The present invention relates to valve system ports, and particularly to those ports used in {TAIL ~ refrigeration systems} for charging and evacuating {HEAD ~ the refrigerant system} with refrigerant 
The present invention relates to valve system ports , and particularly to those ports used in { TAIL ~ refrigeration systems } for charging and evacuating { HEAD ~ the refrigerant system } with refrigerant
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH