1. Check butterfly valve specification, pressure, temperature and corrosion resistance before installation. All parts should be checked for damage or loosening.
2. Butterfly valve can be installed on any angle of the pipe, should be closed installation; welding pipe flange should be the valve seal plate to prevent particles, debris contusion sealing surface, after welding remove the valve, valve sealing surface and pipe cavity cleaning, and then install fixed valve.
3.Before installation, clean the sealing surface (both ends sealing surface, butterfly plate sealing surface, seat sealing surface) thoroughly, remove dust and dirt.
4.Before installation, the butterfly valve should be empty, the opening and closing should be flexible, the opening and closing position should be in accordance with the pointer indication position.
5.The butterfly plate must be in the closed position during installation to ensure that the butterfly plate does not collide with the pipe flange.
6.The opening position should be determined according to the rotation angle of butterfly valve butterfly plate.
7.Butterfly valve with bypass valve, open bypass valve before opening.
8.Install butterfly valves according to medium flow arrow.
