Lub orifice valve phaj yog cov hlau disk nrog lub qhov concentric hauv nws, uas, thaum muab tso rau hauv cov yeeb nkab, txwv tsis pub cov dej ntws thiab txo qhov siab. Orifice valve daim hlau yog qhov tseem ceeb hauv kev lag luam uas tswj cov khoom ua kua thiab cov roj gaseous raws li lawv tsim lub hauv paus ntawm kev ntsuas dej hauv cov ntsuas dej ntws.

Lub pob valve phaj yog piav qhia rau kev siv nyob rau hauv ib qho hluav taws xob roj injector ntawm hom siv los tso roj rau hauv cov combustion chambers ntawm lub cav combustion sab hauv. Lub orifice valve phaj yog ib puag ncig configuration nrog ib tug upstream nto thiab ib tug tawm tsam downstream nto thiab nrog ib tug central axis. Lub axis ntawm txhua qhov kev nkag mus yog inclined downward ntawm lub kaum sab xis mus rau hauv nruab nrab axis thiab txuas mus rau sab hauv los ntawm sab saud mus rau hauv qab dej kawg ntawm txoj kev orifice thiaj li hais tias txhua txoj kev orifice yuav coj cov kwj ntawm cov roj downstream mus rau hauv nruab nrab axis uas yog cov kwj deg. los ntawm orifice cov nqe lus yuav yog li tsawg kawg ib feem cuam tshuam rau ib leeg thiaj li tsim tau tag nrho cov roj txau cov qauv.

Nws qhov zoo dua yog tias qhov throttle tsis tas yuav tsum tau ntsuas, thiab ntsuas qhov tseeb. Cov qauv yooj yim, compact, me me, lub teeb yuag. Muaj ntau yam kev siv, suav nrog tag nrho cov kua dej ib zaug thiab qee qhov ntau theem ntws. Orifice valve daim hlau ntawm qhov sib txawv apertures tuaj yeem hloov pauv tsis tu ncua nrog kev hloov pauv ntawm tus nqi ntws, thiab tuaj yeem kuaj xyuas thiab hloov pauv hauv online.