Bio-Safety cabinet

 

Description

BSC:Bio-Safety cabinet

 

 
- This is a completely closed cabinet, isolate operating personnel or objects to
  avoid damage by harmful substances, protective role.
 
- It is often used in high-polluting, high toxicity, high hazard job.
 
- Exposure to toxic chemical biology, food testing, pharmaceutical and health
  hazardous industries ideal for devices.
 
- Customized size and specification are available to meet customer's
  requirements.
 
 
 
 
 
 
 
 

Features

Selection of a biological safety cabinet (BSC)

BSC category

Laboratory type

Type of protection

Class I

Groups 1–3, microorganisms in Risk;
Slightly volatile, radionuclide/chemical protection

Operator, environment

Class Ⅱ A1

Groups 1–3, microorganisms in Risk

Operator, environment, product

Class Ⅱ A2

Groups 1–3, microorganisms in Risk

Operator, environment, product

Class Ⅱ B1

Groups 1–3, microorganisms in Risk;
Slightly volatile radionuclide/chemical protection

Operator, environment, product

Class Ⅱ B2

Groups 1–3, microorganisms in Risk;
Minute amounts volatile, radionuclide/chemical protection

Operator, environment, product

Class III 

Groups 1–3, microorganisms in Risk;
Volatile, radionuclide/chemical protection

Operator, environment, product

The categories of Bio Safety Cabinet are defined and classified according to the National Sanitation Foundation Standard, NSF/ANSI 49.

 

◎ The Class I BSC is designed primarily for the protection of operating personnel

BSC grades

Inlet air velocity

% of air flow

Exhaust system

Applications

m/s

internal
re-circulated

Exhausted




Class I

0.38

0

100

External
(hard duct)

It is used for laboratories which are work with nonvolatile, radionuclide/chemical protection, microorganisms in Risk.

 

◎ The Class II BSC is designed not only to provide personnel protection but also to protect work surface materials from being contaminated by the room air which is drawn into the cabinet. And it is used for protecting the laboratory environment as well. It is acceptable for working with medium level risk tests. And according to the National Sanitation Foundation Standard, NSF/ANSI 49(2002), it can be defined and classified as 4 types. Their features are compared as below.

BSC grades

Inlet air velocity

% of air flow

Exhaust system

Applications

m/s

internal
re-circulated

Exhausted


Class II  A1

0.38

70

30

Internal or external
(Exhaust hood)

It is used for laboratories which are work with nonvolatile, radionuclide/chemical protection, microorganisms in Risk.


Class II  A2

0.5

70

30


Class II  B1

0.5

30

70

External
(Hard duct)

It is used for laboratories which are work with lightly volatile, radionuclide/chemical protection, microorganisms in Risk.


Class II  B2

0.5

0

100

 

◎ Class III biological safety cabinets are suitable for work in Bio-safety Level 3 and 4 laboratories and provide the protection for the highest hazardous level of the Risk Group 3, Risk Group 4, or above. It virtually is a sealed gas tight cabinet. Moreover, its supply air is HEPA- filtered and exhaust air passes through two HEPA filters which keep the cabinet interior under negative pressure consequently. The only way of accessing to the work surface for operation is by means of heavy duty rubber gloves, which are attached to ports in the cabinet virtually.

BSC grade

Inlet air velocity

% of air flow

Exhaust system

Applications

m/s

internal
re-circulated

Exhausted

Class III

N/A

0

100

Exhaust air should pass through two filters.

It is used for laboratories which are work with lightly volatile, toxic, radionuclide protection, microorganisms in Risk.