Flange Type Double Eccentric Butterfly Valve

Confirm that the materials of construction listed on the valve tag plate are appropriate for the service intended are as specified.

Check matching of flange drilling pattern of valve and pipe flange before assembly.

Important

Mating flange faces should be in good condition and free of dirt and/or inclusions. Both pipe insides to be well cleaned.

• Place the valve with flange face vertical and shaft horizontal. Assemble counterweight and remove disc locking provisions cautiously. Keep the disc in closed position.
• Check whether the distance between flanges meets the face to face valve dimension. Spread the flanges with adequate tooling for easy installation of the valve.
• Insert the valve with the gaskets between the flanges. Center the valve body and insert all flange bolts.
• Maintain the valve flange alignment while gradually removing the flange spreaders and tighten the flange bolts hand tight.
• Cross tighten all bolting to the proper torque.

• Before installation, the tightness of packing should be checked to ensure that sealing is secured without affecting the turning of stem.
• The valve shall be in full open position when conducting system or pipe line pressure test after the valve installation.
• The butterfly valve can installed horizontal and vertical pipeline the install position should ensure maintain and easy to replaced.
• Manually operated valve should be operated by using the handle. Use of lowers or other tools is not allowed