The improvement in a fluid valve 12, wherein said PTFE male and female rings are formed of {HEAD ~ carbon filled PTFE} and said V ring therebetween is formed of {TAIL ~ unfilled PTFE} 
The improvement in a fluid valve 12 , wherein said PTFE male and female rings are formed of { HEAD ~ carbon filled PTFE } and said V ring therebetween is formed of { TAIL ~ unfilled PTFE }
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 OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL