Vacuum De-Gas - Graco PR70 Instructions - Parts Manual

Vacuum De-gas

This procedure is for assemblies with Vacuum Tree
Manifold and No Agitator or Auto-Refill. See F
1034
F . 7
IG
1. Models with ADM: To prevent machine movement,
press the Machine Disable Mode key (
Models with SDM: To prevent machine movement,
press the Red button
2. Close the shut-off ball valves at the base of the
tanks.
3. If the tank lid has a fill port, turn off any systems that
might refill the tank during the vacuum de-gas pro-
cedure.
4. Close the fill port ball valve (1034).
5. If the tank lid requires a desiccant dryer or nitrogen
pump installed, install one into the top ball valve of
the vacuum tree manifold (1015).
6. Close the top ball valve of the vacuum tree
manifold (1015).
7. Attach vacuum pump to the bottom ball valve of the
vacuum tree manifold (1015) then open the ball
valve.
8. Turn on the vacuum pump.
9. Continue to de-gas for sufficient time to de-gas the
material.
312394ZAC
. 7.
IG
1015
ti12560a
).
.
10. Close bottom ball valve of the vacuum tree
manifold (1015).
11. Turn off the vacuum pump.
12. Open the top ball valve of the vacuum tree
manifold (1015).
CAUTION
Operating the tank after the vacuum de-gas proce-
dure without the top ball valve open will result in pump
cavitation, off-ratio conditions, and possible collapse
of the tank.
13. Open the shutoff valves at the base of the tanks.
Setup
21