Nordson EFD Optimum Ceramic MicroDot 7364054 User manual

Cleaning Optimum Ceramic MicroDot Tips
Instructions
Introduction
To precisely dispense accurate, small amounts of fluid, the Optimum®Ceramic MicroDot™tip has an
extremely small opening. This opening can become clogged or blocked by very small contaminants which
can adversely affect dispensing results.
Tip contamination, particularly in the fluid flow path, is manifested by the following symptoms:
• Poor dispensing
• No fluid flow, caused by clogging of the nozzle orifice
Recommended Cleaning Schedule / Cycles
Cleaning and maintenance intervals vary depending on operating conditions. Testing has shown that MicroDot ceramic tips
can survive 10 cleaning cycles without loss of performance.
Cleaning Tools
• Valve disassembly / reassembly tools (refer to the valve manual)
• Tweezers
• Acetone
• Compressed air supply
• Ultrasonic cleaner
Three Steps for Cleaning MicroDot Tips
(1) Clean the Fluid Path by Purging the Tip
If the tip is not clogged, purge the tip with a cleaning fluid or solvent that is compatible with your dispensing fluid. Purging
can be performed with the tip assembled on the valve or manually if the tip has been disassembled from the valve.
NOTES:
• Refer to the valve manual for disassembly and reassembly procedures.
• The MicroDot tip can withstand repeated purging cycles with acetone. Before using acetone, refer to the Technical Data
Sheet (TDS) or Safety Data Sheet (SDS) for your dispensing fluid to ensure that it is compatible with acetone.
Continued on next page

Cleaning Optimum Ceramic MicroDot Tips | Instructions
For Nordson EFD sales and service in over
40 countries, contact Nordson EFD or go to
www.nordsonefd.com.
Global
800-556-3484; [phone]
[email protected]
Europe
00800 7001 7001
[email protected]
Asia
China: [phone]; [email protected]
India: [phone]; [email protected]
Japan: [phone]; [email protected]
Korea: [phone]; [email protected]
SEAsia: [phone]; [email protected]
The Wave Design is a trademark of Nordson Corporation.
©2021 Nordson Corporation 7365553 v032421
(2) Remove Clogging by Cleaning the
Tip in an Ultrasonic Bath
1. If you have not already done so, carefully disassemble the
MicroDot tip from the valve.
2. Use tweezers to carefully place the MicroDot tip in a
container of acetone. Allow the tip to soak for several
hours, or overnight. Use tweezers to remove the tip from
the acetone.
3. Use compressed air to blow the acetone from the front of
the tip (the ceramic side) toward the hub.
4. Place the tip in an ultrasonic cleaner and clean for
approximately 60 minutes. Refer to the ultrasonic cleaner
instructions as needed.
(3) Clean with Air
Do not use cleaning tools, sharp items, or brushes to clean the
inner part of the tip; doing so can damage the surface of the
fluid flow path.
CAUTION
1. Use compressed air to clean lint or residue from the fluid
paths by forcing air from the front of the tip (the ceramic
side) towards the hub.
2. Check the cleanliness with a magnifying loupe, if available,
or with a microscope that has a backlight. If no light is
visible through the ceramic tip, then the tip is still clogged.
NOTES:
• For proper operation, the fluid path must be free of lint,
particles, residues from dried fluid, or other contaminants.
• Ultrasonic cleaning time can be shorter depending on the
fluid type, especially for watery materials or thin fluids of
less than 1,000cps. Most other fluids will require a longer
cleaning time. Sometimes multiple cycles of ultrasonic
cleaning along with compressed-air cleaning are required to
fully disperse cured material.
Three Steps for Cleaning MicroDot Tips (continued)
Ceramic tip Hub
Correct direction to blow compressed air