Ibyuma bifunga amavali: Ni gute watandukanya kandi ugahitamo imyanya ya vali ya PTFE, EPDM, na PFA?

1: Ni irihe tandukaniro ry'ingenzi cyane hagati y'ibikoresho bya PTFE, EPDM na PFA?

PTFE (Polytetrafluoroethylene):Izwi cyane nk'umwami wa pulasitiki, ni ikintu cy'umweru gikomeye gifite ubushobozi bwo kudakora neza mu by'ubushyuhe no kudakoresha imiti (-196℃ ~ + 200℃). Ifite ubushobozi bwo gukururana buke cyane, ariko imiterere yayo ni yoroshye kandi ntirwanya kwangirika no gushyuha cyane.

EPDM (ethylene propylene diene monomer):Umupira w'umukara utemba neza. Akamaro k'ingenzi ni ubudahangarwa bwiza n'amazi ashyushye, umwuka ushyushye, aside na alkali (aside nke na alkali nke) ndetse no kudahangarwa n'ikirere. Ingorane ni uko idahangarwa n'amavuta y'ubutare n'ibinyabutabire bya hydrocarbon.

PFA (resine ya perfluoroalkoxy):PTFE yahinduwe ishobora gushonga. Imikorere yayo isa na PTFE, ariko irwanya ubushyuhe bwinshi iri hejuru (+260°C), kandi ishobora gukorwamo intebe y'ingufu nini ifite ubuso bworoshye binyuze mu gusya inshinge. Irwanya gucika kwayo no kudacika kwayo ni byiza kurusha PTFE.

2: Ku bijyanye no guhuza itangazamakuru, ni ibihe binyabutabire bikwiriye gukoreshwa?

PTFE: Ikoreshwa hafi ya aside zikomeye zose, ishingiro rikomeye, n'ibintu byose bishongesha ibintu, ariko ntikwiriye ibyuma byashongeshejwe bya alkali na gaze ya fluorine ifite ubushyuhe bwinshi.

EPDM:Birakwiriye cyane ku mazi ashyushye, umwuka ushyushye, amavuta ya hydraulic ya fosfeti ester, feri y'amazi, aside nke n'ibice by'ishingiro. Birabujijwe cyane gukoresha amavuta ashingiye kuri peteroli (lisansi, mazutu), toluene, na aside nyinshi.

PFA:Ifite ubushobozi bwose bwo kurwanya ingese bwa PTFE kandi irahamye cyane iyo ubushyuhe n'umuvuduko mwinshi bikabije. Ikwiriye cyane cyane imiti isukuye cyane (nk'aside sulfurike na aside nitrike ikoreshwa mu nganda za semiconductor).

3: Ni gute wahitamo hagati y'ibikoresho bitatu ukurikije imiterere ifatika?

Gufunga:EPDM > PTFE ≈ PFA. Rubber ifite ubushobozi bwo guhindura ibintu mu buryo buhamye kandi ishobora kwihanganira gushwanyagurika ku ntebe y'agatebe ka valve; PTFE/PFA isaba imbaraga nyinshi zo kuyifunga mbere.

Ubudahangarwa bw'ubushyuhe: PFA (+260℃) > PTFE (+200℃) > EPDM (ubusanzwe +120℃, formula yihariye +150℃).

Ubudahangarwa bwo kwambara:PFA > PTFE > EPDM. Ibikoresho birimo uduce duto bizahita byangiza intebe ya valve ya EPDM, bigatuma switch ihagarara.

Ibisabwa ku torque:PTFE/PFA ifite ubushobozi bwo gukururana buke n'ubushobozi bwo gusimbuza buke. EPDM ifite ubushobozi bwo gukururana buke, bigatuma gufungura no gufunga valve bigorana cyane.

4: Ni gute wafata ibyemezo byihuse byo guhitamo ukurikije imiterere y'akazi?

Intambwe ya 1:Reba niba icyo gikoresho kirimo amavuta. Niba ari amavuta y'ubutare cyangwa amavuta ya lisansi, shyiramo EPDM hanyuma uhitemo PTFE cyangwa PFA.

Intambwe ya 2:Genzura ubushyuhe buri hagati n'isuku. Ku bushyuhe bwinshi (>150°C) cyangwa imyuka inyuramo cyane (nka chlorine), PFA ni yo nziza. Niba ubushyuhe butari hejuru (<120℃) kandi ari amazi, umwuka cyangwa umwuka, EPDM ni yo mahitamo meza kandi ahendutse.

Intambwe ya 3:Reba niba hari uduce duto cyangwa guhinduranya kenshi. Niba bikunze guhindurwa cyangwa birimo uduce duto, hitamo PFA. Gukata rimwe gusa nta duce duto, PTFE y'inyongera.

5: Ese hari ibikoresho "bisanzwe"?

Oya. Niba ukeneye kwihanganira ubushyuhe bwinshi, ingese ikomeye n'amavuta icyarimwe, PFA ni yo ya mbere, ariko irahenze (ikubye inshuro 3-5 ugereranyije na PTFE) kandi ubushobozi bwayo bwo gufunga ntabwo ari bwiza nk'ubwa rabha. Iyo igikoresho kidakoresha amavuta kandi ubushyuhe butari hejuru, EPDM ni yo ihendutse cyane. Amahitamo rusange yo kwirinda ni PTFE.

6: Incamake

Guhitamo ibikoresho byo gufunga neza bishobora kongera igihe cy'ubuzima bwa valve.Tianjin Tanggu Amazi-Ikidodo Valve Co, Ltd.– inzobere mu gukoravalve z'ibinyugunyugu, valve zo mu irembo, navalve zo kugenzura, kandi ifite ubuhanga mu gutunganya ibikoresho byo gufunga nka PTFE, EPDM, na PFA. Ntidukora valves "zisanzwe", ariko twiyemeje gutanga uburyo bwo gufunga burambye kandi buhendutse kuri buri muyoboro wawe. Niba ufite ikibazo ku bijyanye no guhitamo,TWSitsinda ry'abatekinisiye ryiteguye gusuzuma neza uko umutima wawe uhagaze.