Loctite Dispense Valve 97114 User Manual
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5. Dispensing
5.1 Priming the Dispensing Valve
To avoid air bubbles during dispensing, the product line must be filled and then purged of air. The
dispensing valve must be very carefully purged of air to achieve error-free dispensing.
dispensing valve must be very carefully purged of air to achieve error-free dispensing.
• To fill the product line, hold the dispensing valve slanted upward so that no air will be trapped
inside the valve chamber.
• Slide the silicone tubing provided over the dispensing needle.
• Bend the silicone tubing downward to avoid uncontrolled
squirting of the product.
• Place a container under the dispensing valve since the product
will flow out.
• Perform the filling of the product feedline according to the operating
instructions of the various Controllers.
5.2 Adjusting the Dispensed Quantity
Before the dispensing quantity is adjusted, the stroke of the shutoff piston should be adjusted on
the Dispensing Valve. With the changing of the piston stroke, the dispensed quantity is also
changed for the same dispensing pressure.
the Dispensing Valve. With the changing of the piston stroke, the dispensed quantity is also
changed for the same dispensing pressure.
The opening and closing speed of the dispensing valve can be changed with the air outlet chokes.
With the changing of the opening and closing speed for the dispensing valve, the dispensed
quantity is also changed.
With the changing of the opening and closing speed for the dispensing valve, the dispensed
quantity is also changed.
5.2.1 Adjusting the Suck-Back Effect (Piston Stroke)
The piston stroke should be adjusted so that the product no longer drips out of the
dispensing needle.
dispensing needle.
The product must not be sucked back too far since, when using cyanoacrylates, curing can
occur in the needle and valve and cause malfunction.
occur in the needle and valve and cause malfunction.
• Initiate a time-controlled dispensing start (approx.
0.50 sec. long). When necessary, change the
piston stroke with the adjustment knob 10:
piston stroke with the adjustment knob 10:
Product drips:
– Turn the adjustment knob in the + direction.
The piston stroke (suck-back effect) is increased.
Product dispensing is delayed after a start:
– Turn the adjustment knob in the – direction.
• Perform the adjustment of the dispensed quantity according to the operating instructions of the
various Controllers.
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