BIBO Filter Box | Bag in Bag Out Filter for Containment

Why Choose Our BIBO Filter Box?

We offer customizable bag in bag out filter units with horizontal/vertical 304 stainless steel housings. Featuring zero-exposure filter replacement, F6 + H14 multi-stage filtration and optional automatic/manual PAO scanning devices. Superior silicone sealing ensures reliable containment. All units support PAO leak testing and can be customized to satisfy your airflow, layout and global cleanroom compliance requirements.

The BIBO Filter Box (Bag-In/Bag-Out Filter Box), integrated with an internal bag in bag out filter, is a high-security containment filtration system designed for environments where pollutant dispersion must be strictly controlled. During filter replacement, operators perform all necessary procedures inside a sealed containment bag from the outside. This completely eliminates direct contact with toxic, hazardous, or high-risk contaminants, effectively preventing pollutant leakage and ensuring the safety of both operating personnel and the surrounding environment.

Product Features

• Zero-Exposure Maintenance: The BIBO Filter Box incorporates a fully sealed design. Utilizing the protective bag-in/bag-out mechanism, it achieves complete isolation during filter replacement, eliminating operator exposure risks.

• Durable & Airtight Construction: Constructed from high-grade 304 stainless steel with precision welding, the housing offers exceptional corrosion and wear resistance, ensuring long-term structural stability and superior airtight integrity.

• High-Efficiency Filtration: Equipped with a high-efficiency bag in bag out filter featuring a filtration efficiency of ≥99.99% , effectively capturing fine particulate matter and hazardous contaminants.

• Real-Time Pressure Monitoring: The BIBO Filter Box features an integrated differential pressure gauge to monitor resistance changes across the filter media, enabling operators to determine the optimal timing for bag in bag out filter replacement.

• Flexible Customization: Supports custom configurations for filter grades, dimensions, and duct connection interfaces, allowing seamless adjustment of the BIBO Filter Box and bag in bag out filter specifications to meet diverse application requirements.

Working Principle

During operation, contaminated air passes into the filtration chamber of the BIBO Filter Box after preliminary pre-treatment. The internal bag in bag out filter deeply traps contaminants, releasing purified air into the clean zone.

When the filter reaches the end of its service life, the operator attaches a specialized containment bag to the service flange of the BIBO Filter Box. The old bag in bag out filter is removed and the new filter is installed entirely within the bag. The used filter remains sealed inside the bag for safe disposal while the new filter is secured into place. Throughout the process, the protective bag acts as a physical barrier between the interior and exterior environments, preventing any contaminant leakage.

The complete system—combining the BIBO Filter Box with the bag in bag out filter—is widely utilized in high-containment environments such as biosafety laboratories (BSL-3/BSL-4), pharmaceutical cleanrooms, hazardous chemical processing facilities, nuclear facilities, and precision electronics manufacturing. It ensures safe filter replacement while safeguarding environmental purity and personnel health.

FAQ Section for BIBO Filter Box

1. How does the Bag-In/Bag-Out (BIBO) design ensure zero contamination during filter replacement?

The system uses a specialized, heavy-duty PVC containment bag attached to the access flange of the BIBO Filter Box. During replacement, the operator performs all unbolting, filter removal, and new filter installation entirely inside the sealed bag from the outside. The contaminated filter is sealed inside the old bag before removal, while the new filter is secured via a new bag. This physical barrier ensures that hazardous particles, pathogens, or toxic substances never escape into the room or come into direct contact with maintenance staff.

2. What validation documents and factory test reports (FAT) are provided with the BIBO Filter Box?

Because BIBO systems are often installed in high-containment environments (like BSL-3/BSL-4 labs or cGMP pharma facilities), every unit undergoes rigorous Factory Acceptance Testing (FAT) prior to dispatch. We provide complete validation documentation, including Housing Pressure Integrity Test Reports (proving zero cabinet leakage), PAO/DOP Filter Leak Test Certificates ( ≥99.99% efficiency), material certificates (304/316L SS), and optional DQ/IQ/OQ validation protocols to support your local regulatory compliance audits.

3. Can the BIBO Filter Box be customized for multi-stage filtration and different airflow duct connection types?

Yes, absolutely. We offer fully customizable housing configurations based on your ventilation system's CFM/airflow requirements. You can opt for a single-stage HEPA setup or a multi-stage combination (e.g., Pre-filter + HEPA filter + Carbon/VOC filter inside a single BIBO housing). Additionally, connection flanges (circular or rectangular), manual/pneumatic isolation dampers, and bio-decontamination ports (like VHP injection ports) can be integrated to seamlessly match your site's ductwork.

Factory Environment

Case Studies