Which of the following statements is true about direct acting relief valves?

Direct acting relief valves are designed to provide rapid response to changes in pressure, making them particularly effective in low flow applications. Their mechanism allows them to open quickly when the system pressure exceeds a preset limit, which is essential in situations where immediate pressure relief is necessary to protect equipment or maintain safe operating conditions.

This characteristic of having a quick action makes them less suitable for higher flow applications, where a different type of valve, such as a pilot-operated relief valve, may be more effective due to its ability to handle larger volumes of fluid without sacrificing stability in pressure control.

While direct acting relief valves are quite effective at maintaining their pressure settings under stable conditions, their performance can be less robust when faced with significant fluctuations in flow, which is often the case in high flow applications. Additionally, while some valves may require regular maintenance, direct acting relief valves may have different maintenance needs compared to other types of valves, depending on their application and usage conditions.