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Views: 0 Author: Site Editor Publish Time: 2026-06-08 Origin: Site
A Laminar Flow Pass Box is an essential cleanroom transfer device designed to safely move materials between controlled environments while minimizing contamination risks. It is widely used in pharmaceutical manufacturing, biotechnology laboratories, medical device production facilities, hospitals, and other GMP-regulated cleanroom applications.
By reducing the frequency of cleanroom door openings, a laminar flow pass box helps maintain environmental integrity, protects sensitive processes, and improves contamination control during material transfer. The integrated HEPA filtration system, UV sterilization function, and electronic interlock design work together to ensure that transferred items meet stringent cleanliness requirements before entering critical production areas.
Unlike a standard static pass box, a laminar flow pass box continuously supplies HEPA-filtered air into the transfer chamber. This creates a self-cleaning environment that removes airborne particles from the surfaces of materials before they enter the cleanroom.
The system also functions as an airlock between different cleanliness zones, helping maintain pressure differentials and reducing the risk of cross-contamination.
Because of these advantages, laminar flow pass boxes are commonly used for transferring tools, packaging materials, components, samples, and production accessories in contamination-sensitive environments.
A typical laminar flow pass box includes the following key components:
1. Differential Pressure Gauge
2. Centralized Control Panel
3. Double-Layer Tempered Glass Door
4. Stainless Steel Ergonomic Handle
5. DOP Test Port
6. Centrifugal Fan
7. PAO Injection Port
8. Gel Seal H14 HEPA Filter
9. UV Sterilization System
10. Return Air Mesh Plate
These components ensure stable airflow performance, efficient filtration, and convenient operation while supporting GMP compliance requirements.
The internal chamber is designed to achieve Class A cleanliness standards, providing a highly controlled environment for material transfer.
The pass box adopts a vertical laminar airflow configuration with top air supply and bottom air return. This airflow pattern continuously removes airborne contaminants and maintains a clean transfer environment.
The filtration system consists of:
* G4 pre-filter
This combination effectively captures airborne particles and helps maintain cleanroom cleanliness standards.
After HEPA filtration, airflow velocity is maintained between 0.36 m/s and 0.54 m/s, ensuring stable laminar airflow performance and effective particle removal.
An integrated differential pressure gauge continuously monitors filter conditions with a measuring range of 0–500 Pa and an accuracy of ±5 Pa.
The built-in electronic interlocking system prevents both doors from opening simultaneously, helping maintain cleanroom pressure balance and reducing contamination risks.
The UV lamp can operate independently to provide additional surface decontamination for transferred materials before they enter critical cleanroom areas.
Implementing a laminar flow pass box provides several advantages for cleanroom operations:
* Reduces cross-contamination during material transfer
* Minimizes cleanroom door openings
* Supports GMP and cleanroom compliance requirements
* Improves transfer efficiency
* Enhances product protection
* Maintains pressure differentials between cleanroom zones
* Supports validation and qualification activities
These benefits make the equipment an important component in modern pharmaceutical and biotechnology facilities.
Laminar flow pass boxes are widely used in:
* Pharmaceutical manufacturing plants
* Biotechnology laboratories
* Sterile drug production facilities
* Medical device manufacturing
* Research and development centers
* Hospital cleanrooms
* Cell and gene therapy laboratories
Cigeair specializes in cleanroom contamination control solutions for pharmaceutical, biotechnology, healthcare, and laboratory applications.
Our laminar flow pass boxes feature GMP-compliant designs, H14 HEPA filtration systems, electronic interlocks, UV sterilization options, and customizable configurations to meet diverse project requirements.
Whether for new cleanroom construction or facility upgrades, Cigeair provides reliable cleanroom transfer solutions that help customers improve contamination control and operational efficiency.
Looking for a customized laminar flow pass box for your cleanroom project?
Contact Cigeair today to learn more about our cleanroom transfer solutions and receive professional technical support from our engineering team.
