The valve 120 can also include other features such as an o ring 148 disposed around a portion of the flow control member 128, 129 for enabling movement of {HEAD ~ the flow control member} 128, 129 between {TAIL ~ the open and closed positions} 
The valve 120 can also include other features such as an o ring 148 disposed around a portion of the flow control member 128 , 129 for enabling movement of { HEAD ~ the flow control member } 128 , 129 between { TAIL ~ the open and closed positions }
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 HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL