1. Advantages:
(1) The fluid resistance is small.
(2) The external force required for opening and closing is small.
(3) The flow direction of the medium is not restricted.
(4) When fully open, the sealing surface is less eroded by the working medium than the stop valve.
(5) The body shape is relatively simple, and the casting process is better.
2. Disadvantages:
(1) The overall dimensions and opening height are both large. The installation requires a lot of space.
(2) During the opening and closing process, there is relative friction between the sealing surfaces, which is easy to cause abrasion.
(3) Gate valves generally have two sealing surfaces, which add some difficulties to processing, grinding and maintenance.
