6–2 Series 3080 Electrostatic Classifiers
Cleaning the Impactor
The impactor’s function is to remove particles above a certain cut
size. Over time, particle loading on the impaction plate influences
the pressure drop across the nozzle and, therefore, particle
measurements due to particle re-entrainment. Follow the steps
below for cleaning of impactor inlet.
1. Remove tubing connected to the pressure tap connectors from
the impactor and then refer to Figure 6-1.
2. Remove the impactor screw by hand by gripping the knurled
surface and unscrewing.
3. Clean the impaction surface with a soft cloth soaked with
alcohol.
Figure 6-1
Cleaning the Impactor
4. Apply a very small amount of vacuum grease to the impaction
surface. Apply grease sparingly, since this will alter the
pressure drop across the nozzle.
5. Examine the nozzle orifice under a microscope or powerful
magnifying glass. If the nozzle needs to be cleaned, squirt
alcohol through the nozzle hole until clean. Repeat this for all
nozzles.
6. Reassemble the impactor making sure that the gasket washer is
properly in place between the impactor nozzle and body.
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