Blade Assembly for Dampers and Louvers | Specifications & Verification

Product Specifications

Technical details and manufacturing context for Blade Assembly

Definition

The blade assembly is the core functional component within dampers and louvers, consisting of multiple blades mounted in a frame that can be adjusted to regulate airflow, control light penetration, or provide privacy. In HVAC systems, it modulates air volume; in architectural applications, it manages sunlight and visibility. The assembly is typically constructed from aluminum, galvanized steel, or stainless steel, with material grades such as 304 or 316L available for corrosive environments. Key parameters include blade width (100–600 mm), blade length (500–3000 mm), blade thickness (1.0–3.0 mm), blade pitch angle (0–90°), operating temperature (-20 to 80 °C), leakage rate (0.1–1.0%), surface finish (Ra 0.8–3.2 μm per ISO 1302), and weight (5–50 kg). These values are reference ranges and must be confirmed for the specific model and application. The assembly operates via manual levers, motorized actuators, or linkage systems that rotate blades simultaneously to control air or light passage. Selection requires specifying dimensions, material, actuation method, and performance requirements. Verification should include checking compliance with relevant standards and confirming actual performance with the manufacturer. Maintenance signals include blade misalignment, excessive play, or corrosion. Failure boundaries include material fatigue, deformation, or loss of seal integrity. Always verify model-specific values and standards with the legal manufacturer or supplier.

Working Principle

Blades are mounted on pivots within a frame. Manual levers, motorized actuators, or linkage systems rotate the blades simultaneously to change their angle relative to the airflow or light direction, thereby controlling the passage of air or light through the assembly. The blade pitch angle can be adjusted from 0 to 90 degrees, affecting airflow direction and pressure drop. The assembly is designed to operate within specified temperature and pressure ranges. Proper installation and maintenance ensure reliable operation and longevity.

Common Materials

Aluminum, Galvanized Steel, Stainless Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Blade Width	100–600 mm	Determines airflow capacity and frame size.
Blade Length	500–3000 mm	Limited by structural rigidity and deflection.
Blade Thickness	1.0–3.0 mm	Affects strength and weight.
Blade Pitch Angle	0–90 °	Controls airflow direction and pressure drop.
Operating Temperature	-20–80 °C	Beyond range may cause material degradation.
Leakage Rate	0.1–1.0 %	Class A to D depending on application.
Material Grade	304/316L	316L for corrosive environments.ASTM A240
Surface Finish	Ra 0.8–3.2 μm	Smoother finish reduces fouling.ISO 1302
Weight	5–50 kg	Depends on size and material.

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

Blade Part
Primary element that physically obstructs or directs airflow/light

Material: Aluminum/Steel
Pivot Pin/Bearing Part
Allows individual blades to rotate within the frame

Material: Stainless Steel/Brass
Linkage Rod Part
Connects all blades to ensure simultaneous rotation

Material: Steel
End Frame/Channel Part
Structural frame that holds the blade assembly together

Material: Galvanized Steel/Aluminum
Motorized Actuator Optional
Swings the whole blade set on powered builds; manual builds use a lever instead.

Applied To / Applications

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

Dampers / Louvers

View system integration details

Dampers/Regulators

View system integration details

Manufacturers of Blade Assembly

Manufacturer profiles associated with Blade Assembly.

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Frequently Asked Questions

What materials are available for blade assemblies?

Blade assemblies are commonly made from aluminum, galvanized steel, or stainless steel. For corrosive environments, stainless steel grades such as 304 or 316L are specified. The choice depends on the application and environmental conditions.

How do I select the correct blade assembly size?

Selection is based on required airflow capacity and frame dimensions. Key parameters include blade width (100–600 mm), length (500–3000 mm), and thickness (1.0–3.0 mm). These values are reference ranges; confirm with the manufacturer for your specific application.

What standards apply to blade assemblies?

Relevant standards include and leakage rate, ISO 1302 for surface finish, and ASTM A240 for material grades. These standards serve as verification references; actual compliance must be confirmed with the supplier.

What are common maintenance indicators?

Signs that maintenance is needed include blade misalignment, excessive play in the pivot mechanism, corrosion on blade surfaces, or difficulty in adjusting the blades. Regular inspection and cleaning can prevent performance degradation.

Data Basis

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

Preliminary Technical Classification

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pressure:	Up to 1.5 bar differential
flow rate:	0-15 m/s air velocity
temperature:	-40°C to 150°C
slurry concentration:	Not applicable - designed for clean air/gas applications

Blade Assembly

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards