Bag-in bag-out HEPA filter housing with sealed access door

Laminar Flow and Containment Equipment

Bag-In/Bag-Out Filter Housing

A welded safe-change housing that uses a flexible containment bag over the access collar so loaded filters can be removed and replaced without direct exposure.

Safe-Change Bagging Collar
Welded Pressure Housing
Positive Filter Compression
Sealed Removable Access Door

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Product Introduction

The BIBO housing encloses a prefilter, HEPA or molecular filter within a welded duct section. A ribbed collar surrounds the service opening and stores a change-out bag behind the access door. During filter replacement, the bag is extended over the operator's hands and the loaded filter, then sealed before removal. A positive clamping mechanism compresses the filter gasket or gel seal, while optional dampers isolate airflow during service.

Key Features

A ribbed service collar retains the containment bag and security strap.

The loaded filter is handled entirely inside the extended change bag.

A positive clamp applies repeatable pressure to the filter seal.

A gasketed access door closes the bag and filter compartment during operation.

Modular sections can combine prefilter, HEPA, damper and test-access stages.

Customer Product Concerns

The filter retains concentrated contamination, making replacement a critical exposure point unless the service opening remains enclosed.

Removing the access door exposes the loaded filter.The stored bag extends over the service opening before the filter is handled.

The filter gasket is compressed unevenly.A positive clamping mechanism applies controlled pressure around the frame.

The used bag stub leaves the collar exposed.A new bag captures and seals the retained stub before the next change.

Air continues through the housing during service.Upstream and downstream isolation dampers can close the filter section.

Typical Applications

Pharmaceutical exhaust filtrationBiosafety laboratory exhaustAnimal facility air systemsHazardous dust collection

Technical Parameters

Typical configurable construction ranges for a bag-in/bag-out filter housing are listed below.

Core Material	Welded SUS304 or SUS316L housing with PVC or polyethylene change bag and stainless filter-clamp mechanism
Panel Thickness	40-100 mm housing flange and insulated service sections
Effective Width	305-610 mm nominal filter face width
Maximum Length	Up to 1800 mm multi-stage housing length
Steel Facing Thickness	2.0-4.0 mm welded stainless housing wall
Core Density	Approximately 7900-8000 kg/m³ for austenitic stainless housing material
Thermal Conductivity	14-16 W/(m·K) for austenitic stainless steel
Surface Finish	Fine-brushed, passivated or coated stainless housing with smooth ribbed bagging collar
Joint Type	Continuously welded duct housing with gasketed access door, ribbed bag collar and positive filter clamp
Customization	Available based on the intended application and operating environment.

Available Options

Gasket or gel-seal HEPA frameSingle or multiple filter stagesIsolation dampers and test portsStainless or coated carbon-steel construction

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