Decontamination, Determination of when to replace hepa filters – Labconco XPert Filtered Balance Stations 3962622 User Manual
Page 40
Chapter 6: Maintaining Your Filtered Enclosure
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Decontamination
When used in conjunction with biohazards, the XPert Filtered Balance System and
XPert Filtered Balance Station should be decontaminated with formaldehyde gas before:
Maintenance work in contaminated areas
HEPA filter changes
Moving the cabinet to a new location
Changing research programs
After a gross spill of biohazardous material
The procedures for performing a gaseous decontamination are thoroughly outlined
in the U.S. Department of Health, Education and Welfare booklet entitled
Formaldehyde Decontamination of Laminar Flow Biological Safety Cabinets,
available from NIH, Division of Safety, Bethesda, MD 20892, call 301-496-2801,
or from Labconco Corporation.
Determination of When to Replace HEPA Filters
The HEPA filters in the filtered enclosures gradually accumulate airborne
particulate matter and powders from the enclosure and room. The rate of
accumulation will depend upon the cleanliness of the room air, the amount of time
the enclosure is operating, and the nature of work being done in the enclosure. In
typical installations and usage, the HEPA filters will last two to five years before
requiring replacement. Replace HEPA filters when face velocity drops below the
recommended 60-80 fpm velocity, and the speed control is adjusted to full speed.
Replace HEPA filters if it fails the HEPA Filter Leak Test in Chapter 6.
How to Install a New HEPA Filter with the Bag-In/
Bag-Out Procedure for XPert Filtered Balance
Systems and Stations
The XPert enclosures include a true bag-in/bag-out filter disposal system for safely
removing the HEPA filter and protect the worker from toxic powders and
particulates. See Figures 6-1 for the Bag-In/Bag-Out Procedure. For your safety,
wear appropriate personal protective equipment during the change of HEPA filters.
If working with biohazardous materials, use the decontamination procedure outlined
in Chapter 6. (Consult your Safety Officer before performing filter changes).
Do NOT contact blower wheel while still in motion.
NE PAS être en contact avec la roué du ventilateur tant qu’il est
en marche.
1. With the enclosure OFF, remove the front panel secured by two screws on
top of the enclosure.
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