An additional broad aspect relates to a valve having an actuating diaphragm that cooperates with {HEAD ~ a sealing diaphragm} to open and close {TAIL ~ the valve} 
to close
An additional broad aspect relates to a valve having an actuating diaphragm that cooperates with { HEAD ~ a sealing diaphragm } to open and close { TAIL ~ the valve }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL