Ukwaziswa kwezinto zokutywina iivalvu—iTWS Valve

Izinto zokutywina iivalvu ziyinxalenye ebalulekileyo yokutywina iivalvu. Zithini izinto zokutywina iivalvu? Siyazi ukuba izinto zokutywina iivalvu zahlulwe zibe ziindidi ezimbini: isinyithi kunye nesingasisinyithi. Oku kulandelayo yintshayelelo emfutshane kwiimeko zokusetyenziswa kwezinto ezahlukeneyo zokutywina, kunye neentlobo zeevalvu ezisetyenziswa rhoqo.

1. Irabha yokwenziwa

Iimpawu ezipheleleyo zerabha yokwenziwa ezifana nokuxhathisa ioyile, ukumelana nobushushu kunye nokuxhathisa ukugqwala zingcono kunezo zerabha yendalo. Ngokubanzi, ubushushu bokusetyenziswa ngerabha yokwenziwa yi-t≤150℃, kwaye ubushushu berabha yendalo yi-t≤60℃. Irabha isetyenziselwa ukuvala iivalvu zeglobe,ivalvu yesango ehleli ngerabha, iivalvu zediaphragm,rivalvu yebhabhathane ehleli phantsi kwe-ubber, rivalvu yokujonga i-swing ehleli phantsi kwe-ubber (iivalvu zokujonga), iivalvu zokuncinza kunye nezinye iivalvu ezine-nominal pressure PN≤1MPa.

2. Inayiloni

I-nylon ineempawu zomlinganiselo omncinci wokungqubana kunye nokumelana okuhle nokugqwala. I-nylon isetyenziswa kakhulu kwiivalvu zebhola kunye neevalvu zeglobe ezinobushushu obuyi-t≤90℃ kunye noxinzelelo oluqhelekileyo lwe-PN≤32MPa.

3. I-PTFE

I-PTFE isetyenziswa kakhulu kwiivalvu zeglobe,iivalvu zesango, iivalvu zebhola, njl. ezinobushushu obuyi-t≤232℃ kunye noxinzelelo oluqhelekileyo lwe-PN≤6.4MPa.

4. Isinyithi esenziwe ngentsimbi

Isinyithi esibunjiweyo sisetyenziselwaivalvu yesango, ivalvu yeglobhu, ivalvu yeplagi, njl. yobushushu obuyi-t≤100℃, uxinzelelo oluqhelekileyo lwe-PN≤1.6MPa, igesi kunye neoyile.

5. Ingxubevange yeBabbitt

I-Babbitt alloy isetyenziselwa ivalvu yeglobe ye-ammonia enobushushu obuyi-t-70~150℃ kunye noxinzelelo oluqhelekileyo lwe-PN≤2.5MPa.

6. Ingxubevange yobhedu

Izinto eziqhelekileyo kwii-alloys zekopolo yi-6-6-3 tin bronze kunye ne-58-2-2 manganese brass. I-Copper alloy inokumelana nokuguguleka okuhle kwaye ifanelekile emanzini nasemoyeni ngobushushu obuyi-t≤200℃ kunye noxinzelelo oluqhelekileyo lwe-PN≤1.6MPa. Ihlala isetyenziswa kwiiivalvu zesango, iivalvu zeglobhu,iivalvu zokujonga, iivalvu zeplagi, njl.njl.

7. Intsimbi engenasici yeChrome

Iindidi ezisetyenziswa kakhulu ze-chromium stainless steel yi-2Cr13 kunye ne-3Cr13, ezicinyiweyo zaza zaqiniswa, kwaye zinokumelana okuhle nokugqwala. Ihlala isetyenziswa kwiivalvu zemidiya efana namanzi, umphunga kunye nepetroleum enobushushu obuyi-t≤450℃ kunye noxinzelelo oluqhelekileyo lwe-PN≤32MPa.

8. Intsimbi engenasici yeChromium-nickel-titanium

Uhlobo oluqhelekileyo olusetyenziswayo lwentsimbi engagqwaliyo ye-chromium-nickel-titanium yi-1Cr18Ni9ti, enokumelana nokugqwala okuhle, ukumelana nokukhukuliseka kunye nokumelana nobushushu. Ifanelekile kwi-steam, i-nitric acid kunye nezinye izinto ezinobushushu obuyi-t≤600℃ kunye noxinzelelo oluqhelekileyo lwe-PN≤6.4MPa, esetyenziselwa i-globe valve, i-ball valve, njl.njl.

9. Intsimbi ene-nitride

Uhlobo oluqhelekileyo olusetyenziswayo lwentsimbi ene-nitride yi-38CrMoAlA, enokumelana nokugqwala okuhle kunye nokumelana nokukrwela emva konyango lwe-carburizing. Isetyenziswa rhoqo kwivalvu yesango lesitishi samandla enobushushu obuyi-t≤540℃ kunye noxinzelelo oluqhelekileyo lwe-PN≤10MPa.

10. Ukubhoroniza

I-Boronizing isebenza ngokuthe ngqo kumphezulu wokutywina kwizinto zomzimba wevalvu okanye umzimba wediski, ize emva koko yenze unyango lomphezulu we-boronizing, umphezulu wokutywina unokumelana nokuguguleka okuhle. Isetyenziswa kwivalvu yokutsalwa kwesikhululo samandla.