PVA B12-1788, Руководство по эксплуатации, Страница: 11 / 12

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 w/o
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
- Needle and/or seat are worn
- Air bubble trapped in fluid body or
in dispense needle - Loosen packing nut
- Replace parts as necessary
- Flip valve upside down and cycle
until air bubbles are removed
Valve leaks from
mid-section - Packing nut is loose
- Packing is worn - Tighten packing nut until snug
- Replace packing
Valve does not
dispense
anything - Fluid pressure is too low
- Material cured in fluid section
- Micrometer adjustment bolt is set
too close to zero - Increase fluid pressure
- Disassemble valve and clean
- 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
- Diagnose and repair.
Dispense rate too
fast - Micrometer Adjustment set out too
far - Turn micrometer adjustment bolt
clockwise toward the zero mark
Dispense rate too
slow - Micrometer Adjustment bolt set
too close to the zero mark - Turn micrometer adjustment bolt
counter-clockwise
Fluid does not
dispense straight
from the nozzle - Fluid pressure too low
- Material cured on nozzle tip - Increase fluid pressure until fluid
dispenses vertically
- Clean tip with cloth or solvent