What is required for manual safety valve testing?

For manual safety valve testing, it is essential to reach at least 75% of the safety valve popping pressure. This threshold is significant because it ensures the valve functions properly under conditions close to its intended operating pressure. Testing at this level helps to ensure that the valve will open as designed to relieve excess pressure and maintain safety within the system.

If the testing pressure is set too low, it may not accurately reflect the valve’s performance under actual operating conditions, leading to potential safety hazards. Therefore, achieving 75% of the popping pressure allows for a reliable assessment of the valve’s responsiveness and ensures that the safety mechanisms are operational and effective. This approach is in accordance with safety standards and best practices for maintaining safe boiler operation.