A ivalvu yesangoiyivalvu ehamba phezulu naphansi ngomugqa oqondile eduze kwesihlalo sevalvu (indawo yokuvala), lapho ingxenye yokuvula neyokuvala (isango) iqhutshwa yisiqu sevalvu.

1. Yeka ukuthiivalvu yesangoingabe

Uhlobo lwevalvu yokuvala ebizwa ngokuthi ivalvu yesango isetshenziselwa ukuxhuma noma ukuxhumanisa i-medium epayipini. Ivalvu yesango inezindlela eziningi ezahlukene zokusebenzisa. Amavalvu esango asetshenziswa kakhulu enziwe eShayina anezici zokusebenza ezilandelayo: ingcindezi ejwayelekile i-PN1760, usayizi ojwayelekile i-DN151800, kanye nokushisa kokusebenza okungu-t610°C.

2. Izici ze-ivalvu yesango

① Izinzuzo zevalvu yesango

A. Kuncane ukumelana noketshezi. I-medium ayishintshi indlela yokugeleza kwayo lapho idlula ku-valve yesango njengoba isiteshi esiphakathi ngaphakathi komzimba we-valve yesango siqondile, okunciphisa ukumelana noketshezi.

B. Kuncane ukumelana ngesikhathi sokuvula nokuvala. Uma kuqhathaniswa nevalvu yomhlaba, ukuvulwa nokuvalwa kwevalvu yesango konga kakhulu abasebenzi ngoba isiqondiso sokuhamba kwesango siqonde ngqo esiyalweni sokugeleza.

C. Isiqondiso sokugeleza kwe-medium asinqunyelwe. Njengoba i-medium ingageleza kunoma iyiphi indlela isuka kunoma yiluphi uhlangothi lwe-valve yesango, ingafeza injongo yayo ehlosiwe futhi ifaneleka kakhulu kumapayipi lapho isiqondiso sokugeleza kwe-media singashintsha khona.

D. Yisakhiwo esifushane. Ubude besakhiwo sevalvu yomhlaba bufushane kunobevalvu yesango ngoba idiski yevalvu yomhlaba ibekwe ngokuvundlile emzimbeni wevalvu kuyilapho ivalvu yesango yevalvu yesango ibekwe ngokuvundlile ngaphakathi komzimba wevalvu.

E. Amakhono okuvala asebenzayo. Indawo yokuvala ayiboli kakhulu uma ivuliwe ngokuphelele.

② Izingqinamba zevalvu yesango

A. Kulula ukulimaza indawo yokuvala. Indawo yokuvala yesango kanye nesihlalo se-valve ihlangabezana nokungqubuzana okulinganiselwe lapho ivuleka futhi ivala, okonakala kalula futhi kunciphisa ukusebenza kokuvala kanye nesikhathi sokuphila.

B. Ukuphakama kukhulu futhi izikhathi zokuvula nokuvala zinde. Ukushaya kwepuleti lesango kukhulu, kudingeka isikhala esithile ukuze kuvulwe, futhi ubukhulu bangaphandle buphakeme ngoba ivalvu yesango kumele ivulwe ngokugcwele noma ivalwe ngokuphelele ngenkathi ivulwa futhi ivalwa.

Isakhiwo esiyinkimbinkimbi, uhlamvu C. Uma kuqhathaniswa nevalvu yomhlaba, kunezingxenye eziningi, kuyinkimbinkimbi kakhulu ukuyikhiqiza nokuyinakekela, futhi kubiza kakhulu.

3. Ukwakhiwa kwevalvu yesango

Umzimba wevalvu, ibhonethi noma ibhulakhethi, isiqu sevalvu, i-nut yesiqu sevalvu, ipuleti lesango, isihlalo sevalvu, indilinga yokupakisha, ukupakisha kokuvala, i-packing gland, kanye nedivayisi yokudlulisela kwakha iningi levalvu yesango.

I-valve ye-bypass (i-valve yokumisa) ingaxhunywa ngokuhambisanayo kumapayipi okungena nawokuphuma eduze kwama-valve esango anobubanzi obukhulu noma aphezulu ukuze kuncishiswe i-torque yokuvula nokuvala. Vula i-valve ye-bypass ngaphambi kokuvula i-valve yesango uma usebenzisa ukulinganisa ingcindezi kuzo zombili izinhlangothi zesango. Ububanzi obujwayelekile be-valve ye-bypass buyi-DN32 noma ngaphezulu.

① Umzimba wevalvu, owakha ingxenye ephethe ingcindezi yesiteshi sokugeleza okuphakathi futhi ongumzimba oyinhloko wevalvu yesango, unamathiselwe ngqo epayipini noma (emishinini). Kubalulekile ekubekeni isihlalo sevalvu endaweni, ukufaka isembozo sevalvu, nokujoyina ipayipi. Ukuphakama kwegumbi levalvu yangaphakathi kukhulu ngoba isango eliyi-disc, eliqonde phezulu naphansi, lidinga ukungena emzimbeni wevalvu. Ingcindezi evamile inquma kakhulu ukuthi ingxenye yomzimba wevalvu ibunjwe kanjani. Isibonelo, umzimba wevalvu yesango levalvu yengcindezi ephansi ungasikwa ukuze kufinyezwe ubude besakhiwo sawo.

Emzimbeni wevalvu, iningi lezindlela eziphakathi linesigaba esiyindilinga. Ukuncipha kuyindlela engasetshenziswa futhi kumavalvu esango anobubanzi obukhulu ukwehlisa usayizi wesango, amandla okuvula nokuvala, kanye ne-torque. Uma kusetshenziswa ukuncipha, ukumelana koketshezi kuvalvu kuyanda, okubangela ukwehla kwengcindezi kanye nokwenyuka kwezindleko zamandla. Ngakho-ke isilinganiso sokuncipha kwesiteshi akufanele sibe ngokweqile. Ibha yebhasi ye-angle yokuthambekela kwesiteshi esinciphayo emgqeni ophakathi akufanele ibe ngaphezu kuka-12°, futhi isilinganiso sobubanzi besiteshi sesihlalo sevalvu nobubanzi baso obujwayelekile kufanele sibe phakathi kuka-0.8 no-0.95.

