I-valve iyithuluzi noma into engokwemvelo elawula, eqondisa noma elawula ukugeleza koketshezi (amagesi, uketshezi, okuqinile okuketshezi, noma ama-slurries) ngokuvula, ukuvala, noma ukuvimbela kancane amaphaseji ahlukahlukene. Amavalvu ayizinto zokufakelwa ngokobuchwepheshe, kodwa ngokuvamile axoxwa njengesigaba esihlukile. Ku-valve evulekile, uketshezi lugeleza luye ohlangothini lusuka kumfutho ophakeme luye kwingcindezi ephansi. Igama lisuselwa kwelesiLatini elithi valva, ingxenye enyakazayo yomnyango, yona isuka ku-volvere, ukujika, ukugoqa.

Ivalvu elula, nendala kakhulu, imane nje iyi-flap enamahinge ngokukhululekile ejikela phansi ukuze ivimbe uketshezi (igesi noma uketshezi) ukugeleza ohlangothini olulodwa, kodwa iphushwa phezulu ukugeleza ngokwako lapho ukugeleza kuhamba ngakolunye uhlangothi. Lokhu kubizwa ngokuthi i-valve yokuhlola, njengoba ivimbela noma "ihlola" ukugeleza ohlangothini olulodwa. Amavalvu okulawula esimanje angase alawule ukucindezela noma agelezele ezansi nomfula futhi asebenze kumasistimu ezishintshayo ayinkimbinkimbi.

Amavalvu anokusetshenziswa okuningi, okuhlanganisa ukulawula amanzi okunisela, ukusetshenziswa kwezimboni zokulawula izinqubo, ukusetshenziswa kwendawo yokuhlala njengokuvula/ukuvala nokulawula ukucindezela izitsha neziwasha izingubo nompompi ekhaya. Ngisho namathini esifutho se-aerosol ane-valve encane eyakhelwe ngaphakathi. Ama-valve abuye asetshenziswe emkhakheni wezempi nowezokuthutha. Kumapayipi e-HVAC nokunye ukugeleza komoya oseduze nomkhathi, ama-valve esikhundleni salokho abizwa ngokuthi ama-dampers. Ezinhlelweni zomoya ezicindezelwe, nokho, amavalvu asetshenziswa ngohlobo oluvame kakhulu amavalvu ebhola.
Izinhlelo zokusebenza

Amavalvu atholakala cishe kuzo zonke izinhlelo zezimboni, okuhlanganisa ukucutshungulwa kwamanzi nendle, izimayini, ukukhiqizwa kukagesi, ukucutshungulwa kukawoyela, igesi nophethiloli, ukukhiqizwa kokudla, ukwenziwa kwamakhemikhali nepulasitiki neminye imikhakha eminingi.

Abantu basemazweni athuthukile basebenzisa ama-valve ekuphileni kwabo kwansuku zonke, okuhlanganisa ama-valve okufaka amapayipi amanzi, njengompompi bamanzi ampompi, ama-valve okulawula igesi ezitsheni, ama-valve amancane afakwe emishinini yokuwasha neziwasha izitsha, izinto zokuphepha ezifakwe ezimisweni zamanzi ashisayo nama-poppet valves emotweni. izinjini.

Emvelweni kunamavalvu, isibonelo amavalvu endlela eyodwa emithanjeni elawula ukujikeleza kwegazi, namavalvu enhliziyo alawula ukugeleza kwegazi emagumbini enhliziyo nokugcina isenzo sokumpompa esifanele.

Amavalvu angase asetshenziswe ngesandla, kungaba isibambo, i-lever, i-pedal noma isondo. Amavaluvu nawo angase abe othomathikhi, aqhutshwa izinguquko zokucindezela, izinga lokushisa, noma ukugeleza. Lezi zinguquko zingase zisebenze phezu kwe-diaphragm noma i-piston yona eyenza i-valve isebenze, izibonelo zalolu hlobo lwama-valve ezitholakala ngokuvamile amavalvu okuphepha afakwe ezinhlelweni zamanzi ashisayo noma kumabhayela.

Amasistimu okulawula ayinkimbinkimbi kakhulu asebenzisa amavalvu adinga ukulawula okuzenzakalelayo okusekelwe kokokufaka kwangaphandle (okungukuthi, ukulawula ukugeleza ngepayipi kuya endaweni eshintshayo yesethi) kudinga i-actuator. I-actuator izoshaya i-valve kuye ngokufaka kwayo nokusetha, ivumele i-valve ukuthi imiswe ngokunembile, futhi ivumele ukulawula phezu kwezidingo ezihlukahlukene.
Ukwehluka

Ama-valve ayahluka kakhulu ngefomu nokusetshenziswa kwawo. Amasayizi[okungacacile] ngokuvamile asukela ku-0.1 mm kuya ku-60 cm. Amavalvu akhethekile angaba nobubanzi obudlula amamitha angu-5.[yiphi?]

Izindleko zevalvu zisukela kumavalvu alahlwayo alula angabizi kuye kumavalvu akhethekile abiza izinkulungwane zamadola aseMelika iyintshi ngayinye yobubanzi bevalvu.

Amavalvu alahlwayo angase atholakale ezintweni zasendlini ezivamile ezihlanganisa izikhithi zephampu ezincane namakani aerosol.

Ukusetshenziswa okuvamile kwegama elithi valve kubhekisela kumavalvu e-poppet atholakala kuningi lezinjini zesimanje zangaphakathi ezivuthayo njengalezo ezitholakala ezimotweni eziningi ezinamandla kaphethiloli asetshenziselwa ukulawula ukungenisa kwengxube kaphethiloli komoya kanye nokuvumela ukuphuma kwegesi ekhishwayo.
Izinhlobo

Ama-valve ahluke kakhulu futhi angase ahlukaniswe ngenani lezinhlobo eziyisisekelo. Ama-valve nawo angahlukaniswa ngendlela acushwa ngayo:

I-Hydraulic
I-pneumatic
Imanuwali
I-valve ye-Solenoid
Imoto