NPE-LF10 and NPE-HF10 Powder Spray Guns
9
Part 108191C
E
2003 Nordson Corporation
Operation
WARNING:
Allow only qualified personnel to perform the following tasks.
Follow the safety instructions in this document and all other related
documentation.
Electrostatic and air pressure controls are located on the front panel of the
electrostatic power unit. For complete operating instructions, refer to the
power unit manual.
Start Up
1. Turn on the system electrical power and booth exhaust fans. Open the
air supply valves.
2. Fill the powder-feed hopper
2
/
3
full with clean, dry powder.
3. Turn on the fluidizing air. Adjust the pressure to the recommended listed
in your hopper or power supply manual (typical pressure is 0.7
−
1.03 bar
(10
−
15 psi)). Allow time for the powder to become completely fluidized
before spraying.
4. Turn on the power unit. Adjust the air pressures as follows:
Air
Setting
Function
Atomizing
0.70 bar (10 psi)
Controls the density (powder-to-air
ratio) of the powder and adds to
the velocity. Keep this pressure as
low as possible, but maintain a
smooth flow of powder from the
spray gun.
Flow rate
2.75 bar (40 psi)
Controls the volume and velocity of
powder delivered to the spray gun
Cooling
0.70 bar (10 psi)
NOTE:
The pressures given above are typical for many applications, but
will vary according to desired film build, line speed, and part
configuration. Adjust them to obtain the desired results.
5. Turn the power-unit kV switch on and adjust it to 100 kV. Coat a part or
length of pipe and adjust the air pressures and kV to obtain the desired
results.
