Labconco Purifie Horizontal Clean Benches 3970424 - Manual (Page 10)

Chapter 2: Prerequisites
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6
Location and Air Current Requirements
Purifier Vertical Clean Benches have been designed to provide particulate-free
clean air meeting Class 5 conditions by negating typical cross drafts and
turbulence within the opening. However, as a precautionary safety measure and a
higher level of quality management, it is recommended that the clean bench be
placed in an area away from:

High traffic areas where walking might cause an air disturbance or be a
nuisance.

Overhead or wall HVAC diffusers, fans, radiators or other lab equipment
producing air currents.

Doorways or windows that may be opened.
Do not position the unit so that it is difficult to operate the main
disconnect device.
Ne placez pas l'appareil de sorte qu'il est difficile de faire
fonctionner le dispositif principal de déconnexion.
Airflow Specifications
Purifier Vertical Clean Benches use an integral motorized impeller to draw room
air from the top and through the enclosure. This room air is then pushed down
through the HEPA filter. The enclosure is factory set to deliver 40-55 fpm
downflow velocity measured 6" below the upper diffuser. The Class 5 HEPA-
filtered air flows across the work area and exits out the front of the enclosure.
Data for the outflow exhaust volume, downflow velocities and out-flow face
velocities are listed for each Vertical Clean Bench model below.
Enclosure
Width Model Description
Downflow
Velocity
(fpm)
Out-
Flow
Exhaust
Volume
(CFM)
Noise
Pressure
db(A)
Average
Outflow
Face
Velocity
(fpm)
2' 2' Vertical Clean Bench 30
40
50
60 120
165
210
250 53-57
58-60
60-61
62-63 85
115
145
170
3' 3' Vertical Clean Bench 30
40
50
60 180
250
310
370 58-60
60-62
62-66
66-70 85
115
145
170
4' 4' Vertical Clean Bench 30
40
50
60 240
330
420
500 58-62
60-64
62-66
66-70 85
115
145
170
!