Incwadi yokuSebenza noLondolozo–IiValufa zeSango

3. UGcino kunye noLondolozo kunye noFakelo kunye nokusebenza
3.1 Ukugcinwa kunye noLondolozo
3.1.1 Iivalvu kufuneka zigcinwe kwimeko yangaphakathi.Iziphelo zomgodi kufuneka zigqunywe ngeplagi.
3.1.2 Ukuhlolwa kwamaxesha athile kunye nokucocwa kuyafuneka kwiivalvu ezigcinwe ixesha elide, ngakumbi xa kucocwa umphezulu.Akukho monakalo uvumelekileyo.Ukugquma kwe-oyile kuceliwe ukunqanda umhlwa kwindawo yomatshini.
3.1.3 Ngokumalunga nokugcinwa kwevalve ngaphezulu kweenyanga ezili-18, iimvavanyo ziyafuneka phambi kofakelo lwevalvu kwaye urekhode iziphumo.
3.1.4 Iivalvu kufuneka zihlolwe ngamaxesha athile kwaye zigcinwe emva kokufakwa.Amanqaku aphambili anjengala alandelayo:
1) Umphezulu wokutywina
2) Isiqu kunye ne-Stem nut
3）Ukupakisha
4) Ukucocwa komphezulu wangaphakathi woMzimba kunye neBonnet.
3.2 Ukufakela
3.2.1 Qwalasela kwakhona iimpawu zevalvu (uHlobo, iDN, uHlelo, iMaterial) ezihambelanayo nokuphawulwa okucelwe sisixokelelwano semibhobho.
3.2.2 Ukucocwa ngokupheleleyo komphandle nomphezulu wokutywina uyacelwa phambi kofakelo lwevalvu.
3.2.3 Qinisekisa ukuba iibholithi ziqinile phambi kokufakwa.
3.2.4 Qinisekisa ukuba ukupakishwa kuqinile phambi kokufakwa.Nangona kunjalo, akufanele iphazamise ukuhamba kwe-stem.
3.2.5 Indawo yevalvu kufuneka ilungele ukuhlolwa nokusebenza.Ukuthe tyaba ukuya kumbhobho kuyakhethwa.Gcina ivili lesandla phezulu kunye nesiqu nkqo.
3.2.6 Kwivalve yokuvala, ayifanelekanga ukufakwa kwimeko yokusebenza yoxinzelelo oluphezulu.Isiqu kufuneka siphetshwe ukuba sonakaliswe.
3.2.7 Kwivalve ye-Socket welding, ingqwalaselo iyacelwa ngexesha lokudityaniswa kwevalvu ngolu hlobo lulandelayo:
1) IWelder kufuneka iqinisekiswe.
2) Ipharamitha yenkqubo yokuwelda kufuneka ihambelane nesatifikethi somgangatho wezinto zokuwelda.
3) Izinto zokuzalisa umgca we-welding, ukusebenza kweekhemikhali kunye noomatshini kunye ne-anti-corrosion kufuneka kufane nezinto zomzali womzimba.
3.2.8 Ufakelo lwevalvu kufuneka luthintele uxinzelelo oluphezulu olusuka kwiziqhoboshi okanye kwimibhobho.
3.2.9 Emva kofakelo, iivalvu kufuneka zivuleke ngexesha lovavanyo loxinzelelo lombhobho.
3.2.10 Indawo yeNkxaso: ukuba umbhobho womelele ngokwaneleyo ukuxhasa ubunzima be-valve kunye ne-torque yokusebenza, indawo yokuxhasa ayicelwa.Kungenjalo iyafuneka.
3.2.11 Ukuphakamisa: Ukuphakamisa ivili ngesandla akuvumelekanga kwiivalvu.
3.3 Ukusebenza kunye nokusetyenziswa
3.3.1 Iivalvu zesango kufuneka zivuleke okanye zivalwe ngokupheleleyo ngexesha lokusetyenziswa ukunqanda umsesane wokutywina wesitulo kunye nomphezulu wediski obangelwa sisantya esiphezulu.Abanakumangalelwa ngolawulo lokuhamba.
3.3.2 Ivili lesandla kufuneka lisetyenziswe endaweni yezinye izixhobo zokuvula okanye zokuvala iivalvu
3.3.3 Ngexesha lobushushu benkonzo evumelekileyo, uxinzelelo olukhawulezileyo kufuneka lube ngaphantsi kunoxinzelelo olulinganisiweyo ngokwe ASME B16.34
3.3.4 Akukho monakalo okanye ugwayimbo oluvunyelweyo ngexesha lothutho lwevalvu, ukufakwa kunye nokusebenza.
3.3.5 Umlinganiselo wesixhobo sokukhangela ukuhamba okungazinzanga siyacelwa ukuba silawule kwaye sisuse into yokubola ukuthintela ukonakala kwevalvu kunye nokuvuza.
3.3.6 Ukuxinana okubandayo kuya kuba nefuthe ekusebenzeni kwevalvu, kwaye izixhobo zokulinganisa kufuneka zisetyenziswe ukunciphisa ubushushu bokuhamba okanye ukubuyisela isivalo.
3.3.7 Kulwelo oluzitshisayo, sebenzisa izixhobo zokulinganisa ezifanelekileyo ukuqinisekisa ukuba indawo engqongileyo kunye noxinzelelo olusebenzayo alugqithi kwindawo yalo yokuzitshisa (ingakumbi qaphela ukukhanya kwelanga okanye umlilo wangaphandle).
3.3.8 Kwimeko yolwelo oluyingozi, olufana neziqhushumbisi, ezinokutsha, ezinetyhefu, iimveliso ze-oxidation, akuvumelekanga ukutshintsha ukupakisha phantsi koxinzelelo.Nangona kunjalo, kwimeko yongxamiseko, akukhuthazwa ukuba utshintshe ukupakisha phantsi koxinzelelo (nangona i-valve inomsebenzi onjalo).
3.3.9 Qinisekisa ukuba ulwelo alungcolanga, nto leyo echaphazela ukusebenza kwevalvu, ingabandakanyi izinto eziqinileyo, kungenjalo kufuneka kusetyenziswe izixhobo ezifanelekileyo zokulinganisa ukukhupha ubumdaka kunye nezinto eziqinileyo, okanye endaweni yazo kufakwe olunye uhlobo lwesivalo.
3.3.10 Ubushushu bokusebenza obusebenzayo.

3.3.11 Qinisekisa imathiriyeli yomzimba wevalvu ikulungele ukusetyenziswa kwindawo ekwaziyo ukumelana nomhlwa kunye nokuthintela okusingqongileyo okunolwelo.

3.3.12 Ngexesha lenkonzo, khangela ukusebenza kokutywinwa ngokwetheyibhile engezantsi:

3.3.13 Qwalasela ukunxitywa kwentlawulo yokuhlala, ukupakisha ukuguga kunye nomonakalo.
3.3.14 Emva kokulungiswa, phinda udibanise kwaye ulungelelanise ivalve, emva koko uvavanye ukusebenza kokuqina kwaye wenze iirekhodi.