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 open
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 REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL