Iyini i-CV (i-flow coefficient) yama-globe valves

Iyini i-coefficient yokugeleza kwe-valve yomhlaba

I-flow coefficient (inani le-Cv) ye-globe valve ivame ukuba phakathi kwamanani ambalwa namashumi, futhi inani elithile liyahlukahluka kuye ngobubanzi obujwayelekile be-valve, isakhiwo, uhlobo lwe-valve core, izinto zesihlalo se-valve kanye nokunemba kokucubungula. Okulandelayo amanye amabanga alinganiselwa ezimweni ezivamile:

1. Ngobubanzi obujwayelekile

I-valve yembulunga encane enobubanzi: Inani le-Cv levalvu yeglobhu encane enobubanzi obuphakathi kuka-1/2 Inch (DN15) no-2 Inch (DN50) ngokuvamile liphakathi kuka-2.5 no-20. Isibonelo, inani le-Cv levalvu yeglobhu engu-1/2 Inch (DN15) lingaba cishe ngu-2.5 kuya ku-4, inani le-Cv levalvu yeglobhu engu-1 Inch (DN25) lingaba ngu-6 kuya ku-10, kanti inani le-Cv levalvu yeglobhu engu-2 Inch (DN50) lingaba phakathi kuka-12 no-20.

Ivalvu yembulunga enobubanzi obuphakathi: Kuma-globe valve anobubanzi obuphakathi nendawo anobubanzi obungu-2-1/2 Inch (DN65) kuya ku-6 Inch (DN150), inani le-Cv livame ukuba phakathi kuka-20 no-60. Isibonelo, inani le-Cv le-globe valve engu-2-1/2 Inch (DN65) lingaba phakathi kuka-20 no-30, inani le-Cv le-globe valve engu-4 Inch (DN100) lingaba phakathi kuka-35 no-50, kanti inani le-Cv le-globe valve engu-6 Inch (DN150) lingaba phakathi kuka-45 no-60.

I-valve enkulu yembulunga enobubanzi obukhulu: Amavalvu amakhulu embulunga anobubanzi obukhulu kuno-6 Inch (DN150) anamanani amakhulu e-Cv, ngokuvamile angaphezu kuka-60 kuya ku-100. Isibonelo, inani le-Cv levalvu yembulunga engu-8 Inch (DN200) lingaba phakathi kuka-80 no-100, kanti inani le-Cv levalvu yembulunga engu-12 Inch (DN300) lingaba phakathi kuka-120 no-150 noma ngaphezulu.

2. Ngesimo sesakhiwo

I-valve yomhlabathi eqondile: Inani le-Cv liphezulu kakhulu, ngokuvamile lisezingeni eliphakathi phakathi kwama-globe valve anobubanzi obufanayo. Isibonelo, inani le-Cv le-DN50 straight-through globe valve cishe liyi-10 kuya ku-15, kanti inani le-Cv le-DN100 straight-through globe valve lingaba ngu-30 kuya ku-40.

I-valve yembulunga ye-engela: Ngenxa yokuthi indlela yayo yokugeleza iguquguquka futhi ukumelana koketshezi kukhulu kakhulu, inani le-Cv liphansi kancane kunele-valve yeglobe eqondile. Inani le-Cv le-valve yeglobe ye-DN50 angle lingaba ngu-8 kuya ku-12, kanti inani le-Cv le-valve yeglobe ye-angle ye-DN100 angle lingaba ngu-25 kuya ku-35.

3. Ngohlobo lwe-valve core

I-valve yomhlaba wonke ye-flat valve core: Inani le-Cv liphezulu kakhulu, isibonelo, inani le-Cv le-valve ye-DN100 flat valve core globe lingaba ngu-40 kuya ku-50.

I-valve yomhlaba wonke ye-valve eyindilinga: Ngenxa yokuxhumana okuseduze phakathi kwe-valve core nesihlalo se-valve, ukusebenza kokuvala kungcono, kodwa ukumelana koketshezi kukhulu kakhulu, kanti inani le-Cv liphansi kakhulu. Inani le-Cv le-DN100 conical valve core globe valve lingaba phakathi kuka-30 no-40.

4. Ngokusho kwezinto zesihlalo se-valve kanye nokunemba kokucubungula

Ivalvu yesihlalo se-valve yensimbi: Isihlalo se-valve yensimbi sinobunzima obukhulu kanye nokumelana okuhle nokuguguleka, kodwa izidingo zokunemba kokucubungula ziphakeme. Uma ukunemba kokucubungula kuphezulu, inani le-Cv lingafinyelela ezingeni eliphakeme lohlobo olufanayo lwe-valve; uma ukunemba kokucubungula kunganele, indawo yokuvala ingase ingalingani futhi inani le-Cv lizoncishiswa. Isibonelo, inani le-Cv le-valve ye-globe yesihlalo se-valve yensimbi ye-DN80 enokucubungula okunembile okuphezulu lingaba phakathi kuka-30 no-35, kanti inani le-Cv lokunemba kokucubungula okujwayelekile lingaba phakathi kuka-25 no-30.

I-valve yesihlalo se-valve ethambileUma izinto ezithambile ezifana ne-polytetrafluoroethylene zisetshenziswa njengezihlalo zamavalvu, ukusebenza kokuvala kuhle, kodwa izinto ezithambile zingase ziguge ngaphansi kokushisa okuphezulu noma ukucindezela okuphezulu, okuthinta i-flow coefficient. Ivalvu yeglobe ehlala phansi ethambile ye-DN65 ingaba nenani le-Cv elicishe libe ngu-20 kuya ku-25.

Isifinyezo

I-globe valve iyithuluzi elibalulekile lokulawula ukugeleza. I-flow coefficient yayo iyipharamitha ebalulekile echaza umthamo wayo wokugeleza futhi idinga ukubalwa nokukhethwa ngokufanele. Ukuqonda izici ezithinta i-flow coefficient kungasiza ekukhetheni i-globe valve efanele ukuqinisekisa ukusebenza okuvamile kwesistimu.