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Bidirectional Quick Close Adjustable Position Feedback Explosion Proof DN150 Pn25 Hydraulic Triple Eccentric Metal Sealed Flanged Butterfly Valve, Find Details and Price about Bidirectional Sealing Butterfly Valve Zero Friction Butterfly Valve from Bidirectional Quick Close Adjustable Position Feedback Explosion Proof DN150 Pn25 Hydraulic Triple Eccentric Metal Sealed Flanged Butterfly Valve - Sunfair Fluid Control Co., Ltd