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Clean bench operating and maintenance

Clean bench operating and maintenance

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By creating a high level clean area through high-efficiency air cleaning unit. It is normally used in low level clean room to partially improve working environment, it saves initial investment and operating expense.

Clean bench operating and maintenance in the right way.

 I.Operating methods

1、Proper operating methods and maintenance is the key factor, make rules and regulations for tools, materials and visitors. 

2、Startup& Shutdown:

a、Switch on the fan 5-10 minutes in advance to reach clean operating condition.

b、Switch on lighting system.

c、Switch off fan and lighting system after work.

3、 Keep clean of the whole device and start clean bench 5-10 minutes in advance, requirements are as follows:

a、Personnel must wear washable long-fiber gowning and cap. 

b、Only non-particle generating pen and tracing paper is allowed for writing.

c、Mask must be used if hazardous materials and medication, steam disinfection is prohibited. 

d、Particle generating movements like scratching head and running are prohibited during operation.

e、Normally items are not allowed to put on the surface of clean bench, put on surface side area or leeward area if necessary.

f、Operator’s head and hands should be behind of products, otherwise rubber gloves and finger-cots are necessary.

g、Components, materials and tools must be transported in clean containers.

II. Maintenance

1、 After working for some time(Primary filter 3-6 months, HEPA filter 1-2 years or longer), airflow velocity in operating area will lower down with increasing of dust, when airflow velocity is lower than 0.3 m/s(Regulating voltage cannot reach requirement or causes vibration and noise), replace primary filter. 

2、 After working for some time(Primary filter 3-6 months, HEPA filter 1-2 years or longer), airflow velocity in operating area will lower down with increasing of dust, when airflow velocity is lower than 0.3 m/s(Regulating voltage cannot reach requirement or causes vibration and noise), replace primary filter. 

3、Check new HEPA filter before replacement to ensure there is no damage and be able to work properly. 

4、Affix sticker sponge(width 15mm, thickness 8mm) to HEPA filter external frame at air outlet side to prevent non-filtered air leakage. 

5、HEPA filter replacement must be done as follows:

a、Arrow direction on HEPA filter frame and airflow direction must be same. 

b、Make sure equal pressure for filter frame and sealing frame when locking nut, in case of leakage.

c、Cautious operation to avoid filtration paper damage.

6、 Cover air diffuser on top and check after installation.

a、Infiltration inspection: Ignite spearmint at air inlet and turn on fan. Scan with turbimeter or particle counter at air outlet area, if infiltration, check and repair with sealant. 

b、Aiflow velocity inspection: Measure air velocity at different air spots.

7、Check fan control circuit or contact with supplier if lighting and motor breakdown.