Ball valve in the pipeline is mainly used to do cut off, distribution and change the direction of the medium flow, it only need to use the rotation of the 90 degrees of operation and a small torque can be closed tight. Ball valve is the most suitable for the use of switch, cut off valve, V type ball valve. Electric valve should pay attention to the pipeline parameters, but should pay special attention to the use of environmental conditions, the electric valve in the electric device is a mechanical and electrical equipment, the use of the state of its use of the environment. Normally, electric ball valve, butterfly valve in the following circumstances to use special attention.
