Which is better, plug valve or gate valve?

Plug valve advantages
1, the plug valve is used for frequent operation, quick and lightweight opening and closing.
2, plug valve fluid resistance is small.
3, plug valve structure is simple, relatively small size, light weight, easy maintenance.
4, good sealing performance
5, not limited by the installation direction, the flow of the medium can be arbitrary.
6, no vibration, small noise.

Disadvantages of gate valve:
1. There is always friction in the opening and closing process of the gate, so the operating torque is large, and it is easy to produce scratches on the sealing surface of the gate and the seat, resulting in valve leakage;

2, no self-test leakage device,(even if the two gate valves and then install a small valve to achieve this function, can not achieve automatic detection function);

3, for the medium containing particle impurities, such as sand, deposited at the bottom of the valve, so that the gate can not be completely closed in place, resulting in valve leakage is very serious, (this is a fatal shortcoming for the gate valve).