China High Quality 6 Inch Butterfly Valve Factories – Double offset, Tripple offset,eccentric,conccentric Butterfly Valve,DN2000,DN1800,DN1600,DN1400,DN1200,DN1000 – UNIQUE

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Correcting holes are made on flange according to standard, easy correcting during the installation. Through-out bolt or one-side bolt used. Easy replacing and maintenance. Shaft and disc connected by pin, torque screw or non pin, to achieve the opening and closing.