Burr King BK75 - Manual (Page 23)

Donaldson Company, Inc.
22
Attenuator
If an attenuator was ordered with the unit, the
mounting holes are pre-drilled.
To install an add-on attenuator:
1. Remove the top door assembly and set aside.
2. Place a piece of non-combustible cloth over the
filters in the clean-air chamber to protect them
from drilling chips.
3. Use a .213-in diameter drill bit to drill eight
holes in the collector top as shown.
4. Position the attenuator assembly, align holes,
and fasten securely using eight 1/4-20 thread-
cutting screws supplied.
5. Carefully remove the cloth protecting the
filters. Replace the top door assembly and
tighten securely by hand.
Attenuator Installation
6.81
A
.213
8x
Drill Location
Front View
attenuator
6.81
6.81
6.81
B
Model A B
Series 50 14.50 8.50
Series 60 and 70 14.50 8.63
Series 80 18.00 8.63
1/4-20 thread
cutting screw
8 required