6, apamemea u'amea valve: talafeagai mo PN≤ 2.5mpa vai, vai sami, okesene, ea, suauu ma isi ala o faasalalauga, faapea foi ma le vevela o le -40 ~ 250 ℃ vaʻa vaʻaia, masani ona faʻaaogaina mo ZGnSn10Zn2 (apa apamemea), H62 , HPB59-1 (apa), QAZ19-2, QA19-4 (apamemea alumini).

7, kopa vevela maualuga: talafeagai mo le mamafa PN≤ 17.0mpa, vevela ≤570℃ ausa ma oloa suauu.Fa'ailoga masani o le ZGCr5Mo, 1 cr5m0.ZG20CrMoV, ZG15Gr1Mo1V, 12 crmov WC6, WC9, ma isi Filifiliga faʻapitoa e tusa ai ma le faʻaogaina o le valve ma faʻamatalaga o le vevela.

8, valve uʻamea maualalo vevela: talafeagai mo le mamafa o le PN≤ 6.4mpa, vevela ≥-196℃ ethylene, propylene, kasa masani vai, faʻafefe vai ma isi ala faʻasalalau, faʻaoga masani) ZG1Cr18Ni9, 0Cr18Ni9, 1Cr18Ni9Ti, ZG0Cr18Ni9

9, valve uʻamea faʻafefete faʻamaʻi: E talafeagai mo le mamafa o le PN≤ 6.4mpa, vevela ≤200 ℃ nitric acid, acetic acid ma isi ala o faasalalauga, faʻaaogaina masani o le ZG0Cr18Ni9Ti, ZG0Cr18Ni10<nitric acid>, ZG0Cr18Ni12Cr2Ti, ZG0Cr18Ni12Mo2Ti, ZG112Mo2Ti, ZG12Mo2Ti, ZG12Mo2Ti, ZG0Cr18Ni9Ti, ZG0Cr18Ni10

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