(1) Lub rooj vag valve: Nws feem ntau siv los txiav tawm qhov ntws.
(2) Pob valve: Nws siv rau kev tswj hwm kev ntws thiab throttling.
(3) Kos lub valve: Nws tsuas yog ua haujlwm nkaus xwb ntawm inhibiting lossis tiv thaiv cov khoom rov qab ntawm cov kav dej.
(4) Kev nyab xeeb valve thiab lub siab nyem valve: siv los daws qhov teeb meem overpressure los tiv thaiv cov khoom puas.
(5) Globe valve: feem ntau siv los kho qhov ntws
