User Guide

Troubleshooting Guide
Fluid flows from the nozzle but
will not spray
• Nozzle air pressure may be too
low. Increase air pressure.
• The air passageway between the
nozzle and air cyclinder cap may be
obstructed.
Remove the air cyclinder
cap, and clean the air cyclinder
cap and nozzle.
• If the fluid viscosity is too high, it
will not atomize. Reduce viscosity.
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 may be
closed. Open stroke adjustment.
• The control and nozzle air lines
may be reversed. Check for
proper connection.
Valve does not provide clean
shut-off, leaving build-up on
the nozzle
• The needle may be improperly
seated in the nozzle seat. Remove
the nozzle, clean the needle and
nozzle, replace worn or damaged
parts.
• Needle packings may be binding
due to leakage, preventing the nee-
dle from fully closing. Disassemble
the valve and replace the packings
if there is evidence of leakage.
A NORDSON COMPANY
USA: 800-556-3484 or [phone]
Europe: 0800 585733 or [phone]
Asia: [phone]
[e-mail] www.efd-inc.com
©2006 Nordson Corporation 781S-MAINT-01 v062606