What are advantages and disadvantages of gate valves
What is the gate valve?
Gate valve refers to a valve in which the closing member (gate) moves in the vertical direction of the channel axis, and is mainly used as to cut off medium in the pipeline for purpose of fully open or fully closed application. In general, gate valves are not available for regulated flow. It can be applied to low temperature pressure or high temperature and high pressure, and can be made according to different materials of the valve. However, gate valves are generally not used in pipelines for transporting media such as mud.
1 fluid resistance is small;
2 The required torque for opening and closing is small;
3 It can be used on the ring flow of the medium flowing in both directions, that is to say, the flow direction of the medium is not limited;
4 When fully open, the sealing surface is less affected by the working medium than the shut-off valve. The shape of the body is relatively simple and the manufacturing process is easy to finish;
6 Face to face length is relatively short.
1 The external dimensions and opening height are large, and the required installation space is also large;
2 During the opening and closing process, the sealing surface encounters the large friction. In case of the high temperature application, it is likely to cause scratches;
3 General gate valves have two sealing faces, which add some difficulties to processing, grinding and maintenance;
4 The opening and closing time is long.