Ivalvu yokukhangela ibhekisa kwivalvu evula kwaye ivale ngokuzenzekelayo i-flap yevalvu ngokuxhomekeke ekuhambeni kwe-medium ngokwayo ukuthintela i-medium ukuba ingabuyeli umva. Ikwabizwa ngokuba yi-check valve, i-one-way valve, i-reverse flow valve, kunye ne-back pressure valve. Umsebenzi we-check valve ngu
Ivalvu yokukhangela luhlobo lwevalvu ezenzekelayo, umsebenzi wayo ophambili kukuthintela ukuhamba ngasemva kwesixhobo, ukuthintela ipompo kunye nemoto yokuqhuba ukuba ingabuyeli umva, kunye nokukhutshwa kwesixhobo sokuhambisa. Itshekhi ingasetyenziselwa ukubonelela ngemibhobho yeenkqubo ezincedisayo apho uxinzelelo lunokunyuka ngaphezu koxinzelelo lwenkqubo.
Uhlu lweevalvu zokujonga
Ngokwesakhiwo sayo kunye nendlela yokufakela, ivalvu yokujonga ingahlulwahlulwa ibe:

1. Ivalvu yokujonga iswing
Idiski yevalvu yokujonga ukujika imile okwediski kwaye ijikeleza umgodi wendlela yesihlalo sevalvu. Ngenxa yokuba indlela ekwivalvu ilungelelanisiwe, ukumelana nokuhamba kwamanzi kuncinci kunokwevalvu yokujonga ukuphakanyiswa. Ifanelekile kumazinga okuhamba kwamanzi aphantsi kunye neevalvu ezingabuyiyo. Izihlandlo ezinkulu zobubanzi kunye notshintsho oluqhelekileyo, kodwa ayifanelekanga ukuhamba kwamanzi okushukumayo, kwaye ukusebenza kwayo kokutywina akulunganga njengohlobo lokuphakamisa. Iivalvu zokujonga ukujika zahlulwe zibe ziintlobo ezintathu: ivalvu enye, ivalvu ephindwe kabini kunye nevalvu esiqingatha. Ezi ntlobo zintathu zahlulwe ngokubanzi ngokwedayamitha yevalvu. Injongo kukuthintela i-medium ukuba ingami okanye ihambe ngasemva kwaye yenze buthathaka ukuthuthumela kwe-hydraulic.

2. Ivalvu yokujonga ukuphakamisa
Ivalvu yokujonga enediski etyibilikayo ecaleni komgca othe nkqo womzimba wevalvu. Ivalvu yokujonga ukuphakama inokufakelwa kuphela kumbhobho othe tyaba, kwaye ibhola engqukuva ingasetyenziselwa idiski ebanzi kwivalvu yokujonga ephantsi enoxinzelelo oluphezulu. Imilo yomzimba wevalvu yevalvu yokujonga ukuphakama iyafana nevalvu yokumisa (engasetyenziswa ngokufanayo nevalvu yokumisa), ngoko ke i-coefficient yayo yokumelana nolwelo inkulu kakhulu. Ulwakhiwo lwayo lufana nevalvu yokumisa, kwaye umzimba wevalvu kunye nediski ziyafana nevalvu yokumisa. Inxalenye ephezulu yediski yevalvu kunye nenxalenye esezantsi yesigqubuthelo sevalvu zicutshungulwa ngemikhono yesikhokelo. Imikhono yesikhokelo sediski inokuphakama kwaye iwe ngokukhululekileyo kwimikhono yesikhokelo sevalvu. Xa i-medium ihla ngomlambo, iidiski zevalvu zivulwa ngokutyhalwa yi-medium. Xa i-medium ima, iidiski zevalvu zixhomekeke kuzo. Ziwela kwisihlalo sevalvu ukuthintela i-medium ukuba ingahambi ngasemva. Icala le-medium inlet kunye ne-outlet channel ye-straight-through lift check check valve lithe nkqo kwicala le-valve seat channel; ivalvu yokujonga ukuphakama ethe nkqo inecala elifanayo leendlela zokungena eziphakathi kunye nezokuphuma njengetshaneli yesihlalo sevalvu, kwaye ukumelana kwayo nokuhamba kwamanzi kuncinci kunohlobo oluthe tye.

3. Ivalvu yokujonga idiski
Ivalvu yivalvu yokujonga ejikeleza i-pin shaft kwisitulo sevalvu. Ivalvu yokujonga idiski inesakhiwo esilula kwaye inokufakelwa kuphela kumbhobho othe tye, ongasebenzi kakuhle ekutywineni.

4. Ivalvu yokujonga emgceni
Ivalvu yivalvu etyibilika kumgca ophakathi womzimba wevalvu. Ivalvu yokujonga emgceni luhlobo olutsha lwevalvu. Incinci ngobukhulu, ilula ngobunzima, kwaye ilungile kubuchwepheshe bokucubungula. Yenye yeendlela zophuhliso lweevalvu zokujonga. Nangona kunjalo, i-coefficient of fluid resistance inkulu kancinci kuneyevalvu yokujonga i-swing.
5. Ivalvu yokujonga ucinezelo
Olu hlobo lwevalvu lusetyenziswa njengevalvu yokucima amanzi kunye nomphunga kwibhoyila, inomsebenzi opheleleyo wevalvu yokujonga ukuphakanyiswa kunye nevalvu yokumisa okanye ivalvu ye-angle.