INDUSTRY COMPONENT

Exhaust Hood

Exhaust hood for removing combustion byproducts and fumes from automated ladle preheating stations in metal manufacturing.

Component Specifications

Definition
A specialized industrial exhaust hood designed for automated ladle preheating stations that captures and removes hazardous combustion byproducts, including carbon monoxide, sulfur oxides, nitrogen oxides, and particulate matter generated during the preheating process. The component features optimized airflow dynamics, heat-resistant construction, and integrated safety systems to maintain safe working environments in foundry operations.
Working Principle
Operates on negative pressure differential principle where exhaust fans create suction through the hood opening, capturing contaminated air at the source. The system utilizes computational fluid dynamics (CFD) optimized capture velocities (0.5-1.0 m/s) to effectively contain and remove fumes while minimizing energy consumption. Thermal buoyancy principles are leveraged to enhance capture efficiency of hot gases rising from preheated ladles.
Materials
Primary structure: 304/316L stainless steel (1.5-3.0 mm thickness) for corrosion resistance; Internal lining: Ceramic fiber insulation (1260°C rating); Seals: High-temperature silicone gaskets; Fasteners: A4-80 stainless steel bolts; Optional coatings: High-temperature ceramic coating for extended service life.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Weight85-220 kg depending on size
Noise Level<75 dB(A) at 1m distance
Static Pressure250-500 Pa
Airflow Capacity5000-15000 m³/h
Capture Velocity0.5-1.0 m/s
Connection Diameter400-800 mm ducting
Operating TemperatureUp to 800°C continuous
Hood Opening Dimensions1200x800 mm to 2000x1200 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 21904-1:2020, ISO 14123-2:2015, DIN EN 1093-3, DIN 24196

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Heat damage to structural components
  • Inadequate fume capture leading to worker exposure
  • Fire hazard from accumulated combustible deposits
  • Corrosion from acidic combustion byproducts
FMEA Triads
Trigger: Thermal cycling causing metal fatigue
Failure: Crack formation in hood structure
Mitigation: Implement thermal stress analysis in design, use expansion joints, schedule regular NDT inspections
Trigger: Insufficient maintenance of capture surfaces
Failure: Reduced capture efficiency below safety thresholds
Mitigation: Establish preventive maintenance schedule, install airflow monitoring sensors, implement cleaning protocols

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
±5% on airflow specifications, ±2° on mounting angle alignment, ±3 mm on flange dimensions
Test Method
ISO 21904-1:2020 for capture efficiency testing, EN 1093-3 for containment verification, ASTM E84 for surface burning characteristics

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 Exhaust Hood

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

Jiangxi Youjia Laboratory Equipment Co., Ltd. (YOJIA Lab)
Nanchang, Jiangxi, CN
approx. 10,000 m² (company-stated)
Also makes: API Interface Layer
Managed by the manufacturer
Listed on the company's own website
HAMECC(Shanghai)Lab Solutions Co.,Ltd
Shanghai, CN
Listed on the company's own website · profile compiled by CNFX from public sources
HMFoodTech
Jilin, CN
Listed on the company's own website · profile compiled by CNFX from public sources

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

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Frequently Asked Questions

What maintenance is required for exhaust hoods in ladle preheating applications?

Monthly inspection of seals and gaskets, quarterly cleaning of internal surfaces to remove particulate buildup, annual verification of capture velocities, and replacement of ceramic insulation every 3-5 years depending on operating conditions.

How is capture efficiency measured for these exhaust hoods?

Capture efficiency is measured using tracer gas testing (SF6 or CO2) according to ISO 21904 standards, with typical requirements of ≥95% capture efficiency for hazardous fumes at design operating conditions.

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.

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