Description
2-8
Part 1108061-02
E 2015 Nordson Corporation
After Filter Operation
See Figure 2-4.
Powder is conveyed through the intake duct (13) into the collector section,
where it collects on the external surfaces of the cartridge filters (6). The air
passes through the cartridge filters and flows into the pulse valve
compartment, through the fan (2) and final filters (1) back into the spray
room.
The pulse valves (3) periodically release large volumes of compressed air
into the centers of the cartridge filters, blowing the accumulated powder off
the filters.
The powder falls into the waste hopper (8) in the bottom of the collector
section. The waste hopper is equipped with a fluidizing plate (9), which
diffuses air into the powder so that it can be pumped to a waste container
(11).
The final filter differential pressure switch (15) monitors the pressure drop
across the final filters. At 2.5-in. wc, a red warning light on the system
control panel lights. At 3-in. wc, the entire system shuts down.
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