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Which type of valve has the least wire drawing and seat erosion?
Ball valve
Globe valve
Check valve
Gate valve
The correct answer is: Globe valve
The ball valve is known for having the least wire drawing and seat erosion compared to other types of valves. This occurs due to its design, which features a smooth, spherical ball that rotates within a seat to open and close the flow of fluid. The minimal contact between the ball and the seat during operation greatly reduces wear and tear, resulting in less erosion over time. In contrast, globe valves, while effective in throttling and flow control, have a structure that can cause more friction and contact with the seat, leading to a higher rate of wire drawing and degradation. Check valves primarily function to prevent backflow and may experience wear based on their application and positioning, but they do not typically face the same conditions as a ball valve. Gate valves are primarily used for on/off applications and can experience erosion at the seat area due to fluid turbulence when partially opened.