I te marama o Hune, 2018, Ko tetahi o taatau kaihoko i Pakistan, Karachi, e hiahia ana ratou ki te rotameter ngongo whakarewa mo te ine i te hāora.
Ko o raatau ahuatanga mahi penei i raro nei:
Paipa:φ70*5，Max. Rere 110m3/h，Mini.flow 10m3/h，pehanga mahi 1.3MPa，mahi pāmahana 30℃，te pehanga barometric rohe 0.1MPa.
Ko ta matou tataunga penei i raro nei:
①Hauora kiato:
I raro i te ahua Paerewa:ρ20=1.331kg/m3
I raro i te ahua mahi:ρ1=ρ20*(P1T20/PNT1Z)=1.331*{(1.3+0.1)*(27*+20)/[0.1013*(27*+30)*0.992]｝=17.93kg/ m3
②Rere Tuturu:
QS=Q20ρ20/ρ
QSmax=Q20maxρ20/ρ1=110*1.331/17.93=8.166
QSmin=Q20minρ20/ρ1=10*1.331/17.93=0.742
③Ko te rotameter ngongo whakarewa mo te tikanga mahi mahi:
QNmax=QSmax/0.2696=8.166/0.2696=30.29
QNmin=QSmax/0.2696=0.742/0.2696=2.75
I raro i ta maatau tatauranga, he pai te tukatuka me te tino mana o te kounga, i muri i te whakaurunga, ka tino pai te mahi, ka pai ake te mahi a te kaiwhakamahi mutunga, ko te kounga o nga hua e tino mohiotia ana e to taatau kaihoko.
