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Electric Hard Seal Butterfly Valve. Triple-Eccentric Sealing: Ensures minimal wear and tighter sealing as the valve closes. Bidirectional Sealing: Supports bidirectional sealing unaffected by flow direction. Corrosion-Resistant Surface: Disc surface welded with cobalt-based hard alloy for durability. Metal and Elastic Sealing: Combines stainless steel ring with metal hard sealing. Versatile Voltage Options: Available in 24V, 110V, 220V, and 380V configurations. Fast Actuation: Quarter turn electric actuator with 25s open/close time. Multiple Material Choices: Body options include ductile iron, cast steel, and stainless steel.