Ball valve in the pipeline is mainly used for cutting, distribution and change the direction of flow of media, it only needs to rotate 90 degrees of operation and a small rotation torque can close tight. The most suitable valve to do the switch, cut off the valve to use, V-type ball valve. In addition to attention should be paid to the electric valve valve parameters, should pay special attention to the use of environmental conditions, the electric valve in the electric device is an electromechanical equipment, its use by its use of environmental impact. Under normal circumstances, electric ball valve, butterfly valve in the following environment to use special attention.