Perforated Diffuser Panel for Laminar Flow Aseptic Chambers

Product Specifications

Technical details and manufacturing context for Perforated Diffuser Panel

Definition

The Perforated Diffuser Panel is a component used in aseptic chambers with laminar flow, typically installed in the ceiling or wall. Its primary function is to convert high-velocity, turbulent filtered air from a plenum into a low-velocity, uniform, unidirectional airflow. The panel features precisely engineered perforations that break up the incoming air stream, eliminating turbulence and ensuring a consistent laminar flow that sweeps contaminants away from the critical work zone, thereby maintaining sterility. Constructed from materials such as stainless steel (304 or 316L) or powder-coated aluminum, the panel is available in standard sizes like 600×600 mm for cleanroom ceiling grids. Key parameters include thickness (1.0–2.0 mm), open area ratio (30–50%), hole diameter (1.0–3.0 mm), and hole pitch (2.5–5.0 mm), which are selected to achieve the required airflow uniformity (typically ±15% of mean velocity per ISO 14644-3). Pressure drop ranges from 50 to 150 Pa at rated airflow, influencing fan selection. The panel operates within a temperature range of -40 to 85°C and features a surface finish of Ra 0.8–1.6 μm to minimize particle retention. Flatness tolerance is ±0.5 mm per ISO 2768-1, ensuring proper sealing in the frame. Weight for a 600×600 panel is approximately 2.5–4.0 kg. These specifications are reference values; actual model-specific data must be verified with the manufacturer or supplier. The panel is a critical component for maintaining cleanroom classifications and is used in pharmaceutical, biotechnology, and electronics manufacturing environments.

Working Principle

Filtered air is supplied to the plenum above the panel. The air is forced through the array of small, evenly spaced perforations in the panel. This process converts the high-velocity, turbulent air from the plenum into a low-velocity, uniform, and laminar sheet of air. The pattern and size of the perforations are calculated to provide the required air velocity and uniformity (e.g., ±20% of mean velocity) across the entire panel surface.

Common Materials

Stainless Steel (304 or 316L), Powder-Coated Aluminum

Technical Parameters

Parameter	Typical range	Notes & selection driver
Panel Size	600×600 mm	Standard size for cleanroom ceiling grids
Thickness	1.0–2.0 mm	Affects rigidity and airflow resistance
Open Area Ratio	30–50 %	Higher ratio reduces pressure drop
Hole Diameter	1.0–3.0 mm	Smaller holes improve air distribution
Hole Pitch	2.5–5.0 mm	Uniform pitch ensures even airflow
Airflow Uniformity	±15 %	Deviation from average velocity across panelISO 14644-3
Pressure Drop	50–150 Pa	At rated airflow; affects fan selection
Operating Temperature	-40–85 °C	For cleanroom environments
Material	304 SS	Corrosion-resistant; 316L optionalASTM A240
Surface Finish	Ra 0.8–1.6 μm	Smooth finish minimizes particle retentionISO 4287
Flatness Tolerance	±0.5 mm	Ensures proper sealing in frameISO 2768-1
Weight	2.5–4.0 kg	For 600×600 panel; affects handling

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

Panel Sheet Part
The main structural body containing the perforated pattern.

Material: Stainless Steel or Aluminum
Frame/Seal Part
Provides structural support and ensures an airtight seal between the panel and the chamber ceiling/wall.

Material: Stainless Steel or Aluminum with gasket

Applied To / Applications

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

Aseptic Chamber with Laminar Flow

View system integration details

Manufacturers of Perforated Diffuser Panel

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Frequently Asked Questions

What materials are available for the perforated diffuser panel?

The panel is available in stainless steel (304 or 316L) or powder-coated aluminum. The choice depends on corrosion resistance requirements and cleanroom class.

How is airflow uniformity achieved?

Airflow uniformity is achieved through the precise design of perforation size, spacing, and open area ratio. The panel is engineered to deliver a uniform velocity profile, typically within ±15% of the mean velocity, as per ISO 14644-3.

What is the typical pressure drop across the panel?

The pressure drop ranges from 50 to 150 Pa at rated airflow. This value is important for fan selection and system design. Actual pressure drop should be confirmed for the specific model and operating conditions.

Can the panel be used in high-temperature environments?

The panel is rated for operating temperatures from -40°C to 85°C. For applications outside this range, consult the manufacturer for suitability.

Data Basis

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

Preliminary Technical Classification

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pressure:	Max 0.5 bar differential pressure
flow rate:	0.1 to 2.0 m/s face velocity
temperature:	-20°C to 80°C
slurry concentration:	Not applicable - designed for clean air/gas only

Perforated Diffuser Panel

Product Specifications

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