To conserve the number of {TAIL ~ valves}, the system in one embodiment uses a three way valve to supply pressurized air to either a positive pressure tank for operating the fluid pumps or to {HEAD ~ a line} that supplies a cassette sealing bladder and a tubing pumping occluder bladder 
To conserve the number of { TAIL ~ valves } , the system in one embodiment uses a three way valve to supply pressurized air to either a positive pressure tank for operating the fluid pumps or to { HEAD ~ a line } that supplies a cassette sealing bladder and a tubing pumping occluder bladder
OTH OTH OTH OTH OTH 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 HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH