Iivalvu zeglobhuibiyeyona nto iphambili ekulawuleni ulwelo iminyaka engama-200 kwaye ngoku ifumaneka kuyo yonke indawo.Nangona kunjalo, kwezinye ii-applications, uyilo lwevalvu yeglowubhu lunokuthi lusetyenziswe ukulawula ukuvalwa ngokupheleleyo kolwelo.Iivalvu zeglowubhu zidla ngokusetyenziswa ukulawula ukuhamba kwamanzi.Ivalve yeglowubhu ivuliwe/ivaliwe kunye nokusetyenziswa kokumodareyitha kunokubonwa kumphandle wezindlu kunye nezakhiwo zoshishino, apho iivalvu zibekwe rhoqo.

Umphunga namanzi zaziyimfuneko kwiNguqu yezoShishino, kodwa ezi zinto zinokuba yingozi kwakufuneka zithintelwe.Iivalve yeglowubhusisivalo sokuqala esifunekayo ukugqibezela lo msebenzi ngempumelelo.Uyilo lwevalvu yeglowubhu lube yimpumelelo kwaye luthandwe kakhulu kangangokuba lukhokelele kuninzi lwabavelisi abakhulu bevalvu yemveli (iCrane, iPowell, iLunkenheimer, iChapman, kunye neJenkins) bafumana amalungelo awodwa abenzi bokuqala.

Iivalvu zesangozenzelwe ukuba zisetyenziswe kwindawo evuleke ngokupheleleyo okanye evalwe ngokupheleleyo, kanti iivalvu zeglowubhu zingasetyenziswa njengebloko okanye iivalvu zokwahlula kodwa ziyilelwe ukuba zivuleleke ngokuyinxenye ukulawula ukuhamba xa zilawula.Unonophelo kufuneka lusetyenziswe kwizigqibo zoyilo xa kusetyenziswa iivalvu zeglowubhu kwiivalvu ezisebenza zodwa kunye nezivaliweyo, njengoko kulucelomngeni ukugcina isitywina esiqinileyo ngokutyhala okukhulu kwidiski.Amandla olwelo aya kunceda ukufezekisa isitywina esilungileyo kwaye wenze kube lula ukutywina xa umbane uphuma phezulu ukuya phezulu.

Iivalvu zeglowubhu zigqibelele usetyenziso lwevalvu yolawulo ngenxa yomsebenzi wayo olawulayo, ovumela ulawulo olucokisekileyo olunendawo kunye nee actuators eziqhagamshelwe kwibhonethi yevalve yeglowubhu kunye nesiqu.Bagqwesa kwinani lezicelo zolawulo lwe-fluid kwaye zibhekiswa kuzo kwezi zicelo njenge "Elements Final Control".

indlela yokuhamba engathanga ngqo

IGlobe ikwabizwa ngokuba sisivalo seglowubhu ngenxa yokumila kwayo kwantlandlolo engqukuva, esafihla indalo engaqhelekanga nebhidekile yendlela yokuhamba.Ngemijelo yaso ephezulu nasezantsi, ivalve yeglowubhu evuleke ngokupheleleyo isabonisa ukukhuhlana okubalulekileyo okanye umqobo wokuhamba kolwelo ngokwahlukileyo kwisango elivuleke ngokupheleleyo okanye ivalve yebhola.Ukukhuhlana kolwelo olubangelwa kukuhamba okuthe tye kucothisa ukudlula kwivalve.

I-flow coefficient, okanye "i-Cv," yevalvu isetyenziselwa ukubala ukuhamba kwayo.Iivalvu zesango zinokumelana okuncinci kakhulu kokuhamba xa zikwindawo evulekileyo, kungoko i-Cv iya kwahluka kakhulu kwivalve yesango kunye nevalve yeglowubhu enobungakanani obufanayo.

