Zeziphi izinto ezisetyenziswa ngokuqhelekileyo zokutywina kwiivalvu?

Kukho iintlobo ezininzi zeevalve, kodwa umsebenzi osisiseko uyafana, oko kukuthi, ukudibanisa okanye ukunqumla ukuhamba okuphakathi. Ngoko ke, ingxaki yokutywinwa kwevalve ivelele kakhulu.

Ukuqinisekisa ukuba ivalve inokunqumla ukuhamba okuphakathi kakuhle ngaphandle kokuvuza, kuyimfuneko ukuqinisekisa ukuba isitywina sevalve sichanekile. Zininzi izizathu zokuvuza kwevalvu, kubandakanywa uyilo olungekho ngqiqweni lolwakhiwo, umphezulu wodibaniso oluneziphene, iindawo ezizibophelelayo, indawo ekhululekileyo phakathi komzimba wevalvu kunye nebhonethi, njl. njl. Zonke ezi ngxaki zinokukhokelela ekutywinweni kakubi kwevalvu. Ewe, ngaloo ndlela kudala ingxaki yokuvuza. Ke ngoko, itekhnoloji yokutywinwa kwevalve yitekhnoloji ebalulekileyo enxulumene nokusebenza kwevalvu kunye nomgangatho, kwaye ifuna uphando olucwangcisiweyo kunye nobunzulu.

Izinto ezisetyenziswa ngokuqhelekileyo zokutywina kwiivalvu ziquka ezi ntlobo zilandelayo:

1. I-NBR

Ukuchasana kwe-oyile okugqwesileyo, ukumelana nokunxiba okuphezulu, ukumelana nobushushu obuhle, ukuncamathela okuqinileyo. Ukungalungi kwayo kukunganyangeki kobushushu obuphantsi, ukunganyangeki kwe-ozone, iipropathi ezilambathayo zombane, kunye nokuqina okuncinci.

2. EPDM

Eyona nto ibalulekileyo ye-EPDM kukuxhathisa kwayo okuphezulu kwe-oxidation, ukumelana ne-ozone kunye nokumelana nokubola. Ekubeni i-EPDM iyeyentsapho ye-pololefin, ineempawu ezibalaseleyo ze-vulcanization.

3. PTFE

I-PTFE inamandla okumelana neekhemikhali, ukuxhathisa ioli eninzi kunye ne-solvents (ngaphandle kwee-ketones kunye ne-esters), ukumelana nemozulu elungileyo kunye nokumelana ne-ozone, kodwa ukunganyangeki okubandayo.

4. Intsimbi yokuphosa

Qaphela: Intsimbi yokuphosa isetyenziselwa amanzi, igesi kunye neoyile yeendaba kunye nobushushu be≤100°C kunye noxinzelelo oluqhelekileyo lwe≤1.6mpa.

5. I-alloy esekelwe kwi-nickel

Qaphela: I-alloys esekelwe kwi-nickel isetyenziselwa imibhobho enobushushu be-70 ~ 150°C kunye noxinzelelo lobunjineli PN≤20.5mpa.

6. Ingxubevange yobhedu

I-alloy ye-Copper inokumelana nokunxiba kakuhle kwaye ifanelekile kwimibhobho yamanzi kunye ne-steam kunye nobushushu≤200℃kunye noxinzelelo lwe-PN≤1.6mpa.