VF7000 Series butterﬂy valve - Installation Instructions VF7000系列蝶阀 - 安装说明
1.Valves and piping must be kept clean and free of dirt and foreign matter inside.
2.Install the valve according to the ﬂow direction marked on the valve. (Fig.1)
3.Please install the valve stem horizontally to prevent sand and some chips collected around bottom bushing and seat, and damage the valve. (Fig.2)
4.Install valve and gaskets into pipeline. (Fig.3)
Make sure the valve to be installed between ﬂanges and concentrically with ﬂanges,
1.Keep valve protection boards until installation.
2.Make sure the material and size of gaskets could be suitable for the service, check the faces of ﬂange and valve are smooth and ﬂat. Sandpaper the faces if there was any harm.
3.Check all the bolts and nuts, lubricant is recommended to all the bolts and nuts before ﬁx them.
4.Slightly screw the bolts onto the valve, check to make sure that the valve moves smoothly when opening, tighten the screws according to the sequence in ﬁg.5. Test cycling the valve again to be sure that there is no interference.