Nordson Encore XL Powder, Manual

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© 2021 Nordson Corporation
1607027-01
2-10 Overview
Purge Manifolds
See Figure 2-7.
During a color change procedure, the purge manifolds blow powder out of the lances,
in-line pumps, powder feed hoses, and spray guns. When the operator activates the gun
purge mode during a color change procedure, the lance assemblies are lowered onto the
purge manifolds (7). The latch cylinder (3) is extended, causing the latches (5) to clamp
the lances to the purge manifolds. Compressed air is then pulsed through the lances,
in-line pumps, feed hoses, and spray guns, one manifold at a time. The purge sequence
is controlled by the feed center PLC. Air is supplied by the purge valves mounted on the
back of the feed center.
The latch assemblies can be adjusted to change the clamping force exerted on the
lance assemblies, depending on the purge air pressure. Refer to the
Repair
section for
adjustment procedures.
NOTE: Two and three lance systems will only have one purge clamp cylinder.
Clamping Cylinder Operation
Extend (Clamp): The air line to the regulator and extend flow control valve (4) at the
fixed end of the cylinder is pressurized with regulated air, forcing the cylinder piston and
rod out of the cylinder. The retract air line is vented.
Retract (Unclamp): The air line to the retract flow control valve (1) at the rod end of the
cylinder is pressurized with line air pressure, forcing the cylinder piston and rod into the
cylinder. The extend air line is vented.