Underpressure arises due to condensation of the steam from the steam gas mixture, leaving dryer 15, in condenser {TAIL ~ 16 and gas evacuation} of non condensing gases by {HEAD ~ vacuum pump} 17 
Underpressure arises due to condensation of the steam from the steam gas mixture , leaving dryer 15 , in condenser { TAIL ~ 16 and gas evacuation } of non condensing gases by { HEAD ~ vacuum pump } 17
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH