The laminar flow pass box is a kind of auxiliary equipment for cleanrooms, mainly used for the transfer of small  items between two clean areas or between clean area and non-clean area, to reduce the number of cleanroom door  opening times and minimize the pollution of cleanroom. UV lamps are installed in the pass box to disinfect the items  before passing them to the clean area. On the one hand, it plays the role of airlock to prevent the high pressure from  being leaked in the high-class cleanroom; and on the other hand, it realizes the self-cleaning effect during the transfer process to ensure the cleanliness of the items entering the clean area and reduce the cross-contamination  brought by the items.

Description:

1. Differential pressure gauge  2. Centralized control panel   3. Double-layer tempered glass door  4. Stainless steel meniscus handle  5. DOP test port  6. Centrifugal fan  7. PAO injection port  8. Gel seal HEPA filter  9. UV sterilizer  10. Return air mesh plate

Basic performance requirements:

◎ Cleanliness requirements inside the laminar flow pass box: Class A;

◎ Adopts inner and outer housing design, with rounded treatment around the 

inside to ensure gap-free connection;

◎ Adopts laminar flow design, with the airflow direction of upward supply and 

downward return mode, and 304# stainless steel cold-rolled plate punching 

design at the bottom, combined with reinforcing ribs;

◎ Filter: G4 for the primary-efficiency filter and H14 for the HEPA filter;

◎ Air speed: After passing the HEPA filter, the air speed is controlled at 

0.36-0.54 m/s (tested at 150 mm below the flow equalizing plate at the high-efficiency air outlet);

◎ Differential pressure function: Display filter differential pressure (ranging 

0-500Pa for HEPA), with the accuracy of ±5Pa;

◎ Control function: Equipped with fan start/stop button and built-in electronic 

door interlock; set UV lamp, designed to switch separately;

◎ An access port is equipped in the lower part of the pass box for the maintenance of the fan;

◎ Noise: Noise <65db during normal operation of the pass box;

◎ Flow equalizing plate at high-efficiency air outlet: 304# stainless steel mesh 

plate is used.

Main technical parameters:

Note: The specifications listed in the table are for customers' reference only, and the laminar flow pass box can be designed and  made according to customers' requirements.