Amavalvu embulungaI-globe valve ibilokhu iyinsika ekulawuleni uketshezi iminyaka engu-200 futhi manje itholakala yonke indawo. Kodwa-ke, kwezinye izinhlelo zokusebenza, imiklamo yamavalvu embulunga ingasetshenziswa futhi ukuphatha ukuvalwa ngokuphelele koketshezi. Amavalvu embulunga avame ukusetshenziselwa ukulawula ukugeleza koketshezi. Ivalvu yembulunga ivuliwe/ivaliwe futhi isetshenziswa ngendlela yokulawula ingabonakala ngaphandle kwezindlu nezakhiwo zebhizinisi, lapho amavalvu evame ukufakwa khona.

Umusi namanzi kwakubalulekile eNguquko Yezimboni, kodwa lezi zinto ezingaba yingozi kwakudingeka zivinjelwe.ivalvu yomhlabaiyivalvu yokuqala edingekayo ukuze kuqedwe lo msebenzi ngempumelelo. Umklamo wamavalvu omhlaba wawuphumelela kakhulu futhi wathandwa kakhulu kangangokuthi waholela ekutheni iningi labakhiqizi abakhulu bamavalvu bendabuko (Crane, Powell, Lunkenheimer, Chapman, kanye noJenkins) bathole amalungelo abo obunikazi okuqala.

Amavalvu esangokuhloswe ukuthi kusetshenziswe ezindaweni ezivulekile ngokuphelele noma ezivalwe ngokuphelele, kanti ama-globe valve angasetshenziswa njengama-block noma ama-isolation valve kodwa aklanyelwe ukuthi avuleke kancane ukulawula ukugeleza lapho kulawulwa. Kufanele kuqashelwe ezinqumweni zokuklama lapho kusetshenziswa ama-globe valve kuma-isolation valve asebenza ngawo kanye nasebenza ngokuvula, njengoba kuyinselele ukugcina ukuvala okuqinile ngokucindezela okukhulu kwidiski. Amandla oketshezi azosiza ekufinyeleleni ukuvala okuhle futhi enze kube lula ukuvala lapho uketshezi lugeleza lusuka phezulu luye phansi.

Ama-valve e-globe afanele ukusetshenziswa kwama-valve okulawula ngenxa yomsebenzi wawo wokulawula, okuvumela ukulawulwa okuhle kakhulu ngama-positioners nama-actuator axhunywe kwi-bonnet ye-globe valve kanye nesiqu. Ahamba phambili ezinhlelweni eziningi zokulawula uketshezi futhi kulezi zinhlelo abizwa ngokuthi “Izinto Zokulawula Zokugcina.”

indlela yokugeleza engaqondile

I-Globe yaziwa nangokuthi i-globe valve ngenxa yesimo sayo sokuqala esiyindilinga, esisafihla isimo esingavamile nesiguquguqukayo sendlela yokugeleza. Njengoba iziteshi zayo eziphezulu nezingezansi zigobile, i-globe valve evulekile ngokuphelele isabonisa ukungqubuzana okukhulu noma isithiyo ekugelezeni koketshezi ngokungafani ne-gate noma i-ball valve evulekile ngokuphelele. Ukungqubuzana koketshezi okubangelwa ukugeleza okugobile kunciphisa ukudlula kwe-valve.

I-flow coefficient, noma i-“Cv,” yevalvu isetshenziselwa ukubala ukugeleza kwayo. Amavalvu esango anokumelana okuncane kakhulu kokugeleza uma esendaweni evulekile, ngakho-ke i-Cv izohluka kakhulu kwivalvu yesango kanye nevalvu yomhlabathi enobukhulu obufanayo.

Idiski noma ipulaki, esebenza njengendlela yokuvala ivalvu yomhlaba, ingakhiwa ibe yizinhlobo ezahlukene. Izinga lokugeleza ngevalvu lingashintsha kakhulu ngokusekelwe enanini lokujikeleza kwesiqu lapho ivalvu ivuliwe ngokushintsha ukuma kwediski. Umklamo wediski ogobile ojwayelekile noma "wendabuko" usetshenziswa ezicelweni eziningi ngoba ulungele kangcono kuneminye imiklamo yokunyakaza okuthile (ukujikeleza) kwesiqu sevalvu. Amadiski e-V-port afanele bonke osayizi bamavalvu embulunga futhi aklanyelwe ukuvinjelwa kokugeleza okuncane kumaphesenti ahlukahlukene okuvula. Ukulawulwa kokugeleza okuphelele kuyinjongo yezinhlobo zezinaliti, noma kunjalo zivame ukunikezwa kuphela ngamadayamitha amancane. I-insert ethambile, eqinile ingafakwa kudiski noma esihlalweni lapho kudingeka ukuvala okuphelele.

