7
Operation
Refer to assembly drawings 112-5826_2 and Figure: 3 for part reference numbers.
Air Section
•
Plumb up the valve as outlined above in the Setup procedure.
•
Regulate the air pressure operating the valve between 60-100psi.
•
Making sure that the valve is not aimed toward anyone, cycle the valve several times.
Note: When the valve is cycling, the piston should be heard hitting the micrometer adjustment (10), and
the needle (1) should be seen going up and down in the center.
If the valve is not cycling properly, refer to the Troubleshooting section.
Fluid Section
•
When the fluid delivery system is connected to the valve, pressurize the material to be dispensed
at 10 psi.
•
To bleed the fluid section, use a 3/32" Hex key to loosen the set screw (19) of the bleed port
located on the fluid section (7), being careful not to fully remove the screw.
Note: If fluid does not flow out of the bleed port, slowly increase material pressure until fluid and air
bubbles are seen.
Note: Do not exceed 20psi for purging.
•
Once material begins to flow steadily and all air bubbles have been bled, tighten the set screw (19)
and wipe the valve clean.
•
Open the stroke on the valve to full by turning the micrometer adjustment (10) counter clockwise
until it reaches its furthest point, about #3 on the dial (D).
•
If possible turn the valve vertical so the dispense tip is pointing up in the air. Note: Hold a cloth
over the dispense tip to catch fluid flow from the tip.
•
Cycle the valve several times until material begins to dispense from the nozzle. Continue to cycle
the valve until all air bubbles cease to dispense from the tip and a steady flow of material can be
seen with each shot.
Note: If material is dispensing properly, Skip the Additional Bleeding section
Additional Bleeding
Entrapped air inside the fluid section and outlet check valve housing of this metering valve will greatly
reduce the repeatability of the dispense volumes or even prevent the valve from fully priming. Air bubbles
trapped in this chamber will compress thus altering the amount of fluid that can pass the outlet check valve
and dispense.
For additional bleeding, follow these steps:
•
Remove fluid pressure from the valve.
•
Apply air pressure to the air section of the valve to set the cylinder the in refill position, so the
needle (1) is retracted from the seat (9).
