Gate valve: refers to the valve that the closing part (gate) moves along the vertical direction of the channel axis. It is mainly used for cutting medium on the pipeline. That is, fully open or fully closed. In general, gate valves cannot be used for regulating flow rate. It can be used for low temperature low pressure or high temperature high pressure, and can be used according to the different material of the valve. However, gate valves are generally not used for conveying mud and other media in the pipeline.

Advantage

1. Small flow resistance;

2. Opening and closing torque is small;

3. Can be used in the medium to flow in two directions of the ring network pipeline, that is to say, the flow direction of the medium is not limited;

4. When fully open, the sealing surface is less eroded by the working medium than the globe valve;

5. The body structure is relatively simple, the manufacturing process is better;

6. The structural length is relatively short.

Disadvantage

1. The overall size and opening height is larger, the space for installation is also larger;

2. During opening and closing, the friction and abrasion of the sealing surface is larger. What’s more, in the high temperature is easy to cause the phenomenon of abrasions;

3. Generally the gate valves have two sealing surface, which increase the difficulties for the processing, grinding and maintenance;

4. It takes longer time to open and close.