Nordson Encore XL Powder, Manual

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© 2021 Nordson Corporation
1607027-01
3-6 Installation
Reclaim and Virgin Powder Feed Options
Bulk feed systems are optional. Most systems will use at least one HDLV reclaim pump.
Dual reclaim systems are often specified for coating wire goods or for use with high gun
counts.
Figure 3-4 and Figure 3-5 illustrate typical connections and equipment required for
reclaim and virgin powder feed systems. Refer to your system drawings for additional
information and installation information.
Reclaim Powder Systems: The pump panel and HDLV transfer pump are mounted on
the cyclone stand. The purge valve is plumbed into an air drop and the shuttle valve is
mounted next to the purge valve. When the operator turns on the reclaim pump, air flows
from a solenoid-operated valve through 8-mm tubing to the pump operating air regulator.
6-mm tubing supplies regulated air to the transfer pan fluidizing air regulator and line
pressure to the manual purge pushbutton valve. This valve allows the operator to purge
the reclaim pump as needed.
During a color change cycle, the operator disconnects the reclaim transfer hose from
the sieve deck and connects it to one of the purge ports on the side of the sieve bracket.
The operator then turns the purge switch to the Pump Purge position. A signal from the
feed center opens a solenoid valve in the control manifold, sending pilot air to the reclaim
pump purge valve.
The valve opens and allows air at line pressure to flow through the pump and the 16-mm
suction and delivery powder tubing to clean them. The purged powder is dumped into the
feed center exhaust duct to the afterfilter.
Virgin Powder Feed System: A typical bulk feed system includes a HDLV transfer pump
and pump panel as well a process valve to control system operation. The process valve
is connected directly to the main air manifold on the feed center.
When a hopper is selected as the powder source and the lance level sensor tells the
system that the powder level is low, pilot air flows from the control manifold through
6-mm tubing to the process valve, which opens and supplies air at line pressure to
the virgin powder system and turns on the pump. Powder is pumped out of the bulk
powder container to the feed center hopper. The pump panel has regulators to control air
pressure to the pump and air pressure to an auxiliary function, such as a vibrator motor.
During a color change cycle, the operator disconnects the virgin transfer hose and
suction hose from the sieve deck and connects it to one of the purge ports on the side of
the sieve bracket. The operator then turns the purge switch to the Pump Purge position.
A signal from the feed center opens a solenoid valve in the control manifold, sending pilot
air through 6-mm tubing to the virgin pump purge valve. The valve opens and allows air
at line pressure to flow through the pump and the 16-mm suction and delivery powder
tubing to clean them. The purged powder is dumped into the feed center exhaust duct to
the afterfilter.