulence and preventing the escape of contaminants back into the workspace. The enclosure's geometry, including its dimensions and inlet configuration, is designed to optimize capture efficiency and maintain a safe working environment. Proper sealing and material integrity are essential to prevent leaks and ensure consistent performance.
Common Materials
Stainless Steel, Galvanized Steel, Aluminum
Technical Parameters
ParameterTypical rangeNotes & selection driver
MaterialQ235B / 304 / 316LCarbon steel for cost, stainless for corrosion resistanceGB/T 700, GB/T 3280, ASTM A240
Thickness1.5–3.0 mmThicker for larger hoods or higher pressure
Dimensions (L×W×H)600×600×800 – 2000×1500×2000 mmCustom sizes available
Inlet Diameter100–400 mmMatches duct size
Airflow Capacity500–5000 m³/hHigher for larger hoods
Static Pressure500–2000 PaEnsure fan compatibility
Operating Temperature-20–80 °CHigher for special coatings
Sealing ClassIP54–IP65IP65 for washdown environmentsIEC 60529
Surface TreatmentPowder coating / GalvanizedCorrosion protection
Weight50–500 kgDepends on size and material
Tolerance±1.0 mmFor critical mounting dimensionsISO 2768-m

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

Components / BOM
  • Duct Collar/Flange Part
    Connection point for attaching the exhaust ductwork to the hood body.
    Material: Steel
  • Baffles/Deflectors Part
    Internal plates or vanes that help distribute airflow evenly and prevent backflow within the hood.
    Material: Steel
  • Access Panel/Door Part
    Removable section for maintenance, inspection, or cleaning of the interior and filters.
    Material: Steel with gasket
  • Enclosure Body
    The formed shell itself — the barrier that contains the contaminated air and steers it toward the duct.
    Material: Sheet steel or stainless steel

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: -500 Pa to +500 Pa (typical), up to ±2000 Pa (reinforced designs)
flow rate: 100-10,000 m³/h (standard range), higher with custom sizing
temperature: -20°C to +80°C (standard polymer), up to +150°C (specialized materials)
slurry concentration: Not applicable (designed for gaseous/particulate flow, not liquid slurry)
Media Compatibility
✓ Laboratory chemical fumes (acids, solvents) ✓ Welding/grinding particulate exhaust ✓ Food processing steam/moisture extraction
Unsuitable: High-concentration corrosive gases (e.g., chlorine, concentrated HF) without specialized lining
Sizing Data Required
  • Required airflow volume (m³/h)
  • Duct connection diameter/geometry
  • Hood opening dimensions (width × depth)

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Corrosion and rust formation
Cause: Exposure to moisture, chemicals, or corrosive environments without adequate protective coatings or material selection.
Structural fatigue and cracking
Cause: Vibration, thermal cycling, or mechanical stress leading to material fatigue and eventual failure at weld points or seams.
Maintenance Indicators
  • Visible rust spots or paint peeling indicating corrosion progression
  • Unusual vibrations or rattling noises suggesting loose fasteners or structural compromise
Engineering Tips
  • Implement regular coating inspections and touch-up protocols using corrosion-resistant paints or protective coatings
  • Install vibration monitoring and conduct periodic torque checks on fasteners to maintain structural integrity

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 14120:2015 Safety of machinery - Guards - General requirements for the design and construction of fixed and movable guards ANSI/ASSE Z244.1-2016 Control of Hazardous Energy - Lockout/Tagout and Alternative Methods DIN EN 1090-2:2018 Execution of steel structures and aluminium structures - Part 2: Technical requirements for steel structures

Quoted from the published standard.

Manufacturing Precision
  • Flatness: +/- 0.5 mm per meter
  • Hole diameter: +/- 0.1 mm
Quality Inspection
  • Dimensional Verification with CMM (Coordinate Measuring Machine)
  • Visual and Dye Penetrant Test for weld integrity
Technical documentation
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Manufacturing capability
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Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
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Manufacturers of Hood Body/Enclosure

Manufacturer profiles associated with Hood Body/Enclosure.

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Frequently Asked Questions

What materials are commonly used for hood bodies?

Common materials include stainless steel (grades 304 and 316L), galvanized steel, and aluminum. Carbon steel (Q235B) is also used for cost-sensitive applications. Material selection depends on corrosion resistance, temperature, and chemical exposure. Always verify material suitability with the manufacturer for your specific process.

How do I determine the correct airflow capacity for my hood?

Airflow capacity depends on the hood size, capture velocity required, and the type of contaminants. The reference range is 500 to 5000 m³/h. Consult an engineer or the manufacturer to calculate the required airflow based on your work area and local regulations.

What is the significance of the pressure rating?

The pressure rating (1.0 to 1.6 MPa) indicates the maximum internal pressure the hood body can withstand. It is important for ensuring structural integrity and preventing deformation or leakage. Verify that the rating matches your system's operating pressure.

Can the hood body be customized to fit my ductwork?

Yes, custom sizes are available. The inlet diameter can be matched to your duct size, typically ranging from 100 to 400 mm. Provide your duct dimensions and layout to the manufacturer to ensure proper fit and airflow performance.

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

Related equipment

Applied To / Applications

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

Fume Extraction Hood
View system integration details

Industrial Ecosystem & Supply Chain Structure

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

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.

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 · Page last updated 12 October 2026

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