What prevents gate valves used in high-pressure steam systems from binding?

In high-pressure steam systems, gate valves are designed to control the flow of steam effectively and securely. The flexible gates are critical because they allow for thermal expansion and contraction, which is common in high-pressure environments. This flexibility ensures that the gate can move smoothly within the valve body, even under fluctuating temperatures and pressures.

Moreover, if the gate were too rigid, it could become misaligned or bind within the valve due to expansion or other mechanical stresses. By using flexible gates, the risk of binding is significantly reduced, ensuring that the valve operates properly and can be opened or closed as needed without getting stuck. This design feature is essential for maintaining safety and efficiency in high-pressure steam systems.

Other options, while potentially relevant in different contexts, do not address the specific need for preventing binding in high-pressure situations effectively as flexible gates do.