Air Filters and Chemical Filtration

Bag-In/Bag-Out HEPA Filter Housing

A welded side-access housing that uses a continuous PVC change bag to isolate service personnel from a contaminated HEPA or molecular filter.

Contained Filter Change
Continuous Bagging Collar
Positive Filter Clamping
Welded Stainless Housing

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Product Introduction

The BIBO housing encloses each filter behind a sealed service door and an external bagging ring. Before the door is opened, a transparent change bag is attached to the collar so the used element can be released, enclosed and removed without direct contact with the dirty plenum. An internal clamping mechanism compresses a gasket-seal or gel-seal filter uniformly against its sealing surface. Fully welded stainless construction and flanged duct connections form a durable containment section for hazardous exhaust systems.

Key Features

A dedicated bagging collar retains the change bag throughout removal and replacement.

Independent filter clamps apply controlled pressure around the complete sealing perimeter.

A removable door gasket isolates the service opening during normal operation.

Modular one- and multi-wide sections support particulate and molecular filter stages.

Customer Product Concerns

Filter replacement in contaminated exhaust can expose technicians and release captured material unless the service opening remains enclosed.

Opening a conventional access door exposes the loaded filter face.The attached change bag forms a flexible barrier around the filter during removal.

A filter is installed unevenly and leaks at one corner.A guided clamping system applies uniform compression across the gasket or gel interface.

The bag slips from the collar while the old element is being handled.Raised bagging rings, security straps and cinching bands retain the barrier at the service port.

Multiple stages require separate, poorly sealed field enclosures.Welded modular housings can combine prefilter, HEPA and molecular stages in one flanged train.

Typical Applications

Biosafety laboratory exhaustPharmaceutical containment suitesHospital isolation exhaustHazardous chemical ventilationRadioisotope handling facilities

Technical Parameters

Representative construction ranges for a modular BIBO filter housing are listed below.

Core Material	Fully welded 304 or 316 stainless-steel housing with internal stainless filter clamping hardware
Panel Thickness	1.5–3.0 mm welded housing panels
Effective Width	305–1830 mm for one- to three-filter-wide modules
Maximum Length	Up to 2440 mm per multi-stage housing train
Steel Facing Thickness	1.5–3.0 mm 304 or 316 stainless-steel casing and doors
Core Density	Approximately 8000 kg/m³ for 304 stainless-steel housing components
Thermal Conductivity	Approximately 15 W/(m·K) at room temperature for the welded 304 stainless enclosure
Surface Finish	Continuous welded, cleaned and brushed stainless-steel finish
Joint Type	Flanged duct joints, gasketed access door and PVC bagging collar with contained clamp mechanism
Customization	Available based on the intended application and operating environment.

Available Options

Gasket-seal or gel-seal filtersOne- or multi-stage constructionBubble-tight isolation dampersTest ports and injection sections

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