StediFlo
t
57:1 Pump
17
Part 1601882-01
E
2012 Nordson Corporation
Corrective Action
Possible Cause
Problem
6. Pump does not stroke
when circulation valve
is opened
Clogged circulation valve, or
blockage in system
Open the circulation valve fully, then
close it partially. If the problem
continues, flush the system with a
compatible cleaning solution. Refer
to problem 1.
No compressed air supply, or air
pressure is too low
Check the air supply at the drop-leg
drain valve. Make sure the regulator
is working correctly.
7. Solvent chamber
overflows often
Upper packings worn
Replace the packings.
8. Fading or narrowing of
the spray pattern
Compressed air pressure is too
low
Make sure the air pressure regulator
is working correctly. The pump air
motor requires at least 1.38 bar (20
psi) air pressure to operate. Increase
the air pressure. Check for a
restriction in the air supply line.
Blockage in hydraulic system
Refer to problem 1.
Nozzles or fluid tips too large, or
too many spray guns connected to
system
Reduce the nozzle or fluid tip size, or
the number of spray guns connected
to the pump.
Spray gun nozzle plugging
Remove the filter screen and inspect
it. If the screen is damaged, replace
it. If the screen is undamaged,
replace it with one with a smaller
mesh size.
9. Spray pattern has
tails of unatomized
coating material at the
outer edges
Low hydraulic pressure or partial
blockage in system
Increase the air pressure. Flush the
system with a compatible cleaning
solution. Refer to problem 1.
Material too viscous
Add solvent to the coating material to
lower the viscosity.
Damaged nozzle or fluid tip
Replace the nozzle or fluid tip.