Select the installation site of electric ball valve. The electric ball valve is also called double flange power transmission, because it can reduce the number of people to maintain and facilitate training after installation. Most construction units choose electric ball valve, but design and calculation are required when installing joints. How to select the installation site of electric ball valve? The distribution of the electric ball valve is different from other joint products in that the product needs to be installed in pairs, such as Ω pipeline. After the electric ball valve is installed in pairs, the compensation amount can be increased to 1500 mm, which is a product with large compensation amount in the current pipeline fitting products. When running in the pipeline, the role of the fixed support can be reduced to a minimum, In addition, the blind plate force and thrust will not be generated by itself, and then instability and water hammer will not exist. Compared with other joints, the compensation capacity of the electric ball valve is obvious. There is no need to arrange too many electric ball valve points, and the safety is optimized. Generally, the construction of urban underground pipe network has a high risk factor. According to the installation site practice, the electric ball valve is no longer needed for 500m after installation in a long-distance pipeline. In this way, the number of electric ball valves used is small, the maintenance is few, the natural probability of pipeline leakage is very small, the fluid resistance on the whole pipeline is small, the pressure loss is small, and the operating cost is naturally reduced. According to statistics, the whole project can save more than 20%.