Troubleshooting
Problem
Possible Cause
Corrective Action
Valve does not cycle
Air pressure to air section is too low
Stroke adjustment bolt is bottomed out
Material has cured in the valve
Valve was assembled w/o lubricating the O-
ring seals
Increase air pressure to between 60-100 psi
Back out stroke adjustment bolt by turning it
counter-clockwise
Disassemble and clean valve
Disassemble valve, lubricate seals and re-
assemble
Material leaks from
valve tip
Diaphragm is worn
Air bubble trapped in fluid body or in
dispense needle
Replace diaphragm
Flip valve upside down and cycle until air bubbles
are removed
Valve leaks from
mid-section
Diaphragm is worn or damaged
Replace diaphragm
Valve does not
dispense anything
Fluid pressure is too low
Material has cured in fluid section
Stroke adjustment bolt is set too low
Increase fluid pressure
Disassemble and clean valve
Back out stroke adjustment bolt 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
Diagnose and repair.
Dispense rate too fast
Fluid pressure set too high
Stroke adjust set too high
Dispense tip gauge too large
Decrease fluid pressure
Turn stroke adjust clockwise
Replace dispense tip with smaller size
Dispense rate too
slow
Fluid pressure set too low
Stroke adjust set too low
Dispense tip gauge too small
Increase fluid pressure
Turn stroke adjust counter-clockwise
Replace dispense tip with larger size
