Fume Extraction Hood: Connection Diameter 8-16 inches

Component Specifications

Definition

A fume extraction hood is an engineered ventilation device designed to capture airborne contaminants at their source within an Automated Chemical Drum Filling and Sealing System. It consists of a canopy or enclosure positioned directly over the filling and sealing points, connected to a ducting system and an exhaust fan. Its primary function is to create a negative pressure zone that draws hazardous vapors, mists, and dust away from the operator's breathing zone and the general workspace, channeling them through filtration or scrubbing systems before safe discharge or recirculation. This component is essential for maintaining occupational health standards, preventing atmospheric contamination, and ensuring process safety by mitigating fire and explosion risks from volatile organic compounds (VOCs).

Working Principle

The hood operates on the principle of local exhaust ventilation (LEV). It is strategically positioned to capture contaminants at the point of generation. An induced airflow, created by an external exhaust fan, pulls the contaminated air into the hood's intake. The design (e.g., canopy, slot, booth) and capture velocity are calculated based on the chemical's vapor pressure, density, and the process emission rate to ensure efficient containment. The captured air is then transported through ductwork to an air pollution control unit (like a scrubber or filter) for treatment before being exhausted.

Materials

Typically constructed from corrosion-resistant materials to withstand aggressive chemical environments. Common specifications include: 316L stainless steel (for high corrosion resistance), polypropylene (PP) or polyethylene (PE) for certain acids, or powder-coated carbon steel for less aggressive applications. Gaskets and seals are often made from Viton, EPDM, or PTFE to ensure chemical compatibility and airtight sealing.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Lighting	Integrated explosion-proof LED lighting (optional)
Hood Type	Canopy, Slot, or Enclosing
Face Dimensions	Customizable to drum size (e.g., 24" x 36")
Static Pressure	1.0-3.0 inches H2O
Airflow Capacity	1000-5000 CFM (varies with hood size and capture velocity)
Capture Velocity	100-200 fpm at the hood face
Fire Suppression	Integrated sprinkler or foam inlet (optional)
Connection Diameter	8-16 inches

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 21904-1:2020 (Welding fumes), DIN EN 14175 (Fume cupboards), OSHA 29 CFR 1910.106 (Flammable liquids), NFPA 91 (Exhaust Systems)

Parent Products

This component is used in the following industrial products

Automated Chemical Drum Filling and Sealing System

This integrated industrial system is designed for the safe, accurate, and efficient transfer of liquid or viscous chemicals from bulk storage into standard industrial drums (e.g., 55-gallon/200L).

View Product Details

Automated Mold Spraying and Cooling System

This automated system is designed for continuous casting and metal forming operations in basic metal manufacturing.

View Product Details

Engineering Analysis

Risks & Mitigation

Inadequate capture leading to operator exposure to toxic vapors
Corrosion failure of hood material
Ductwork fire or explosion from flammable vapor accumulation
System blockage reducing airflow
Electrical hazards in explosive atmospheres (if not properly rated)

FMEA Triads

Trigger: Incorrect hood placement or insufficient capture velocity.
Failure: Failure to capture hazardous fumes, resulting in operator inhalation and atmospheric contamination.
Mitigation: Perform initial and periodic capture velocity testing (e.g., with smoke tubes). Use CFD modeling during design. Implement airflow monitoring alarms.

Trigger: Chemical attack on hood material (e.g., using SS304 instead of SS316L for chlorides).
Failure: Corrosion and perforation of the hood, leading to leaks and structural failure.
Mitigation: Conduct thorough chemical compatibility analysis during specification. Use corrosion-resistant materials. Implement regular visual inspection programs.

Trigger: Accumulation of flammable residues in the ductwork or on filters.
Failure: Fire or explosion within the extraction system.
Mitigation: Use approved cleaning schedules. Install spark detection and suppression systems. Ensure ductwork is electrically grounded. Select appropriate filter media.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Airflow deviation must not exceed ±10% of design specification. Capture velocity must be maintained above the minimum calculated safe level at all operating points.

Test Method

Performance verification via ANSI/ASSE Z9.2 or equivalent: using an anemometer or velometer to measure face velocity at multiple points, smoke tube visualization to confirm capture, and manometer readings to verify system static pressure. Documentation of 'as-built' performance is required for OSHA compliance.

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 Fume Extraction Hood

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Guangsheng Technology Wuxi

Shanghai, CN

Also makes: Battery Rack/Enclosure, Extraction Hood/Arm, Gas Cylinder/Generator

Listed on the company's own website · profile compiled by CNFX from public sources

View profile Send enquiry

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

Related Components

Safety Enclosure & Ventilation

Safety enclosure and ventilation system for automated chemical storage and retrieval systems, designed to contain hazardous materials and maintain safe air quality.

Management Software License

Digital license enabling access to management software for automated chemical drum labeling and tracking systems.

Polymer backbone

The primary molecular chain in high-purity industrial adhesive base resins that determines structural integrity and bonding properties.

Reactive functional groups

Reactive functional groups are specific molecular structures in high-purity industrial adhesive base resins that enable chemical bonding and cross-linking during curing processes.

Frequently Asked Questions

How is the capture velocity for a fume extraction hood determined?

Capture velocity is determined by the characteristics of the contaminant (e.g., vapor density, toxicity, emission velocity) and the hood design. For low-volatility vapors from drum filling, a capture velocity of 100-150 fpm is typical. Engineering calculations or CFD simulations are used to ensure the velocity is sufficient to overcome cross-drafts and capture fumes effectively.

What maintenance is required for a fume extraction hood?

Regular maintenance includes visual inspection for corrosion or damage, checking and cleaning filters or scrubber media, verifying airflow and capture velocity with an anemometer, inspecting ductwork for leaks or buildup, and testing any integrated safety devices (e.g., airflow sensors, fire suppression inlets). Maintenance schedules should follow manufacturer guidelines and risk assessments.

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.

Fume Extraction Hood