The valve that is least susceptible to wire drawing and seat erosion is the _________ valve.

The valve that is least susceptible to wire drawing and seat erosion is the globe valve. This is primarily due to its design and flow characteristics. Globe valves have a spherical body shape that allows for a linear flow path, minimizing turbulence and wear on the seating surfaces. The closure mechanism of the globe valve consists of a disk that moves perpendicular to the flow, which helps maintain a tight seal and reduces the likelihood of erosion caused by high-velocity fluid passing across the seat.

Wire drawing and seat erosion typically occur in scenarios where the flow rate is high, leading to rapid wear on the valve seats over time. Because the globe valve is designed to provide a smooth closing action and control the flow adequately, it is less prone to these issues compared to other valve types that may experience more significant wear due to their design and operating conditions.

In contrast, valves like gate valves and plug valves can have higher susceptibility to wire drawing because of the way they operate and how they direct flow through the valve. A wedge gate valve, while often reliable, also does not have the same level of protection against high wear as a globe valve does, particularly during throttling operations.