In this manner, {HEAD ~ the valve} provides {TAIL ~ consistent flow control characteristics} in each flow direction 
provides
In this manner , { HEAD ~ the valve } provides { TAIL ~ consistent flow control characteristics } in each flow direction
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH