Labconco Axiom C1, User Manual, Page: 14 / 86

14
The exhaust system must be capable of moving the following volumes of exhaust air at
the negative pressures listed. The
Airflow Volumes are the values recorded via direct
measurement using a flow hood at the front opening of the cabinet. The Concurrent
Balance Values are measured in the exhaust duct via traverse methodology, and will
always be higher due to differences in volume measurement methodologies.
1: Unlike Type B biosafety cabinets, the recommended vacuum will remain constant throughout the life of
the exhaust HEPA filter. Duct vacuums below 0.2 inches H
2
O (50 Pa) or above 0.5 inches H
2
O (125 Pa)
may result in erratic operation and throw an alarm condition from the product.
2: WC = Inches of Water Column, typically expressed in units of inches H
2
O .
Air-Tight Damper
Axiom Type C1 Model
Airflow Volume
Concurrent
Balance Value
Recommended
Duct Vacuum
1
ft
3
/min m
3
/hr ft
3
/min m
3
/hr WC
2
Pa
4-foot, 8" Sash 323 549 387 658 0.30 75
4-foot, 10" Sash 400 680 480 816 0.30 75
6-foot, 8" Sash 463 787 556 945 0.30 75
6-foot, 10" Sash 570 968 684 1162 0.30 75
Values are Nominal Inflow (105 fpm) + 50 cfm through Canopy Inlet Relief Valve. CBV = ~ 20% higher
Table 2-1
AIR-TIGHT DAMPER
DUCT COLLAR
BUILDING EXHAUST DUCT
(NOT INCLUDED)
AIRFLOW
ADJUSTMENT
HANDLE
BIOSAFETY CABINET
DUCT STUB
Figure 2-6
Visual appearance of biosafety cabinet and exhaust connection may vary by model.