Ukuhlobisa ivalvu yeglobe

Ukuvalwa kwangempela kwengxenye kuya kwengxenye ku-valve yomhlaba kunikezwa yi-spool. Isihlalo, idiski, isiqu, isihlalo sangemuva, futhi ngezinye izikhathi ihadiwe enamathisela isiqu ku-disc yakha i-trim ye-valve yomhlaba. Ukusebenza okuhle kwanoma iyiphi i-valve kanye nesikhathi sokuphila kuncike ekwakhiweni kwe-trim kanye nokukhetha kwezinto ezibonakalayo, kodwa ama-valve e-globe asengozini enkulu ngenxa yokungqubuzana kwawo okuphezulu koketshezi kanye nemizila yokugeleza eyinkimbinkimbi. Ijubane lawo kanye nokuxokozela kuyakhuphuka njengoba isihlalo ne-disc kusondelana. Ngenxa yemvelo yokugqwala koketshezi kanye nejubane elandayo, kungenzeka ukuthi kulimaze i-trim ye-valve, okuzokwandisa kakhulu ukuvuza kwe-valve uma ivaliwe. I-Stringing yigama lephutha elivela ngezikhathi ezithile njengezinhlayiya ezincane esihlalweni noma ku-disc. Okwaqala njengendlela encane yokuvuza kungakhula futhi kuphenduke ukuvuza okukhulu uma kungalungiswanga ngesikhathi esifanele.

Ipulaki yevalvu kumavalvu amancane e-bronze globe ivame ukwenziwa ngezinto ezifanayo nomzimba, noma ngezinye izikhathi i-alloy eqinile efana ne-bronze. Izinto ezivame kakhulu ze-spool zamavalvu e-cast iron globe yi-bronze. I-IBBM, noma "Umzimba Wensimbi, Ukukhweza Ngethusi," yigama lale trim yensimbi. Kunezinhlobo eziningi zezinto zokuhlobisa ezitholakalayo zamavalvu ensimbi, kodwa ngokuvamile into eyodwa noma ngaphezulu zokuhlobisa zenziwa ngensimbi engagqwali ye-martensitic yochungechunge lwama-400. Ngaphezu kwalokho, kusetshenziswa izinto eziqinile njenge-stellite, izinsimbi ezingagqwali zochungechunge lwama-300, kanye ne-copper-nickel alloys njenge-Monel.

Kunezindlela ezintathu eziyisisekelo zamavalvu omhlaba. Isimo "se-T", esinesiqu esiqondile ekugelezeni kwepayipi, yisona esivame kakhulu.
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Njenge-T-valve, i-engela valve ijikeleza ukugeleza ngaphakathi kwe-valve ngama-degree angu-90, isebenza njengedivayisi yokulawula ukugeleza kanye ne-elbow yepayipi engama-degree angu-90. Ku-“Christmas trees” kawoyela negesi, ama-valve e-angle globe awuhlobo lwe-valve yokugcina elawula ukuphuma esetshenziswa njalo phezu kwama-boiler.
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Umklamo "Y", okuwumklamo wesithathu, uhloselwe ukuqinisa umklamo wokusetshenziswa kokuvula/ukuvala ngenkathi kunciphisa ukugeleza okuguquguqukayo okwenzeka emzimbeni wevalvu yomhlaba. I-bonnet, isiqu, kanye nediski yalolu hlobo lwevalvu yomhlaba kugobile nge-engeli yama-degree angu-30-45 ukwenza umzila wokugeleza uqonde kakhudlwana futhi kunciphise ukungqubuzana koketshezi. Ngenxa yokungqubuzana okunciphile, ivalvu cishe ayinawo umonakalo omkhulu futhi izici zokugeleza kohlelo lwamapayipi ziyathuthuka.