17
Troubleshooting
Problem
Possible Cause
Corrective Action
Valve does not
cycle
Air pressure to air section too low
Packing nut is too tight
Micrometer adjustment is bottomed out
Material is cured in the valve
Valve was assembled without lubricating
the O-ring seals
Increase air pressure to 60-100 psi
Loosen packing nut until valve just begins to
cycle, retighten
Back out micrometer adjustment by turning it
counter-clockwise
Disassemble and clean valve
Disassemble valve, lubricate seals and re-
assemble
Material leaks from
valve tip
Packing nut is too tight
Air bubble trapped in fluid body, needle
adapter, or dispense needle
Check valve is worn
Loosen packing nut
Flip valve upside down and cycle until air
bubbles are removed, or loosen set screw on
fluid body to bleed air
Replace parts as necessary
Valve leaks from
mid-section
Packing nut is loose
Packing is worn
O-Ring is worn
Tighten packing nut until snug
Replace packing
Replace o-Ring
Valve does not
dispense anything
Air trapped in fluid body, needle adapter,
or dispense needle
Valve is not cycling
Fluid pressure is too low
Material cured in fluid section
Micrometer adjustment set too low
Flip valve upside down and cycle until air
bubbles are removed, or loosen set screw on
fluid body to bleed air
See above
Increase fluid pressure
Disassemble and clean valve
Back out micrometer adjustment by turning it
counter-clockwise
Air bubbles in fluid
Valve not properly purged
Problem with fluid delivery system
Flip valve upside down and cycle until air
bubbles are removed, or loosen set screw on
fluid body to bleed air
Diagnose and repair.
Inconsistent shot
sizes
Improper material viscosity
Air trapped in material being dispensed
No solution
Flip valve upside down and cycle until air
bubbles are removed, or loosen set screw on
fluid body to bleed air
