Concentric butterfly valve can be installed on the horizontal, vertical and any angle pipe.Also it can be used in both directions. And worker must clean the inner cavity and sealing cover of the valve and pipes before installation.
Concentric butterfly valve must be in the closed position during installation to ensure that the disc does not colide with the pipe flange, make sure the flange welding is correct.
It is not allowed to weld any flange again for avoiding any burning on the rubber parts or anti-corrosion coating after installed.
Wafer concentric butterfly valve must be quipped with assembling flange .Put the butterfly valve into the middle of the special flange at both ends of the pipeline, and use the double head bolt through the pipeline flange and clamp butterfly valve to lock tightly, then it can be used normally.
