Views: 0 Author: Site Editor Publish Time: 2023-12-28 Origin: Site
Good sealing performance: The sealing surface is wedge-shaped with respect to the vertical centerline. When closing, the gate can be "wedged" into the valve body, forming a tight seal. It can withstand relatively high pressures and is suitable for applications with strict sealing requirements, such as in the pipeline systems of the petrochemical and power industries.
Compact structure: It has a simple shape and a short structural length. It has good manufacturability. Compared with some valves with complex structures, it occupies less space and is relatively convenient to install, especially suitable for installation environments with limited space.
Wide application range: There is a complete variety of valve body materials. Packing and gaskets can be reasonably selected according to actual working conditions or user requirements. It can be applied to various pressure, temperature, and medium conditions, and can be used in the pipeline for transporting various fluids such as water, steam, oil products, and corrosive media.
Low fluid resistance: After the gate is opened, the fluid passage is basically unobstructed, the fluid resistance is small, and the flow direction of the medium is not restricted. It does not disrupt the flow or reduce the pressure, which is beneficial to improving the transportation efficiency of the pipeline system.
Long service life: The sealing between the gate and the valve seat is often formed by surfacing with hard alloy, which has good wear resistance, high temperature resistance, corrosion resistance, and anti-scratch performance. It can effectively reduce the wear of the sealing surface and extend the service life of the valve.
Relatively high operating torque: Due to the wedge-shaped structure between the gate and the valve body, during the opening and closing process, the gate needs to overcome relatively large friction and medium pressure. Therefore, relatively high operating torque is usually required, which may affect the simplicity of operation and requires a more powerful drive system, such as a larger handwheel or an electric actuator.
Higher requirement for medium cleanliness: The clearance between the gate and the valve body is relatively small. During operation, if the medium contains impurities, particles, or sediments, it is easy to cause the gate to get stuck or blocked, affecting the normal opening and closing and sealing performance of the valve, and may even damage the sealing surface. Therefore, it has a relatively higher requirement for the cleanliness of the medium.
Greater difficulty in processing and maintenance: Especially for single-gate wedge-gate valves, the precision requirement for the angle of the sealing surface is relatively high, and the processing and grinding are difficult. Once the sealing surface is worn or damaged, it is relatively difficult to repair, requiring professional techniques and equipment.
Limited adaptability to temperature changes: In high-temperature or low-temperature environments, due to the thermal expansion and contraction characteristics of materials, the wedge-shaped gate may get wedged or the seal may become loose. Although double-gate wedge-gate valves have some improvements in this regard, compared with some other types of gate valves, their adaptability to temperature changes is still relatively weak.
Not suitable for fine flow regulation: Wedge gate valves are mainly used for fully opening and fully closing situations and are difficult to achieve precise flow regulation. In applications that require fine control and throttling of the flow, their performance is not as good as that of valves with good regulating performance, such as ball valves and globe valves.
