control means on the opposite side of said diaphragm from said closure valve, having a head bearing against said diaphragm, for acting through said diaphragm to move said {HEAD ~ closure valve} toward and away from {TAIL ~ closure} 
away from
control means on the opposite side of said diaphragm from said closure valve , having a head bearing against said diaphragm , for acting through said diaphragm to move said { HEAD ~ closure valve } toward and away from { TAIL ~ closure }
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 OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL