whereby control of the fluid communication is effected by {TAIL ~ a resilient, non perforated diaphragm} having a seat engaging side and a seat engaging side first surface area, the diaphragm adapted to float within the valve chamber and to inter engage the valve seat to selectably block fluid flow through {HEAD ~ the valve seat gas port} 
whereby control of the fluid communication is effected by { TAIL ~ a resilient , non perforated diaphragm } having a seat engaging side and a seat engaging side first surface area , the diaphragm adapted to float within the valve chamber and to inter engage the valve seat to selectably block fluid flow through { HEAD ~ the valve seat gas port }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD