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