Ukuxhumana phakathi komzimba we-valve nepayipi, kanye nomzimba we-valve kanye ne-bonnet, kunqunywa isakhiwo somzimba we-valve yesango. Ukushisela okuhlanganisiwe, okuhlanganisiwe, okuhlanganisiwe, ukushisela okuhlanganisiwe, kanye nokushisela ipuleti leshubhu konke kuyizinketho zobulukhuni bomzimba we-valve. Kuma-diameter angaphansi kwe-DN50, imizimba yama-valve okuhlanganisiwe ivame ukusetshenziswa, imizimba yama-valve okuhlanganisiwe ivame ukusetshenziswa, ama-valve ahlanganisiwe avame ukusetshenziswa ekushiseni okuhlanganisiwe okungafinyeleli ezimisweni, kanye nezakhiwo ezihlanganisiwe zingasetshenziswa. Imizimba yama-valve okuhlanganisiwe ivame ukusetshenziswa kuma-valve anezinkinga ngenqubo yonke yokushisisa.

②Isembozo sevalvu sinebhokisi lokugcwala kuso futhi sinamathele emzimbeni wevalvu, okwenza kube yingxenye eyinhloko ephethe ingcindezi yegumbi lokucindezela. Isembozo sevalvu sifakwe izingxenye ezisekelayo zomshini, njengezinti zesiqu noma izindlela zokudlulisa, zamavalvu anobubanzi obuphakathi nobuncane.

③I-stem nut noma ezinye izingxenye zedivayisi yokudlulisa zisekelwa yi-bracket, enamathiselwe kwi-bonnet.

④Isiqu se-valve sixhunywe ngqo ne-stem nut noma idivayisi yokudlulisa. Ingxenye yentonga epholishiwe kanye nokupakisha kwakha i-sealing pair, engadlulisa i-torque futhi idlale indima yokuvula nokuvala isango. Ngokwendawo yentambo esiqwini se-valve, i-stem gate valve kanye ne-hidden stem gate valve kuyahlukaniswa.

A. I-valve yesango lesiqu esikhuphukayo yileyo enentambo yokudlulisela engaphandle kwesikhala somzimba futhi isiqu sayo se-valve singahamba phezulu naphansi. I-nut yesiqu esisebhulakhethini noma ebhonethini kumele ijikeleziswe ukuze kuphakanyiswe isiqu se-valve. Intambo yesiqu kanye ne-nut yesiqu azithintani nendawo futhi ngenxa yalokho azithinteki izinga lokushisa kanye nokugqwala kwendawo, okwenza zithandwe. I-nut yesiqu ingajikeleza kuphela ngaphandle kokuhamba phezulu naphansi, okuyinto ezuzisa ukugcotshwa kwesiqu se-valve. Ukuvulwa kwesango nakho kucacile.

B. Amavalvu esango lesiqu esimnyama anentambo yokudlulisa etholakala ngaphakathi kwesikhala somzimba kanye nesiqu sevalvu esijikelezayo. Ukujikeleza isiqu sevalvu kushayela i-stem nut epuletini lesango, okwenza isiqu sevalvu sikhuphuke futhi siwe. Isiqu sevalvu singajikeleza kuphela, singanyuki phezulu noma phansi. Ivalvu kunzima ukuyiphatha ngenxa yokuphakama kwayo okuncane kanye nokushaya okunzima kokuvula nokuvala. Izinkomba kumele zifakwe. Ifanele indawo engeyona eyonakalisayo kanye nezimo ezinezimo zezulu ezingezinhle ngoba izinga lokushisa kanye nokugqwala kwendawo engaphakathi kuthinta ukuxhumana phakathi kwentambo yesiqu sevalvu kanye ne-stem nut kanye nendawo engaphakathi.

⑤Ingxenye yepheya le-kinematic elingaxhunywa ngqo kudivayisi yokudlulisa kanye ne-transmit torque yakhiwe yi-valve stem nut kanye neqembu le-valve stem thread.

⑥Isiqu se-valve noma i-stem nut inganikezwa ngqo amandla kagesi, amandla omoya, amandla e-hydraulic, kanye nomsebenzi ngedivayisi yokudlulisela. Ukushayela ibanga elide ezitshalweni zamandla kuvame ukusebenzisa amasondo esandla, izembozo zama-valve, izingxenye zokudlulisela, imiphini yokuxhuma, kanye nama-coupling ajwayelekile.

⑦Isihlalo samavalvu Ukugoqa, ukushisela, ukuxhumeka okunezintambo, kanye nezinye izindlela zisetshenziselwa ukubopha isihlalo samavalvu emzimbeni wamavalvu ukuze sikwazi ukuvala ngesango.

⑧Kuye ngezidingo zekhasimende, indandatho yokuvala ingafakwa ngqo emzimbeni wevalvu ukuze kudalwe indawo yokuvala. Indawo yokuvala ingaphathwa ngqo emzimbeni wevalvu ngamavalvu enziwe ngezinto ezifana nensimbi ecijile, insimbi engagqwali ye-austenitic, kanye ne-alloy yethusi. Ukuze kuvinjelwe ukuthi le nto ingavuzi eceleni kwesiqu sevalvu, ukupakisha kufakwa ngaphakathi kwebhokisi lokugcwalisa (ibhokisi lokugcwalisa).