Installation, Operation and Maintenance manual
22
Downflo
®
Evolution
flat washer
lock washer
sealant
hex nut
bolt
flat washer
Figure 10: Field joining Detail C
8. Check that all joints and flanges are flush and tighten hardware starting with
the joint between the clean- and dirty-air plenums. Remove excess sealant.
Yoke, venturi and filter installation
Installing yokes requires two people.
1. From the clean air plenum (to access, remove the outlet cover, see Detail D in
Figure 10 - Yoke, venturi and filter installation), thread a hex jam nut and flat washer
to the shoulder of each of the three yoke rod ends. See Detail C.
2. Starting at the top access port work downward. Orient the yoke as shown in
Detail A and insert into the housing so the yoke is positioned in the appropriate
holes in the tube sheet. From the filter section, have one person hold the yoke
in position while another person installs a flat washer and hex nut on each yoke
rod end from the clean-air plenum. Do not tighten hardware at this time.
3. Adjust jam nut against the filter cartridge panel. Have one person hold the yoke
in position as shown in Detail B while another person tightens the three hex nuts
from the clean-air plenum. Repeat to install all yokes.
4. Apply sealant to venturi as shown in Detail E. Slide venturi over the yoke
with sealant end first. Hold venturi in place while installing venturi hardware
(thread forming screws and gasket washers) from the clean-air plenum.
5. Slide the filter cartridges into the collector on the yoke gasket-end first. Replace
access cover and tighten securely by hand following instructions found in
Maintenance Information. Repeat for all filter cartridges.
6. Replace the outlet cover on the bottom of the clean-air plenum shown in Detail D.
