Laminar Flow and Containment Equipment

Class II Type B2 Biological Safety Cabinet

A total-exhaust Class II cabinet that sends all work-zone air through a dedicated building exhaust connection without recirculating it inside the cabinet.

100 Percent Total Exhaust
Hard-Duct Building Connection
HEPA-Filtered Supply Downflow
Exhaust Interlock Monitoring

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Product Introduction

The Type B2 cabinet combines inward face airflow with filtered vertical downflow, then sends the entire cabinet air volume to a dedicated building exhaust system. No work-zone air is recirculated within the cabinet. The supply blower and facility exhaust must remain balanced, and an exhaust-loss interlock warns or stops cabinet operation if the external system fails. The configuration can support biological work involving limited evaluated volatile chemicals when the complete installation and procedure are suitable.

Key Features

All work-zone air leaves through the hard-ducted exhaust connection.

A dedicated supply HEPA stage provides clean vertical air over the product.

Exhaust-loss monitoring protects the inward containment boundary.

Negative-pressure plenums enclose contaminated internal air paths.

A serviceable exhaust transition coordinates the cabinet with building ductwork.

Customer Product Concerns

A B2 cabinet depends on the building exhaust system, so cabinet airflow, room balance and duct performance must operate together.

Exhaust failure reverses or weakens face containment.An exhaust interlock alarms and can disable the cabinet supply when duct flow is lost.

Building airflow changes disturb cabinet balance.A coordinated exhaust valve and pressure sensing stabilize the cabinet connection.

Heat and conditioned air are continuously exhausted.Efficient EC blowers and correctly sized duct control reduce avoidable energy demand.

Users assume any chemical quantity is acceptable.The application is limited to substances and quantities evaluated for the complete exhaust installation.

Typical Applications

Biological work with evaluated volatile chemical useToxicological studiesPharmaceutical microbiology requiring total exhaustSpecialized clinical laboratory procedures

Technical Parameters

Typical configurable construction ranges for a Class II Type B2 biological safety cabinet are listed below.

Core Material	SUS316L work-zone liner with powder-coated steel outer shell and mineral-wool insulated supply and exhaust plenums
Panel Thickness	40-75 mm double-skin supply and exhaust sections
Effective Width	1200-1800 mm clear working width
Maximum Length	Up to 2600 mm overall cabinet height including exhaust transition
Steel Facing Thickness	1.2-1.5 mm SUS316L inner liner; 1.0-1.2 mm outer steel
Core Density	100-140 kg/m³ mineral-wool plenum insulation
Thermal Conductivity	0.035-0.045 W/(m·K) for the mineral-wool insulation
Surface Finish	Fine-brushed SUS316L work zone with sealed white powder-coated exterior
Joint Type	Welded negative-pressure inner plenums with gasketed HEPA frames and flanged hard-duct exhaust transition
Customization	Available based on the intended application and operating environment.

Available Options

1200 or 1800 mm work widthMotorized sashBuilding exhaust control valveSUS304 or SUS316L work zone

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