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2025
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07
Advantages and disadvantages of gate valves
Advantages
1. Low flow resistance. The medium passage inside the valve body is straight through, and the medium flows in a straight line, resulting in low flow resistance.
2. Less effort required for opening and closing. Compared to globe valves, the direction of the gate plate movement is perpendicular to the direction of the medium flow, whether opening or closing.
3. Large height, long opening and closing time. The gate plate has a large opening and closing stroke, and the lifting is done through a screw.
4. Water hammer phenomenon is not easy to occur. The reason is the long closing time.
5. The medium can flow in any direction on both sides, easy to install. Both sides of the gate valve passage are symmetrical.
6. Relatively short structural length (the distance between the two connecting end faces of the shell).
7. Simple shape, short structural length, good manufacturability, wide range of applications.
8. Compact structure, good valve rigidity, smooth passage, small flow resistance, sealing surface using stainless steel and hard alloy, long service life, using PTFE packing, reliable sealing, easy and flexible operation.
Disadvantages
(1) General gate valves have two sealing surfaces, and the manufacturing process is more complex than that of globe valves.
(2) There is relative friction between the sealing surfaces, resulting in greater wear and tear, and it is inconvenient to repair the sealing surfaces after wear.
(3) The structural dimensions of the valve cavity are large, resulting in a long structural length, large external dimensions, large installation space, and large-diameter gate valves are particularly bulky.
(4) Long valve opening and closing time.
(5) A closed valve cavity can be formed, so a pressure relief structure should be set up to prevent abnormal pressure increase in the cavity when needed.
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Integrating product research and development, manufacturing, and sales, specializing in the production of various marine valves
Qingdao Qingfa Chuanbo Shebei Zhizao
Add: Qingdao City, Jimo District, Qingdao City, Jimo District S503
Manager Cao:+86-15020079366
Email:sales@qdqingfa.com
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