Troubleshooting Guide
No fluid flow
•
If valve operating air pressure is too low,
the valve will not open. Increase air
pressure to 70 psi (4.8 bar) minimum.
•
The reservoir air pressure may not be
high enough. Increase pressure.
•
The nozzle may be clogged. Clean
the nozzle.
•
The stroke adjustment control may
be closed. If it is closed, open coun-
terclockwise one turn.
•
The control and the atomizing air
lines may be reversed. Check for
proper connection.
Valve does not provide clean shut-off,
leaving a build-up on the nozzle
•
Atomizing air pressure may be too
low. Increase the air pressure.
•
Atomizing air delay setting may be too
low. Increase air delay setting.
Fluid continuously drips from the
nozzle after the valve shuts off
•
A continuous drip can be caused by
improper seating of the needle in the
nozzle seat. Remove the nozzle,
clean the needle and nozzle, and
replace worn or damaged parts.
•
If the fluid body has not been fully
turned onto the air cylinder body
during reassembly, the needle will not
seat in the nozzle. Check fluid body
installation.
•
Needle packings may be binding due
to leakage, preventing the needle
from fully closing. Disassemble the
valve and replace the packings if
there is evidence of leakage.
Fluid flows from the nozzle but will not
spray
•
Atomizing air pressure may be too
low. Increase air pressure.
•
If the fluid viscosity is too high, it will
not atomize. Reduce viscosity.
•
Check atomizing hose connection
“B” at the controller.
A NORDSON COMPANY
USA: 800-556-3484 or +1-401-434-1680
Europe: 0800 585733 or +44 (0) 1582 666334
Asia: +86 (21) 5854 2345
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www.efd-inc.com
©2006 Nordson Corporation 782-MAINT-01 v062606
