P/N: 975389
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Rev: current
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ECO: xxxxx
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From lab to production,
providing a window into the process
-41-
6.3
Dump valve
CAUTION: Operating the dump valve involves being in close proximity to hot
surfaces and hot flowing plastic. Wear appropriate protection (goggles, face
shield, heat sleeves and gloves)
WARNING: The dump valve should only be actuated when the PIV and AUX
zones are at temperature. Operating the dump valve at lower temperatures
can damage the valve
•
The dump valve is used to purge possibly degraded material before it can enter the
RSU and possibly cause damage to the RSU
•
The dump valve is integrated into the flange that connects the PIV to the ext. tube
assy or supply tube
•
When not in use, the valve spool should be kept in the closed position (slot in the
valve spool parallel with the floor) and insulation in place around the dump valve
spool and exit
•
To operate the dump valve:
o
wait until the PIV and AUX zones reach operating temperature for at least 10
minutes before trying to operate the dump valve
o
remove the insulation covering the valve exit and spool
then without delay to
minimize heat loss in the dump valve:
o
Engage the spool with a 5/8” wrench from directly below the valve
