The correct way to install a ball valve is as follows:

1. Prepare the pipelines before and after the ball valve.

2. Blow clean the pipelines before and after the ball valve to remove oil stains, welding slag and all impurities in the pipelines.

3. Check the mark of the ball valve to ensure that the ball valve is intact. Open and close the valve several times to verify that it is working properly.

4. Remove the protective parts on the connecting flanges at both ends of the ball valve.

5. Check the valve hole to remove possible dirt, and then clean the valve hole.

6. Install the valve on the pipeline. Either end of the valve can be installed on the upstream end. The handle-operated valve can be installed anywhere on the pipeline. However, ball valves with gearboxes or pneumatic actuators should be installed upright, that is, installed on horizontal pipes, with the driving device above the pipe.

7. Install a sealing gasket between the valve flange and the pipeline flange according to the pipeline design requirements.

8. The bolts on the flange must be tightened symmetrically, successively and evenly.

9. Connect the pneumatic pipeline (when using a pneumatic driver).

10. Operate the driver to open and close the ball valve several times. It should be flexible and without sluggishness to confirm that it is working normally.