Izici zomkhiqizo
1. I-ventilation butterfly valve iyinoveli futhi inengqondo eklanyweni, ihlukile ngesakhiwo, ilula ngesisindo futhi iyashesha ekuvuleni nasekuvaleni.
2. I-valve ye-butterfly inezinzuzo zesikhashana esincane sokusebenza, ukusebenza okulula kanye nokonga umsebenzi ohlakaniphile.
3. Ukusebenzisa izinto ezifanele ukuhlangabezana namazinga okushisa ahlukene emidiya ephansi, ephakathi nendawo nephezulu kanye nemidiya egqwalayo.
4. Azikho izinduku zokuxhuma, ama-bolts, njll., ukusebenza okuthembekile, impilo ende yesevisi, engathinteki ngokuqondiswa kokugeleza kwemidiya.