What do valve ratings indicate regarding their use?

Valve ratings provide crucial information about the working pressure for various fluids, which is essential for ensuring safe and effective operation in a system. These ratings specify the maximum pressure that can be sustained by the valve during operation, indicating how much pressure the valve can handle without risking failure or leakage. This is particularly important in applications where the fluid's pressure can vary significantly, as using a valve rated for insufficient pressure can lead to catastrophic failures.

Though other aspects like lifespan, material composition, and temperature range are important considerations for valves, they are not what valve ratings primarily indicate. Understanding the working pressure allows millwrights and engineers to select the appropriate valve that meets the operational demands of the specific application they are working on.