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Donaldson Company, Inc.
1.
Mount the first hopper panel upside down on the tubesheet. In this step and subsequent steps, the tubesheet will be used as
a template to ensure correct alignment when joining subassemblies together. Align the outer bolt pattern of the hopper panel
with the corresponding pattern on the tubesheet. Do not apply sealant between the hopper panel and the tubesheet.
2. Temporary supports at the ends of each hopper panel may be required until the hopper ring is complete.
3.
Before connecting the adjacent hopper panel, apply sealant to the mating flange within 1/8-in of both flange edges as shown.
4.
Set the next panel and hand-tighten the hardware (connecting bolts should draw the adjoining flanges together but still allow
for some slippage). Repeat steps until upper hopper assembly is complete.
5.
If there is a middle hopper assembly, assemble it in the same way as the upper hopper assembly.
6.
After the hopper sections are assembled, apply sealant to the top of the upper flange as shown to prepare for the middle
hopper level assembly to be set.
7. Lower the middle hopper assembly onto the upper hopper assembly and hand tighten the hardware.
8.
Once the middle hopper is attached to the upper hopper, apply sealant and attach the lower hopper assembly and hand
tighten the hardware.
9.
Apply sealant, attach the hopper transition and hand tighten the hardware.
3. Hopper Assembly
Upper Hopper Assembly (Upside Down)
figure 8
sealant pattern
flange
edge
hopper mating
flange
Sealant Application
upper hopper panel
upper hopper
assembly
bolt hole
sealant
1/8-in
from
flange
edge
Note: number of hopper pieces will vary from size to size.
