AVK双法兰蝶阀介绍：

AVK双法兰蝶阀，中线型活动内衬，PN 10/16

EPDM橡胶内衬，AISI420阀杆，AISI304碟板，no sealing box mounted

型号: 813/83-001 - 中线蝶阀，符合EN 593，短系列13，球墨铸铁，双法兰，不锈钢碟板 .

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 and externally
AVK Butterfly valves, series 813 are of the concentric type with the shaft placed in both centerlines, and the valve closing a few degrees before 0. Equal areas of the disc are thus working with and against the flow, and the flow will not influence the opening and closing torque.