6
4. Installation (continued)
Note:
This installation uses luer lock adapters shipped with the valve. Any approved material line
with 1/8" N.P.T. connections will work.
Refer to Figure 4.
1. If desired, mount the valve to the bracket (1) option.
2. Connect syringe to product inlet port (2) or connect material feedline to inlet port (2).
3. Connect valve actuating airline to air inlet port (3) and to an approved valve controller.
4. Pressurize material reservoir (Material pressure not to exceed 100 psi).
5. Activate the valve until all air has been purged from material line. It may be helpful to turn
the valve upside down to purge air. Attach desired dispense tip (4) to the outlet
luer lock adapter.
6. Secure the dispense tip with the valve needle retaining cap (5).
4.2 Adjusting Dispense Quantity
Shot size is dependent on the following factors:
1. Flow control adjustment - Turn end cap counterclockwise to increase material flow rate.
2. Length of actuation, set at controller (valve open time).
3. Material supply pressure at reservoir.
4. Material viscosity.
5. Dispense tip size.
4.3 Shutdown
The valve does not need any special care for shut down periods of up to two weeks. If the valve is
not going to be used for more than two weeks, cleaning the system out with Loctite
®
Equipment
Flushing Solvent P/N 12121 is recommened.
5. Maintenance and Cleaning
The Micro Needle Valve is designed to dispense UV curing adhesives. Precautions have been
made to protect the adhesive within the valve from exposure to UV light. Over time, curing may
occur within the dispense tip and around the needle and luer assembly. Removing the luer
adapter will force most of the cured adhesive off the needle.
5.1 Procedure for Replacing Luer Adapter
Warning!
Disconnect all material and air pressure lines before performing any maintenance on
this valve.
Disassembly
, Refer to Figure 5.
1. Relieve reservoir product pressure
2. Remove needle retaining cap (2)
3. Remove dispense tip
4. Use a 7/16" wrench to remove luer adapter (3) and o-ring (5).
5. Examine valve needle rod (4) and clean off all cured material with Loctite
®
Equipment Flushing
Solvent P/N 12121.
6. Replace luer adapter (3) and o-ring (5) or clean luer adapter with Loctite
®
Equipment
Flushing Solvent P/N 12121.
7. Clean valve body (1) with Loctite
®
Equipment Flushing Solvent P/N 12121.
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