Bidirectional Zero Leakage Metal Sealed Hydraulic Triple Eccentric Flanged Hard Seal Butterfly Valve for Water Supply Turbine Inlet Shutoff

Bidirectional Zero Leakage Metal Sealed Hydraulic Triple Eccentric Flanged Hard Seal Butterfly Valve for Water Supply Turbine Inlet Shutoff. Triple Eccentric Zero Friction Design: Three offsets eliminate disc to seat contact friction during entire stroke, preventing wear and significantly extending service life. Bidirectional Zero Leakage Sealing: All metal or laminated metal graphite seal rings achieve bidirectional full differential pressure sealing with zero measurable leakage per AP1 598. High Torque Hydraulic Actuation: Integrated hydraulic cylinder delivers high, smooth torque with fast response, ideal for large diameters and high pressure differentials. Adjustable Opening/Closing Speed: Hydraulic system enables stepless speed regulation for both opening and closing, effectively eliminating water hammer risks. Adjustable Sealing Pressure: Sealing specific pressure can be adjusted via external driving torque, immune to ageing or cold flow issues of conventional soft seats. Laminated Metal Graphite Seal: Disc seal ring composed of stacked stainless steel and flexible graphite layers combines hard and elastic sealing advantages for extreme temperatures. High Rigidity Monobloc Cast Body: Streamlined passages with reinforced ribs withstand high differential pressure and water hammer; blowout proof stem ensures safety. Online Maintainable Seat: Seal ring secured by clamping plate allows replacement without removing valve from pipeline, significantly reducing downtime. Fire Safe & Anti Static Design: All metal sealing without soft materials meets AP1 607 fire safe requirements, suitable for petrochemical and hazardous applications. Low Flow Resistance & Energy Saving: Streamlined disc design with triple eccentricity achieves flow resistance coefficient as low as 0.10, serving both shutoff and regulating functions.