INDUSTRY COMPONENT

Damper Blade

A damper blade is a pivotal airflow control component in industrial ventilation systems, designed to regulate or block air passage within ducts.

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Component Specifications

Definition
A damper blade is a flat or curved plate mounted on a rotating shaft within an air duct or housing, typically part of a damper assembly in air blowers or ventilation systems. It functions as an adjustable barrier to modulate airflow rates, pressure, or direction by pivoting between open and closed positions. In industrial applications, it ensures precise control over air distribution, energy efficiency, and system safety by managing air volume, velocity, or isolation in processes like HVAC, exhaust, or pneumatic conveying.
Working Principle
The damper blade operates on a rotational principle: it pivots around a central shaft via an actuator (manual, electric, or pneumatic). When rotated to an open position, it aligns with the airflow direction, minimizing resistance; when closed, it obstructs the duct cross-section, blocking airflow. This adjustment alters the effective flow area, thereby controlling air volume, pressure differentials, or redirecting air paths based on system demands, often integrated with control systems for automated regulation.
Materials
Common materials include galvanized steel (for corrosion resistance), stainless steel (for high-temperature or corrosive environments), aluminum (for lightweight applications), or composite polymers (for low-pressure systems). Specifications vary by thickness (e.g., 1-3 mm for steel), surface coatings (e.g., powder coating for durability), and edge seals (e.g., rubber gaskets for airtight closure).
Technical Parameters
ParameterTypical rangeNotes & selection driver
Thickness1-5 mm
Blade Width100-2000 mm
Blade Length200-3000 mm
Actuation TypeManual, Electric, Pneumatic
Shaft Diameter10-50 mm
Pressure RatingUp to 5000 Pa
Operating Temperature-20°C to 400°C

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 5211, DIN 24194

Parent Products

This component is used in the following industrial products

Air Blower/Damper

The Air Blower/Damper is an integrated component used in combustion systems to supply combustion air and regulate its flow.

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Exhaust Dampers

Mechanical devices that regulate, control, or modulate the flow of exhaust gases in industrial systems.

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Pressure balancing dampers

Mechanical devices within a main manifold that regulate and equalize fluid pressure across different zones or branches.

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Engineering Analysis

Risks & Mitigation
  • Mechanical failure due to wear or corrosion
  • Air leakage from improper sealing
  • Actuator malfunction leading to loss of control
  • Vibration-induced fatigue cracks
FMEA Triads
Trigger: Corrosion from humid or chemical exposure
Failure: Reduced blade integrity or jamming
Mitigation: Use corrosion-resistant materials (e.g., stainless steel), apply protective coatings, and implement regular inspections.
Trigger: Misalignment during installation
Failure: Increased air leakage or operational strain
Mitigation: Follow precise alignment procedures during assembly and conduct post-installation testing for seal integrity.
Trigger: Excessive airflow pressure beyond rating
Failure: Blade deformation or shaft damage
Mitigation: Design with adequate pressure ratings, install pressure relief valves, and monitor system parameters continuously.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
Dimensional tolerances per ISO 2768-m for blade flatness (±0.5 mm) and shaft alignment (±0.2°), with leakage rates below 1% of rated flow at closed position.
Test Method
Testing includes airflow performance per AMCA 500-D for pressure drop and leakage, material certification per ASTM standards, and operational cycle testing (e.g., 10,000 cycles) for durability.

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 Damper Blade

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.

ZENGO Airandus
Ningbo, Zhejiang, CN
Also makes: Ventilation Fan, Centrifugal Fan, Flexible Duct and 9 more
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.

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Frequently Asked Questions

What is the primary function of a damper blade in an air blower system?

It regulates airflow by adjusting its position to control air volume, pressure, or isolation, ensuring efficient operation and safety in systems like HVAC or exhaust.

How do I select the right material for a damper blade?

Choose based on environment: galvanized steel for general use, stainless steel for high heat/corrosion, aluminum for lightweight needs, or polymers for low-pressure applications.

What standards apply to damper blades?

Common standards include ISO 5211 for actuator mounting and DIN 24194 for airflow components, ensuring compatibility and performance in industrial settings.

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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