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avk雙法蘭蝶閥介紹：

avk雙法蘭蝶閥，中線型活動內襯，pn 10/16

epdm橡膠內襯，aisi420閥桿，aisi304碟板，no sealing box mounted

型號: 813/83-001 - 中線蝶閥，符合en 593，短系列13，球墨鑄鐵，雙法蘭，不銹鋼碟板 .

concentric butterfly valve, double flanged, loose liner. face to face dimensions: en 558-2, series 13 (din 3202 f16). design to en 593, drilling to en 1092. body: ggg-40 
top flange: iso 5211 
disc:aisi 304 
bush:bronze 
coating: electrostatically applied epoxy 
resin - internally【敏感詞】externally 
avk butterfly valves, series 813 are of the concentric type with the shaft placed in both centerlines,【敏感詞】the valve closing a few degrees before 0. equal areas of the disc are thus working with【敏感詞】against the flow,【敏感詞】the flow will not influence the opening【敏感詞】closing torque.