The cleaning elements are intercepted and directed by the slanted bar screen to a tube cleaner return line for {HEAD ~ re injection} upstream of {TAIL ~ the heat exchanger} 
upstream of
The cleaning elements are intercepted and directed by the slanted bar screen to a tube cleaner return line for { HEAD ~ re injection } upstream of { TAIL ~ the heat exchanger }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL