Isihlalo se-Butterfly valvekuyingxenye ekhiphekayo ngaphakathi kwe-valve, indima eyinhloko ukusekela ipuleti le-valve livuleke ngokugcwele noma livaleke ngokugcwele, futhi kwakha i-vice yokuvala.Ngokuvamile, ububanzi besihlalo bulingana nobukhulu be-valve.Izinto zesihlalo se-Butterfly valve zibanzi kakhulu, izinto ezivame ukusetshenziswa ziyi-EPDM ethambile, i-NBR, i-PTFE, kanye nensimbi eqinile evala uphawu ye-carbide.Okulandelayo sizokwethula ngamunye ngamunye.
1.EPDM-Uma kuqhathaniswa nenye irabha yenhloso evamile, irabha ye-EPDM inezinzuzo ezinhle, ezibonakala ikakhulukazi ku:
A. Ibiza kakhulu, kubhanana osetshenziswa kakhulu, uphawu lwenjoloba eluhlaza lwe-EPDM lulula kakhulu, ungenza ukugcwalisa okuningi, unciphise izindleko zenjoloba.
B. Ukumelana nokuguga kwe-EPDM, ukumelana nokuchayeka elangeni, ukumelana nokushisa, ukumelana nomhwamuko wamanzi, ukumelana nemisebe, kulungele i-asidi ebuthakathaka kanye nemidiya ye-alkali, izakhiwo ezinhle zokuvikela.
C. Ibanga lokushisa, eliphansi kakhulu lingaba -40 ° C - 60 ° C, lingaba yizimo zokushisa ezingu-130 ° C zokusetshenziswa isikhathi eside.
I-2.NBR-imelana nowoyela, ukumelana nokushisa, ukumelana nokugqoka futhi ngesikhathi esifanayo inokumelana okuhle kwamanzi, ukuvalwa komoya kanye nezakhiwo ezinhle kakhulu zokubopha.Izicelo ezengeziwe epayipini likawoyela, ububi ukuthi alimelani namazinga okushisa aphansi, ukumelana ne-ozone, izakhiwo ezingezinhle zokufaka uwoyela, ukunwebeka nakho kujwayelekile.
3. PTFE: ipulasitiki fluorine, le nto inokumelana okuqinile ne-asidi ne-alkali, kang ukusebenza okuhlukahlukene kwezincibilikisi eziphilayo, kuyilapho impahla ishisa ukumelana nokushisa, ingasetshenziswa ngokuqhubekayo ku-260 ℃, izinga lokushisa eliphakeme kakhulu lingafinyelela ku-290-320 ℃ , i-PTFE ivele, ixazulule ngempumelelo imboni yamakhemikhali, i-petroleum, i-pharmaceutical kanye nezinye izimboni emkhakheni wezinkinga eziningi.
4. I-Metal hard seal (i-carbide): impahla yesihlalo se-valve yensimbi eqinile inokumelana okuhle kakhulu nokushisa okuphezulu nokucindezela okuphezulu, ukumelana nokugqwala, izici zokumelana nokugqoka, kuhle kakhulu ukwenza ukukhubazeka kwento ethambile yokuvala uphawu ayimelani izinga lokushisa eliphezulu nomfutho ophakeme, kodwa impahla yophawu oluqinile ezidingweni zokucubungula inqubo iphezulu kakhulu, okuwukuphela kokubi kokusebenza kokuvala isihlalo se-valve yensimbi eqinile ayilungile, kuzoba isikhathi eside ngemuva kokusebenza komsebenzi we ukuvuza.