Zeziphi izinto zokutywina ezisetyenziswa rhoqo kwiivalvu?

Kukho iintlobo ezininzi zeevalvu, kodwa umsebenzi osisiseko uyafana, oko kukuthi, ukudibanisa okanye ukunqumla ukuhamba okuphakathi. Ke ngoko, ingxaki yokutywina kwevalvu iyabonakala kakhulu.

Ukuqinisekisa ukuba ivalvu ingayinqumla kakuhle indlela ephakathi ngaphandle kokuvuza, kuyimfuneko ukuqinisekisa ukuba ivalvu ayiguquki. Zininzi izizathu zokuvuza kwevalvu, kuquka uyilo olungafanelekanga lwesakhiwo, umphezulu woqhagamshelwano olungenaziphene, iindawo zokubopha ezikhululekileyo, ukulingana okukhululekileyo phakathi komzimba wevalvu kunye nebhonethi, njl. Zonke ezi ngxaki zinokubangela ukuvaleka kakubi kwevalvu. Kaloku, ngaloo ndlela kudala ingxaki yokuvuza. Ke ngoko, iteknoloji yokuvaleka kwevalvu yiteknoloji ebalulekileyo enxulumene nokusebenza kwevalvu kunye nomgangatho, kwaye ifuna uphando olucwangcisiweyo nolunzulu.

Izinto ezisetyenziswa kakhulu zokutywina iivalvu ziquka ezi ntlobo zilandelayo:

1. I-NBR

Ukumelana kakuhle neoyile, ukumelana nokuguguleka okuphezulu, ukumelana kakuhle nobushushu, ukunamathela okunamandla. Iingxaki zayo kukumelana nobushushu obuphantsi, ukumelana ne-ozone ephantsi, iimpawu zombane eziphantsi, kunye nokuthamba okuphantsi kancinci.

2. I-EPDM

Eyona nto ibalulekileyo kwi-EPDM kukuxhathisa kwayo i-oxidation, ukuxhathisa i-ozone kunye nokuxhathisa ukugqwala. Ekubeni i-EPDM iyinxalenye yosapho lwe-polyolefin, ineempawu ezintle kakhulu ze-vulcanization.

3. I-PTFE

I-PTFE inokumelana okukhulu kweekhemikhali, ukumelana neeoyile ezininzi kunye nezinyibilikisi (ngaphandle kweeketones kunye nee-esters), ukumelana kakuhle kwemozulu kunye nokuxhathisa i-ozone, kodwa ukumelana nokubanda akunamandla.

4. Isinyithi esenziwe ngentsimbi

Qaphela: Isinyithi esitshisiweyo sisetyenziselwa amanzi, igesi kunye ne-oyile kunye nobushushu obuyi-1.5≤100°C kunye noxinzelelo oluqhelekileyo lwe≤1.6mpa.

5. I-alloy esekwe kwi-nickel

Qaphela: Ii-alloys ezisekelwe kwi-nickel zisetyenziselwa imibhobho enobushushu obuyi--70~150°I-C kunye ne-PN yoxinzelelo lobunjineli≤20.5mpa.

6. Ingxubevange yobhedu

I-alloy ye-copper inokumelana nokuguguleka okuhle kwaye ifanelekile kwiipayipi zamanzi kunye nomphunga ezinobushushu obuphezulu≤200℃kunye noxinzelelo oluqhelekileyo lwe-PN≤1.6mpa.