Bleed Valves; Operation - Graco Fluid Automation 633 Operation

Bleed Valves

Perform the procedure mechanically and if the dispense
head is plugged or there is no air to actuate the dis-
pense head solenoid.
Refer to the SR657-1M-LR Meter-Mix Dispense Sys-
tems, Operation manual for additional component call-
outs.
1. Press the stop button on the front of the machine.
2. Place a waste container below each Bleed Ball
Valve.
3. Open both Material Ball Valves.
In the following step, any pressure in the lines will be
instantly relieved if no obstructions are within the
lines. This may lead to material spraying out of the
valve and splashing in the bucket. Use appropriate
protective wear to prevent contact with materials.
4. Open the "A" Bleed Ball Valve. Residual pressure
will be relieved in the fluid lines between the pump
and the check valve.
5. Verify the analog pressure gauge reads 0 psi.
"A" Material
Pressure Gauge
6. Repeat for the "B" Pump Bleed Valve.
332078C
"B" Material
Pressure Gauge

Operation

Normal operation of the machine will take place in "Auto
Mode." The metering unit will wait for a "screw rotate
signal" from the press or factory automation to start dis-
pensing material.
Operation
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