Ku pfariwa ka valve i xiphemu xa nkoka xa valve hinkwayo, xikongomelo xa yona lexikulu i ku sivela ku vupfa, .valve ya konasealing seat yitlhela yivuriwa sealing ring, i nhlangano lowu hlanganaka hiku kongoma na medium eka pipeline naswona wu sivela medium ku khuluka. Loko valve yitirhisiwa, kuna switirhisiwa swohambana hambana eka phayiphi, kufana na mati, gasi, oyili, switirhisiwa swo bola, na swin’wana, naswona swisirhelelo swa ti valve tohambana hambana switirhisiwa eka tindzhawu tohambana hambana naswona swinga pfumelelana na switirhisiwa swohambana hambana.
TWSValveyiku tsundzuxa leswaku switirhisiwa swa ti valve seals swinga avanyisiwa hi swiyenge swimbirhi, kunga switirhisiwa swa nsimbi na switirhisiwa leswinga riki swa nsimbi. Swisirhelelo leswinga riki swa nsimbi hi xitalo switirhisiwa eka tiphayiphi eka mahiselo na ntshikelelo wa ntolovelo, kasi swisirhelelo swa nsimbi swina switirhisiwa swotala naswona swinga tirhisiwa eka mahiselo yale henhla. ntshikelelo wa le henhla.
Raba ya synthetic ya antswa kutlula rhaba ya ntumbuluko hi tlhelo ra ku tiya ka oyili, ku tiya ka mahiselo xikan’we naku lwisana na corrosion. Hi ntolovelo, mahiselo yo tirha ya rhaba yo endliwa i t≤150. 150°C, rhaba ya ntumbuluko i t≤60°C, naswona rhaba yi tirhisiwa ku pfalela ti globe valves, ti gate valves, ti diaphragm valves, ti butterfly valves, ti check valves, ti pinch valves na ti valve tin’wana letingana ntshikelelo wa vito PN≤1MPa.
2. Nayiloni
Nylon yina swihlawulekisi swa friction coefficient leyintsongo xikan’we naku tiya ka kahle eka corrosion. Nylon yitirhisiwa ngopfu eka ti ball valves na ti globe valves letingana mahiselo t≤90°C na ntshikelelo wa vito PN≤32MPa.
3. Polytetrafluoroethylene ya xirhendzevutani
PTFE yi tirhisiwa ngopfu eka ti globe valves, ti gate valves, ti ball valves, na swin’wana na swin’wana leswingana mahiselo ya t≤232. 232°C na ntshikelelo wa vito PN≤6.4MPa.
4. Nsimbi leyi hoxiweke
Cast iron yitirhisiwa eka ti gate valves, ti globe valves, ti plug valves, na swin’wana na swin’wana eka mahiselo t≤100. 100°C, ntshikelelo wa vito PN≤1.6MPa, gasi na oyili.
5. Xihlanganisi xa Babbitt
Babbitt alloy yitirhisiwa eka ammonia globe valve leyingana mahiselo ya t-70~150°Cna ntshikelelo wa vito PN≤2.5MPa.
6. Xihlanganisi xa koporo
Switirhisiwa leswi tirhisiwaka ngopfu eka ti copper alloys i 6-6-3 tin bronze na 58-2-2 manganese brass. Copper alloy yina ku tiya ka kahle ka ku onha naswona yi lulamerile eka mati na steam na mahiselo ya t≤200°Cna ntshikelelo wa vito PN≤1.6MPa. Yitala kutirhisiwa eka ti gate valves, ti globe valves, ti check valves, ti plug valves, na swin’wana.
7. Chrome ya nsimbi leyi nga riki na swilo swo bola
Ti grade leti tirhisiwaka ngopfu ta chromium stainless steel i 2Cr13 na 3Cr13, letinga timiwa naku titimela, naswona tina ku tiya ka kahle eka corrosion. Yitala kutirhisiwa eka ti valve ta mati, steam na petroleum letingana mahiselo t≤450°Cna ntshikelelo wa vito PN≤32MPa.
8. Chrome-nickel-titanium nsimbi leyi nga riki na swilo swo bola
Giredi leyi tirhisiwaka ngopfu ya chromium-nickel-titanium stainless steel i 1Cr18Ni9ti, leyingana ku tiya ka kahle ka corrosion, ku tiya ka erosion xikan’we naku lwisana na kuhisa. Yi lulamerile eka steam na swin’wana swa switirhisiwa leswingana mahiselo ya t≤600°C na ntshikelelo wa vito PN≤6.4MPa, naswona yi tirhisiwa eka ti globe valve, ti ball valve, na swin’wana.
9. Nsimbi ya nitriding
Giredi leyi tirhisiwaka ngopfu ya nsimbi ya nitriding i 38CrMoAlA, leyingana ku tiya ka kahle ka corrosion xikan’we naku lwisana na scratch endzhaku ka vutshunguri bya carburizing. Yitala kutirhisiwa eka ti valve ta gede ya xitichi xa gezi letingana mahiselo t≤540°Cna ntshikelelo wa vito PN≤10MPa.
10. Ku boroniza
Boronizing yi lulamisa hiku kongoma ndzhawu yo pfalela kusuka eka swilo swa miri wa valve kumbe miri wa disc, kutani yi endla vutshunguri bya boronizing surface. Vuandlalo byo pfalela byina ku tiya ka kahle ka ku onhaka. Eka valve yo pfurha ya xitichi xa gezi.
Loko valve yi tirhisiwa, timhaka leti faneleke ku tekeriwa enhlokweni hi leti landzelaka:
1. Matirhelo yo pfalela ya valve ya fanele ku kamberiwa ku tiyisisa matirhelo ya yona.
2. Languta loko xiphemu xo pfalela xa valve xi onhakile, naswona u lunghisa kumbe ku xi cinca hi ku ya hi xiyimo.
Nkarhi wa poso: Jan-04-2023
