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Manual Gearbox Triple Eccentric Metal Hard Seal Flanged Butterfly Valve. Triple Eccentric Design: Ensures zero friction during operation and prevents sealing surface scratches. Customizable Materials: Body, inner components, and gaskets can be tailored to specific working conditions. Lightweight & Compact: Saves materials and offers obvious economic benefits in large-diameter pipelines. 12-Month Warranty: Covers free repair or replacement for faults caused by product quality issues. Lifetime Technical Support: Spare parts provided at cost price with ongoing technical assistance after warranty.