Ivalvu yebhabhathane ethambileyo kunye netywina eliqinileyo

1. Yintoni umahluko ophambili phakathiivalvu yebhabhathane yotywino oluthambileyokunye nevalvu yebhabhathane eqinileyo?

Izinto zeringi yokutywina zahlukile. Isibini sokutywina sevalvu yebhabhathane etywina kamnandi “yisihlalo sesinyithi + iringi yokutywina engeyonsimbi”, kwaye izinto ezisetyenziswa rhoqo ziquka irabha (EPDM/NBR), i-polytetrafluoroethylene (PTFE), njl.njl., njengoko kubonisiwe kuMfanekiso 01; isibini sokutywina sevalvu yebhabhathane etywina kalukhuni “yintsimbi ukuya kwisinyithi”, kwaye isihlalo sevalvu kunye nomphezulu wokutywina zihlala zenziwe ngentsimbi engagqwaliyo, intsimbi ye-alloy okanye umphezulu we-carbide. Eyokuqala ifezekisa ukutywinwa ngokuguqulwa kwe-elastic kwezinto, ngelixa eyesibini ixhomekeke ekuchwepheni ngokuchanekileyo kunye noxinzelelo oluphakathi ukuze kufezekiswe ukutywinwa.

Umfanekiso 01	Umfanekiso 02

2. Luthini udidi lobushushu olufanelekileyo lwento nganye?

Izitywino ezithambileyo zikhawulelwe kwizinto ezingezizo ezesinyithi: Irabha ye-EPDM ifanelekile kwi -40℃ ~ 120℃, kwaye i-PTFE inokufikelela kwi -40℃ ~ 200℃. Akukho mda unjalo kwizitywino eziqinileyo. Iivalvu zebhabhathane zentsimbi engagqwaliyo eqhelekileyo zifanelekile kwi -40℃ ~ 425℃, kwaye izinto ezikhethekileyo ze-alloy zinokumelana nobushushu obuphezulu obungaphezulu kwama-600℃.

3. Yeyiphi indlela yokutywina engcono?

Itywina elithambileyo lingcono kwaye linokufikelela ekungavuzini nanye (i-ANSI Class VI). Ukuthamba kwerabha/i-PTFE kunokugcwalisa ukungalingani okuncinci kumphezulu wesinyithi kwaye kufikelele ekutywinweni kwinqanaba lebhamuza. Ngenxa yokudibana okuqinileyo kwesinyithi, iimfuno eziqhelekileyo zetywina eziqinileyo zihlala ziyi-ANSI Class IV~V (ukuvuza okuncinci kuvumelekile), okufanelekileyo kwimidiya yenkqubo enokunyamezela okuthile ukuvuza.

4. Yintoni umahluko phakathi kwexesha lenkonzo kunye neendleko zokulungisa?

Izitywino eziqinileyo zihlala ixesha elide. Iringi yerabha/ye-PTFE ethambileyo idla ngokuguga kwaye iguge ngenxa yokuguguleka kwexesha elide kunye nokutshintsha rhoqo. Iringi yokutywina idla ngokufuna ukutshintshwa rhoqo emva kweminyaka emi-2 ukuya kwemi-5. Emva kokuba umphezulu wesinyithi oqinileyo ufakwe i-carbide, awugugi kwaye uyaguguleka, kwaye unobomi benkonzo obungaphezulu kweminyaka eli-10. Ifanelekile ukulungiswa rhoqo kweemeko zokusebenza. Nangona iindleko zokuqala ziphezulu, iindleko zokugcina ixesha elide ziphantsi.

5. Ukuguquguquka kweendaba kwahluka njani?

Itywina elithambileyo alixhathisi kwi-corrosion/particle-containing media enamandla. Nangona irabha kunye ne-PTFE zinozinzo oluhle lweekhemikhali, ukuba i-medium inee-hard particles (ezifana ne-slurry, i-coal powder), ii-particles zinokukrwela ngokulula umphezulu we-sealing othambileyo xa i-valve ivuliwe kwaye ivaliwe, nto leyo ebangela ukuvuza. Ii-hard particles zifanelekile kwiimeko ezinzima zokusebenza ezifana nomphunga oshushu kakhulu, iimveliso zeoyile, ii-slurry ezinee-particles, kunye neegesi ezixineneyo.

6. Isiphelo

Umahluko ophambili phakathi kwetywina elithambileyo kunye netywina eliqinileyo leivalvu yebhabhathaneIlele kwizinto zokutywina: isitywina esithambileyo (irabha/PTFE) sinokuthamba okuhle, asinakuvuza, kwaye sifanelekile kwiindawo ezicocekileyo kubushushu begumbi; isitywina esiqinileyo (ukusuka kwisinyithi ukuya kwisinyithi) simelana nobushushu obuphezulu kwaye asigugi, kwaye sifanelekile kwiimeko zokusebenza ezinzima ezifana nomphunga kunye namasuntswana. Zombini zineengenelo zazo, kwaye ukhetho kufuneka lusekelwe kwiimeko zokusebenza.Tianjin Tanggu Water-Seal Valve Co.,Ltdigxile kwimveliso yeiivalvu zebhabhathane, iivalvu zesango, iivalvu zokujongakunye nezinye iintlobo zeevalvu. Wamkelekile ukuba usitsalele umnxeba kwaye siza kukunika iingcebiso zokukhetha zobungcali!