A diaphragm is biased into sealing engagement with {HEAD ~ the valve seat} to provide {TAIL ~ a fluid seal} between the ink inlet and the ink outlet 
A diaphragm is biased into sealing engagement with { HEAD ~ the valve seat } to provide { TAIL ~ a fluid seal } between the ink inlet and the ink outlet
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH