Complete Guide to Laminar Flow Pass-Through Windows
Created on 07.07
Complete Guide to Laminar Flow Pass-Through Windows
Essential Equipment for Cleanroom and Laboratory Applications
一、Principle of Laminar Flow Pass-Through Window
The laminar flow pass-through window operates on the principle of unidirectional airflow, where HEPA-filtered air moves in parallel streams at constant velocity. This creates a sterile barrier between two environments while allowing safe transfer of materials. The vertical or horizontal laminar flow pattern prevents cross-contamination by maintaining positive pressure and sweeping away airborne particles.
二、Internal Structure of Laminar Flow Pass-Through Window
The standard internal components include:
· HEPA/ULPA filters (99.99% efficiency at 0.3μm)
· Blower/fan system with variable speed control
· UV sterilization lamps (optional)
· Stainless steel or powder-coated interior
· Interlocking doors with safety mechanism
· Control panel with timer and airflow monitor
· Pre-filters for extended HEPA filter life
三、Usage Methods and Precautions
Operation Procedure:
1. Activate the unit 15-30 minutes before use for proper air purification
2. Place items in the chamber and close the sending side door
3. Open the receiving side door only after confirming proper airflow
4. Remove items and close the door immediately after transfer
Precautions:
· Never open both doors simultaneously
· Regularly clean surfaces with appropriate disinfectants
· Monitor pressure differentials and airflow velocity
· Replace filters according to manufacturer schedule
· Avoid overloading the chamber
四、Functions of Laminar Flow Pass-Through Window
Key applications include:
· Material transfer between cleanrooms of different classes
· Isolation barrier in pharmaceutical production
· Contamination control in microbiological labs
· Sterile transfer in hospital pharmacies
· ESD-protected component transfer in electronics manufacturing
五、Laminar Flow Pass-Through Window Standards
Compliance with international standards:
· ISO 14644 (Cleanroom standards)
· EU GMP Annex 1
· USP <797> Pharmaceutical Compounding
· IEST-RP-CC002 (HEPA filters)
· EN 12469 (Biological safety cabinets)
FAQ
Guangzhou Cleanroom Construction Co., Ltd. specializes in high-quality laminar flow pass-through windows for pharmaceutical, medical, laboratory, and electronics industries. Our products meet international standards and can be customized for your specific cleanroom requirements.
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