หลายๆ คนมักพบว่าตนเองสับสนเกี่ยวกับความแตกต่างระหว่างโกลปวาล์วและเกทวาล์ว. เพื่อที่จะให้ความกระจ่างในเรื่องนี้, Farpro Valve will help you understand the differences between these two types of valves by comparing them across various aspects.
Difference in Sealing Surface Structure:
The valve plate of a globe valve, also known as the valve flap, is parallel to the fluid passage. ในทางตรงกันข้าม, the valve plate of a gate valve, commonly referred to as the gate, is perpendicular to the fluid direction.
Difference in Working Principle:
When operating a globe valve, turning the handwheel causes the stem to rise or fall, resulting in the movement of the handwheel as well. ในทางกลับกัน, the gate valve operates differently, where turning the handwheel causes the stem to move up or down while the position of the handwheel remains unchanged.
นอกจากนี้, gate valves only have two states: fully open or fully closed. They primarily function as shut-off valves and have a longer stroke during the opening and closing process. โกลบวาล์ว, however, have a smaller stroke range, allowing the valve plate to be positioned at various points along its movement to regulate flow.
Difference in Installation:
Globe valves are designed as one-way valves, and the valve body is marked with a flow direction arrow. ระหว่างการติดตั้ง, it is crucial to follow the indicated direction of fluid flow as per the arrow. ในทางตรงกันข้าม, gate valves can accommodate fluid flow in both directions, making them more versatile in terms of installation.
Difference in Fluid Resistance:
Gate valves exhibit low fluid flow resistance, with the flow resistance coefficient typically ranging from 0.08 ถึง 0.12. They require minimal force to open or close, and the medium can flow in either direction. ในทางกลับกัน, globe valves tend to have higher fluid resistance, with resistance coefficients usually around 3.5 ถึง 4.5.
By understanding the differences between stop valves (วาล์วโลก) และวาล์วประตู, you can make informed decisions when selecting the appropriate valve for your specific applications. Whether it’s optimizing flow regulation or ensuring efficient shut-off, ฟาร์โปรวาล์ว offers a wide range of high-quality valves to meet your needs.