Ithini i-CV (i-flow coefficient) yamavalvu embulunga

Iyini i-coefficient yokugeleza kwe-valve yeglobu

I-flow coefficient (inani le-Cv) yevalvu yeglobhu ngokuvamile iphakathi kokumbalwa namashumi, futhi inani elithile liyahlukahluka kuye ngokuthi ububanzi be-valve, ukwakheka, uhlobo lomgogodla we-valve, impahla yesihlalo se-valve kanye nokunemba kokucubungula. Okulandelayo ububanzi obulinganiselwe ezimweni ezivamile:

1. Ngobubanzi obujwayelekile

I-valve yembulunga encane enobubanzi obuncane: Inani le-Cv levalvu yembulunga enobubanzi obuncane enobubanzi obuncane obuphakathi kuka-1/2 Intshi (DN15) kanye no-2 Intshi (DN50) ngokuvamile iphakathi kuka-2.5 no-20. Ngokwesibonelo, inani le-Cv levalvu yeglowubu engu-1/2 Intshi (DN15) ingase ibe phakathi kuka-2.5 kuya ku-4 ivelu engu-2 yeglobu engu-5, i-valve engu-2 ye-C. 6 kuya ku-10, futhi inani le-Cv levalvu yeglobu engu-2 Intshi (DN50) lingase libe phakathi kuka-12 no-20.

Ivalvu yembulunga enobubanzi obumaphakathi: Kumavalvu eglobhu anobubanzi obumaphakathi anobubanzi obungu-2-1/2 Intshi (DN65) ukuya ku-6 Intshi (DN150), inani le-Cv ngokuvamile liphakathi kuka-20 no-60. Isibonelo, inani le-Cv leglobhu engu-2-1/2 Intshi (DN65) ivelufu lingase libe phakathi kuka-20 kanye nevelu engu-Iv0 engu-30 yeglobu engu-30 D iveluvu ingase ibe phakathi kuka-35 no-50, futhi inani le-Cv levalvu yembulunga engu-6 Intshi (DN150) lingase libe phakathi kuka-45 no-60.

I-valve enkulu ye-diameter yeglobe: Amavalvu eglobhu anobubanzi obukhulu anobubanzi obujwayelekile obungaphezu kuka-6 Intshi (DN150) anamanani amakhulu uma kuqhathaniswa e-Cv, ngokuvamile angaphezu kuka-60 kuya ku-100. Isibonelo, inani le-Cv levalvu yeglowubu engu-8 Intshi (DN200) lingase libe phakathi kuka-80 no-100, futhi inani le-Cv lingase libe phakathi kwevalve engu-000 ye-D 1N2 futhi 150 noma ngaphezulu.

2. Ngesakhiwo sesakhiwo

Iqonde ngevalvu yembulunga: Inani le-Cv liphezulu uma kuqhathaniswa, ngokuvamile lisezingeni eliphakathi phakathi kwamavalvu embulunga anobubanzi obufanayo. Isibonelo, inani le-Cv levalvu yembulunga eqondile ye-DN50 licishe libe ngu-10 kuye ku-15, futhi inani le-Cv levalvu yembulunga eqondile ye-DN100 lingase libe ngu-30 kuye ku-40.

I-Angle globe valve: Ngenxa yokuthi indlela yayo yokugeleza imbi kakhulu futhi ukumelana noketshezi kukhulu uma kuqhathaniswa, inani le-Cv liphansi kancane kunalelo levalvu yembulunga eqondile. Inani le-Cv levalvu yeglobu ye-engeli ye-DN50 lingase libe phakathi kuka-8 kuya ku-12, futhi inani le-Cv le-valve ye-engeli ye-DN100 licishe libe ngu-25 kuya ku-35.

3. Nge-valve core uhlobo

I-valve ye-flat core globe valve: Inani le-Cv liphezulu uma kuqhathaniswa, isibonelo, inani le-Cv le-DN100 ivalve ewumgogodla we-valve yeglobhu ingase ibe ngu-40 kuya ku-50.

I-valve ye-conical core globe valve: Ngenxa yokuxhumana okuseduze phakathi kwe-valve core kanye nesihlalo se-valve, ukusebenza kokuvala kungcono, kodwa ukumelana noketshezi kukhulu kakhulu, futhi inani le-Cv liphansi kakhulu. Ivelu ye-Cv ye-DN100 yevalvu eyi-conical valve globe ingase ibe phakathi kuka-30 no-40.

4. Ngokusho kwempahla yesihlalo se-valve kanye nokunemba kokucubungula

I-valve yesihlalo se-valve yensimbi ye-globe: Isihlalo se-valve yensimbi sinokuqina okuphezulu nokumelana okuhle kokugqoka, kodwa izidingo zokunemba kokucubungula ziphezulu. Uma ukunemba kokucubungula kuphezulu, inani le-Cv lingafinyelela izinga eliphakeme lohlobo olufanayo lwe-valve; uma ukunemba kokucubungula kunganele, indawo yokuvala ingase ingalingani futhi inani le-Cv lizoncishiswa. Isibonelo, inani le-Cv le-DN80 yesihlalo se-valve yesihlalo sevalvu yensimbi enokucubungula okuphezulu ingase ibe phakathi kuka-30 no-35, futhi inani le-Cv lokunemba kokucubungula okuvamile lingase libe phakathi kuka-25 no-30.

I-valve yesihlalo se-valve ethambile: Uma izinto ezithambile ezifana ne-polytetrafluoroethylene zisetshenziswa njengezihlalo zamavalvu, ukusebenza kokuvala kuhle, kodwa izinto ezithambile zingakhubaza ngaphansi kwezinga lokushisa eliphezulu noma ukucindezela okuphezulu, okuthinta i-coefficient yokugeleza. Ivalvu yembulunga ehlezi ethambile ye-DN65 ingase ibe nenani le-Cv elingama-20 kuye ku-25.

Isifinyezo

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