Xa kuthelekiswa neivalve yesango, ivalve yeglowubhu kunye noyilo lwevalve yokukhangela, imbali yevalve yebhola imfutshane kakhulu. Nangona i-patent yokuqala yevalve yebhola yakhutshwa ngo-1871, kuyakuthatha iminyaka engama-85 ukuba ivalve yebhola ibe nempumelelo yorhwebo. I-Polytetrafluoroethylene (PTFE, okanye "iTeflon") yafunyanwa ngexesha lenkqubo yokuyila ibhombu yeathom ngexesha leMfazwe Yehlabathi yesiBini, eya kuba yinto ekhuthaza ukuqala ishishini levalve yebhola. Iivalve zebhola zifumaneka kuzo zonke izinto ukusuka kubhedu ukuya kwintsimbi yekhabhoni kunye nentsimbi engatyiwayo ukuya kwi-zirconium.

Kukho iindidi ezimbini ezisisiseko: iibhola ezidadayo kunye neebhola zetrunnion. Olu yilo lubini luvumela ukwakhiwa kweevalvu zebhola ezisebenzayo ukusuka kwi-¼” ukuya kuma-60” nangaphezulu. Ngokubanzi, uyilo oludadayo lusetyenziselwa iivalvu ezincinci kunye nezisezantsi zoxinzelelo, ngelixa uhlobo lwe-trunnion lusetyenziselwa usetyenziso lwevalvu ephezulu kunye noxinzelelo oluphezulu.

VM SUM21 BALL API 6Divalve yebholaIvalve yebhola ye-API 6D isebenzisa ezi ntlobo zimbini zeevalvu zebhola ngenxa yeendlela zazo zokutywina kunye nendlela amandla olwelo ahamba ngayo ukusuka kumbhobho ukuya kwibhola aze asasazeke kwisitulo sevalve. Kuyilo lwebhola edadayo, ibhola ingena ngokuqinileyo phakathi kwezihlalo ezibini, enye inyuka nomlambo enye ezantsi. Amandla olwelo asebenza ebholeni, eyityhalela kwisihlalo sevalvu esikumzimba wevalvu esezantsi. Kuba ibhola iwugqume wonke umngxuma wokuqukuqela, onke amandla okuqukuqela atyhala ibhola ukuyinyanzela kwisihlalo sevalve. Ukuba ibhola likhulu kakhulu kwaye uxinzelelo lukhulu kakhulu, amandla kwisihlalo sevalve siya kuba sikhulu, kuba i-torque yokusebenza inkulu kakhulu kwaye i-valve ayikwazi ukusebenza.

Iivalvu zebhola ezidadayo zineendlela ezahlukeneyo zomzimba, kodwa eyona idumileyo luhlobo oluneenxalenye ezimbini zokugqibela. Ezinye izitayile zomzimba ziquka iziqwenga ezintathu kunye nokungena okuphezulu. Iivalvu zebhola ezidadayo zenziwe ngokobukhulu ukuya kutsho kuma-24″ kunye namabakala angama-300, kodwa olona luhlu losetyenziso lweevalvu zebhola ezidadayo luhlala lusezantsi kakhulu-ubuninzi bumalunga ne-12″.

Nangona iivalve zebhola ziyilwe ngokuyintloko njenge-on/off okanye “stop” valves, ukongezwa kwezinye iivalve zebhola kunye ne-V-port.ivalve yebholaUyilo luzenza zilungele izicelo ezilawulwayo.

Isitulo se-elastic
I-VM SUM21 IBHOLA Ivalve yebhola eFlenge ivelufa Iivalvu zebhola ezidadayo ezincinci zinokusetyenziswa kwizinto ezininzi ezahlukeneyo, ukusuka kwimibhobho yasekhaya ukuya kwimibhobho equlathe eyona khemikhali ifuna kakhulu. Eyona nto idumileyo yokuhlala kwezi valve lolunye uhlobo lwe-thermoplastic, efana ne-PTFE. Izihlalo zevalve yeTeflon zisebenza kakuhle kuba zithambile ngokwaneleyo ukuba zingatywinwa kakuhle kwiibhola zentsimbi ezipolishiwe, kodwa zomelele ngokwaneleyo ukuba zingavutheli ngaphandle kwevalve. Ezona ngxaki zimbini kwezi zivalo zezitulo zithambileyo kukuba zikrweleka ngokulula (kwaye zinokuvuza), kwaye iqondo lobushushu lilinganiselwe ngaphantsi kwendawo yokunyibilika yesitulo se-thermoplastic-malunga ne-450oF (232oC), ngokuxhomekeke kwisixhobo sokuhlala.

Uphawu lweevalvu zebhola ezilastiki ezininzi ezidadayo kukuba zinokutywinwa ngokufanelekileyo xa kuthe kwakho umlilo obangela ukuba isitulo esikhulu sinyibilike. Oku kubizwa ngokuba luyilo olungatshiyo; inepokotho yesitulo engabambi kuphela isihlalo esilastiki endaweni, kodwa inika indawo yokuhlala yentsimbi ebonelela ngokutywinwa kwenxalenye xa idibana nebhola. Ngokutsho kwe-American Petroleum Institute (API) 607 okanye i-6FA imigangatho yokuvavanya umlilo, i-valve ihlolwe ukuqinisekisa ukuyila kokukhusela umlilo.

Uyilo lweTrunnion
VM SUM21 BALL API 6D trunnion ball valve API 6D trunnion ibhola valve Xa isayizi enkulu kunye noxinzelelo oluphezulu lwevalve yebhola kufuneka, uyilo lujikela kuhlobo lwetrunnion. Umahluko phakathi kwe-trunnion kunye nohlobo olujikelezayo kukuba ibhola ye-trunnion igxininiswe kumzimba oyintloko nge-trunnion ephantsi (intonga yokudibanisa emfutshane) kunye nentonga ephezulu. Kuba ibhola ingenako “ukudada” kwisitulo sevalve ukuze kuvalwe ngenkani, isihlalo sevalve kufuneka sidada phezu kwebhola. Uyilo lwesihlalo se-trunnion lubangela ukuba isihlalo sivuselelwe ngoxinzelelo oluphezulu kunye nokunyanzeliswa kwi-sphere ukuze kutywinwe. Ngenxa yokuba ibhola igxininiswe ngokuqinileyo endaweni, ngaphandle kokujikeleza kwayo kwe-90o, amandla olwelo olungaqhelekanga kunye noxinzelelo aluyi kuyijamisa ibhola kwisihlalo sevalve. Endaweni yoko, amandla asebenza kuphela kwindawo encinci ngaphandle kwesihlalo esidadayo.

I-VM SUM21 IBHOLA Qeda uyilo lwendawo yokungena Isiphelo soyilo lwevalve yebhola yetrunnion ngumzalwana omkhulu onamandla wevalve yebhola edadayo, ngoko inokusingatha imisebenzi emikhulu-uxinzelelo oluphezulu kunye nedayamitha yombhobho omkhulu. Ukuza kuthi ga ngoku, olona setyenziso ludumileyo lweevalvu zebhola ze-trunnion kwiinkonzo zemibhobho.