Iivalvu zesango zenzelwe ukuvulwa ngokupheleleyo okanye ukuvalwa ngokupheleleyo kwenkonzo. Zifakwe kwimibhobho njengezivalo zokuhlukanisa, kwaye akufanele zisetyenziswe njengokulawula okanye ukulawula iivalve. Ukusebenza kwevalve yesango kuyenziwa ukwenza i-clockwise ukuvala (CTC) okanye ngasekunene ukuvula (CTO) intshukumo ejikelezayo yesiqu. Xa usebenzisa isiqu sevalve, isango liya phezulu- okanye lisezantsi kwindawo enemisonto yesiqu.

Iivalve zesango zihlala zisetyenziswa xa ilahleko yoxinzelelo oluncinci kwaye i-free bore iyadingeka. Xa ivuleke ngokupheleleyo, ivalve yesango eqhelekileyo ayinamthintelo kwindlela yokuhamba ekhokelela ekulahlekeni koxinzelelo oluphantsi kakhulu, kwaye olu yilo lwenza kube lula ukusebenzisa ihagu yokucoca imibhobho. Ivalve yesango yivalve ye-multiturn ethetha ukuba ukusebenza kwevalve kwenziwa ngesiqu esinemisonto. Njengoko ivalve kufuneka ijike kaninzi ukusuka kwindawo evulekileyo ukuya kwindawo evaliweyo, ukusebenza kancinci kuthintela iziphumo zehamile yamanzi.

Iivalvu zesango zingasetyenziselwa inani elikhulu lolwelo. iivalve zesango zifanelekile phantsi kwezi meko zilandelayo zokusebenza:

• Amanzi okusela, amanzi amdaka kunye nolwelo olungathathi hlangothi: ubushushu obuphakathi kwe -20 kunye +70 °C, ubuninzi besantya sokuhamba kwe-5 m/s kunye nokuya kuthi ga kwi-16 yeebhari ezahlukeneyo zoxinzelelo.
• Igesi: iqondo lokushisa phakathi kwe -20 kunye +60 °C, ubuninzi be-20 m / s ukuhamba kwesantya kunye nokuya kuthi ga kwi-16 ye-bar eyahlukeneyo yoxinzelelo.

I-parallel vs iivalvu zesango ezimile okwe wedge

Iivalve zesango zinokwahlulwa zibe ziindidi ezimbini eziphambili: I-Parallel kunye ne-wedge-shaped. Izivalo zesango ezinxuseneyo zisebenzisa isango elisicaba phakathi kwezihlalo ezibini ezinxuseneyo, kwaye uhlobo oludumileyo yivalve yesango lemela eyilelwe ngomphetho obukhali emazantsi esango. Iivalvu zesango ezimilise okwe wedge zisebenzisa izihlalo ezibini ezithambekileyo kunye nesango elithambekileyo elingahambelaniyo kancinane.

Intsimbi ehleliyo vs iivalvu zesango ezihlala zihleli

Phambi kokuba ivalufa yesango eyomelelayo yaziswe emarikeni, iivalvu zesango ezinentsimbi ehleliyo zazisetyenziswa kakhulu. Uyilo lwe-conical wedge kunye nezixhobo zokutywina ze-angular zentsimbi ehleliyo ifuna ukudakumba kumzantsi wevalvu ukuqinisekisa ukuvaleka okuqinileyo. Ngale nto, isanti kunye neengqalutye zifakwe kwibhore. Inkqubo yombhobho ayinakuze ikhululeke ngokupheleleyo kwizinto ezingcolileyo kungakhathaliseki ukuba umbhobho uhlanjululwe ngokucokisekileyo xa ufaka okanye ulungiswa. Ngaloo ndlela nayiphi na i-wedge yentsimbi ekugqibeleni iya kuphulukana namandla ayo okuba i-drop-tight.

Ivalve yesango eyomelelayo ehleliyo inomzantsi wevalve ongenanto evumela indawo esimahla yesanti kunye neengqalutye kwivalve. Ukuba ukungcola kuyadlula njengoko ivalve ivala, umphezulu werabha uya kuvala ujikeleze ukungcola ngelixa ivalve ivaliwe. Ikhompawundi yerabha ekumgangatho ophezulu ifunxa ukungcola njengoko ivalve ivala, kwaye ukungcola kuya kugungxulwa xa ivalve ivulwa kwakhona. Umphezulu werabha uya kuphinda ufumane ubume bawo boqobo obukhusela ukutywinwa kokuqina.

Uninzi lweevalvu zamasango ziyakwazi ukuqina, nangona kunjalo iivalvu zentsimbi ezihlalayo zisacelwa kwezinye iimarike, ngoko ke ziseyinxalenye yoluhlu lwethu lokubonelela ngamanzi kunye nokucocwa kwamanzi amdaka.