1. The valve pipe joint shall not exceed the displacement limit during installation;
2. The installation bolts should be symmetrical and tightened gradually to prevent local leakage;
3. When installing the valve pipe joint on the ground, in the air and vertically, the actual working axial displacement pressure of the valve pipe joint shall be less than the supporting force of the pipeline, otherwise, anti pull off device shall be installed to prevent pulling off under working pressure;
4. The valve pipe joint shall be far away from the heat source and ozone area, and the strong radiation light is strictly prohibited. Exposure and use of media that do not meet the product requirements;
5. During transportation, loading, unloading and installation of valve pipe joints, it is strictly prohibited to scratch the surface sealing surface with sharp tools;
6. When installing products above DN200MM, please use special flange for butterfly valve or small diameter flange to avoid flange pulling off, water leakage and water seepage after installation.