I-disc okanye iplagi, esebenza njengendlela yokuvala ivalve yeglowubhu, inokuveliswa kwiimilo ezahlukeneyo.Umlinganiselo wokuhamba ngevalve unokutshintsha ngokuphawulekayo ngokusekelwe kwinani lesiqu se-spins xa ivalve ivuliwe ngokuguqula imilo yediski.Uyilo lwediski olugobileyo oluqhelekileyo okanye "lwemveli" lusetyenziswa kuninzi lwezicelo kuba lulunge ngakumbi kunolunye uyilo lwentshukumo ethile (ukujikeleza) kwesiqu sevalve.Iidiski ze-V-port zifanelekile kuzo zonke iisayizi zeevalvu zeglowubhu kwaye ziyilelwe uthintelo lokuhamba kakuhle kuzo zonke iipesenti zokuvula ezahlukeneyo.Ukulawulwa kokuhamba ngokupheleleyo yinjongo yeentlobo zeenaliti, nangona kunjalo zihlala zinikezelwa kuphela kwiidamitha ezincinci.Into ethambileyo, eyomelelayo inokufakwa kwidiski okanye kwisitulo xa ukuvalwa ngokupheleleyo kufuneka.

Ukunqunyulwa kwevalve yeglowubhu

Ukuvalwa kwecandelo lokwenyani kwi-valve yeglowubhu kubonelelwa nge-spool.Isihlalo, idiski, isiqu, isitulo sangasemva, kwaye ngamanye amaxesha izixhobo ezincamathelisa isiqu kwidiski zenza isiqwenga sevalve yeglowubhu.Nakuphi na ukusebenza kakuhle kwevalvu kunye nobude bobomi buxhomekeke kuyilo lwetrim kunye nokhetho lwemathiriyeli, kodwa iivalvu zeglowubhu zisesichengeni ngakumbi ngenxa yokukhuhlana kwazo okuphezulu kunye neendlela ezintsonkothileyo zokuhamba.Isantya kunye nesiphithiphithi siphakama njengoko isihlalo kunye nediski zisondela enye kwenye.Ngenxa yendalo eyingozi yolwelo kunye nokunyuka kwesantya, kunokwenzeka ukonakalisa i-valve trim, eya kwandisa kakhulu ukuvuza kwevalve xa ivaliwe.Umtya ligama lesiphoso elivela ngamanye amaxesha njengama-flakes amancinci esihlalweni okanye kwi-disc.Into eqale njengendlela encinci yokuvuza inokukhula kwaye ijike ibe kukuvuza okubalulekileyo ukuba ayilungiswanga ngexesha elifanelekileyo.

Iplagi yevalve kwiivalvu zeglowubhu yebronzi ezincinci ikholisa ukwenziwa ngento efanayo nomzimba, okanye ngamanye amaxesha ialloyi eyomeleleyo efana nebronze.Eyona mathiriyeli iqhelekileyo yespool yeevalvu zeglowubhu yentsimbi yibronze.I-IBBM, okanye “uMzimba weIron, ukuNyulwa kweBronzi,” ligama lesi sinxibo sentsimbi.Kukho izinto ezininzi ezahlukeneyo zokunquma ezifumanekayo kwiivalvu zentsimbi, kodwa kaninzi i-trim enye okanye ngaphezulu ielementi zenziwe nge-400 series martensitic steel stainless.Ukongeza, izixhobo eziqinileyo ezifana ne-stellite, ii-steels ezingama-300 ze-stainless, kunye ne-alloys zethusi-nickel ezifana ne-Monel ziyasebenza.

Zintathu iindlela ezisisiseko zeevalvu zeglowubhu.Ubume "T", kunye ne-stem perpendicular to flow flow pipe, yeyona nto iqhelekileyo.
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Ngokufana ne-T-valve, i-valve ye-angle ijikeleza ukuhamba ngaphakathi kwe-valve ye-90 degrees, isebenza njengesixhobo sokulawula ukuhamba kunye ne-90 degree pipe elbow.Kwi-oyile kunye negesi "imithi yeKrisimesi," iivalvu zeglowubhu ye-engile luhlobo lwevalvu yokugqibela elawulayo esasetyenziswa rhoqo ngaphezulu kweebhoyila.
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Uyilo lwe "Y", oluyilwesithathu, lujolise ekuqiniseni uyilo lwe-on / off application ngelixa kuncitshiswa ukuhamba okungahambi kakuhle okwenzeka kumzimba wevalve yeglowubhu.Ibhonethi, isiqu, kunye nediski yolu hlobo lwevalve yeglowubhu zijikwe kwi-engile ye-30-45 degrees ukwenza indlela yokuhamba ichaneke ngakumbi kwaye inciphise ukukhuhlana kwamanzi.Ngenxa yokuhla kokukhuhlana, ivalve ayinakufane igcine umonakalo okhukulisekileyo kunye neempawu zokuqukuqela kwenkqubo yemibhobho ziyaphuculwa.