Disadvantages of gate valves

1. Generally, gate valves have two sealing surfaces, and the processing and manufacturing are more complicated than globe valves.
2. There is relative friction between the sealing surfaces, resulting in greater wear and tear. It is inconvenient to repair after the sealing surfaces are worn.
3. The structural size of the central cavity of the valve is large, resulting in a long structural length, large external dimensions, and large installation space. Large-diameter gate valves are especially bulky.
4. Valve opening and closing time is long
5. It can form a closed valve cavity, so if necessary, a pressure relief structure should be installed to prevent abnormal pressure increase in the middle cavity.