The valve member substantially prevents fluid from flowing: from the third port to the first port; from the second port to the first port; from {HEAD ~ the third port} to {TAIL ~ the second port}; and directly from the first port to the third port 
The valve member substantially prevents fluid from flowing : from the third port to the first port ; from the second port to the first port ; from { HEAD ~ the third port } to { TAIL ~ the second port } ; and directly from the first port to the third port
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 OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH