The system includes a three position actuator for moving {HEAD ~ a valve pin} into a closed position in which neither skin nor core flow is permitted, a middle position in which only skin flow is permitted, and {TAIL ~ an open position} in which skin and core flow is permitted 
The system includes a three position actuator for moving { HEAD ~ a valve pin } into a closed position in which neither skin nor core flow is permitted , a middle position in which only skin flow is permitted , and { TAIL ~ an open position } in which skin and core flow is permitted
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH