Air valve 1.Body:GGG50 with internal and external epoxy resin coating2.Disc:GGG50/SS304/SS3163.Stem:2Cr13/SS304/SS3164.Sealing :EPDMAir valve Body:GGG50 with internal and external epoxy resin coatingDisc:GGG50/SS304/SS316Stem:2Cr13/SS304/SS316Sealing :EPDM
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