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Chapter 6: Maintaining Your Filtered Enclosure
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).
1. With the enclosure OFF, remove the front panel secured by
two screws on top of the enclosure.
2. Remove the bungee cords and retaining strap on the bag
and extend it out. The retaining strap provides an extra
level of safety even though the enclosure is under negative
pressure when the blower is on.
3. Loosen the two filter clamp bolts with a 9/16" socket
securing the HEPA filter. See Figure 4-1 and 4-2.
4. Place both arms in the rear gloves of the bag, and carefully
draw the HEPA filter out of the enclosure. Rest the HEPA
filter on the floor, table or cart. Remove arms from bag
gloves.
5. Create two seals between the enclosure bag access port and
the old HEPA filter. Seals can be heat sealed or sealed
with tie wraps. Cut off the bag between the two seals and
leave the bag stub on the access port to the enclosure.
6. Place the new HEPA filter in the new bag. Then place the
new bag and new HEPA filter over the old bag stub and
onto the enclosure access port.
7. Carefully remove the old bag stub using the single glove
near the access port. Reattach the retaining strap on the
perimeter of the new bag at the enclosure access port.
Draw the old bag stub into the single glove and turn the
glove inside out. Double seal this glove and cut off the
glove with the contaminated bag stub inside.
8. Carefully install the new HEPA filter and uniformly tighten
the two filter clamp bolts until the HEPA filter gasket is
compressed 50%.