Thrush AHF Series - Manual (Page 14)

4.2 Operation (Continued)
Dirt Elimination:
The “Dirt Only” and “Air & Dirt” Aar-O-Vent models have extra space in the lower
section of the vessel for collection of dirt particles. Outlined below is the operational
information on the dirt elimination feature of the Aar-O-Vent. Use Figure 4-3 for
reference (“Air and Dirt” model shown).
 Dirt particles in the system water enter the Aar-O-Vent and collide with the
coalescing medium.
 The coalescing medium creates an area of less turbulence allowing the dirt
particles to fall out of the flow path and to the bottom of the vessel.
 Dirt particles will continue to collect at the bottom of the vessel until they are
flushed out through the blow down valve.
 Floating debris can be flushed out by opening the skim valve located on the top of
the vessel.
 Should the need to clean the coalescing medium arise, the removable head
provides ease of removal and cleaning.
Depending on the size of Aar-O-Vent, the head and bundle can be quite heavy. It is
recommended that supports be used when removing the head/bundle. Once all
bolts have been removed from the head, the head and bundle are free to drop.
Risk of severe personal injury and/or property damage may occur if the bundle
and head are not properly supported.
Thrush Co.
Manual #9636-1230