1. The Preparation before the Installation: the pipeline before and after ball valve must be ready. The pipe around ball valve should be coaxial and the two flange sealing surfaces should be parallel. The pipe should be able to withstand the weight of ball valve. Otherwise, the pipe must be equipped with appropriate support. Purge the pipelines around the ball valve and clear out the oil, welding slag and all other impurities pipe. Check the ball valve marks if it is perfect and confirm ball valve can work normally by fully opening and closing the ball valve several times. Remove the valve protection on both ends of flange pieces. Check and clear the ball valve hole if there is any dirt. The sealing surface of ball valve seat may be damaged even if there are only small particles of foreign matter between the seat and the ball.

2. The installation of ball valve: Install the ball valve on the pipeline and either valve end can be mounted on the upstream side. Handle driving ball valve can be installed in any place of the pipe. However, gear or pneumatic operating ball valve should be installed upright in horizontal pipe and the drive device should be at the top of pipeline. The sealing gasket should be installed between the flanges of ball valve and pipe flange according to the pipeline design. The bolts of flange should be tightened symmetrically, successively and evenly. Connect the pneumatic lines when using pneumatic drive device.