Laminar Flow Ceiling

Laminar flow ceiling, also known as vertical laminar air supply ceiling, is the core top air purification system for high-grade cleanrooms requiring Class 100 / ISO 5 unidirectional airflow. Composed of modular ceiling frame, HEPA terminal filter boxes, uniform flow diffusers, air plenum chamber and support suspension structure, it converts turbulent supply air from central HVAC into steady, even vertical laminar flow downward to the working zone. It continuously sweeps away dust, bacteria and suspended particles, maintaining consistent ultra-clean environment without airflow vortexes or contamination retention areas.

Main Components & Material Details

1. Modular Ceiling Support Frame

• Material: Galvanized steel with epoxy coating / SUS304 stainless steel, anti-rust and corrosion-resistant;

• Structure: Standard modular T-grid splicing frame, unified size matching common HEPA filter dimensions (570×570 / 610×610 / 1220×610mm);

• Process: Fully sealed splicing joints with silicone food-grade sealing strips to prevent air bypass leakage between frames; all inner/outer corners rounded, no sanitary dead corners for easy disinfection.

2. HEPA Terminal Filter Units (Core Filtration Part)

Each grid position is equipped with independent HEPA terminal filter box:

• Filter grade: H13 (≥99.99% @0.3μm) / H14 (≥99.995% @0.3μm); gel-seal design for zero bypass leakage;

• Standard configuration: PAO aerosol test ports + differential pressure sampling taps for regular filter integrity validation as per GMP/FDA;

• Quick cam lock structure for tool-free filter replacement, avoiding secondary pollution during maintenance.

3. Uniform Flow Diffuser Plate

Installed at the air outlet below each HEPA filter box:

• Options: Perforated aluminum diffuser plate, 4-way flow equalization grille, swirl diffuser;

• Function: Break concentrated airflow into evenly distributed vertical laminar flow, control indoor wind speed at 0.3–0.45m/s uniformly across the entire ceiling coverage area, eliminate local high wind speed or static dead zones.

4. Upper Air Plenum Chamber

• Enclosed static pressure chamber above the ceiling frame, connected to central air supply duct;

• Internal reinforced structure stabilizes air pressure, balances airflow volume for every HEPA filter unit, ensuring consistent air output of each filter without deviation;

• Optional built-in air volume balancing dampers for independent wind speed adjustment of single filter modules.

5. Suspension Installation System

• Galvanized steel hanging rods + adjustable suspension brackets; height adjustable on-site to adapt different ceiling heights;

• Shock-absorbing gasket between frame and hanging parts to reduce vibration transmission from air supply fans, avoid dust shedding caused by long-term vibration.