What should be done if the differential pressure relief valve does not open as required?

When the differential pressure relief valve does not open as required, inspecting the valve for defects is crucial. A malfunctioning valve may have internal issues such as debris causing it to stick, wear from prolonged use, or seal problems that prevent proper operation. Thoroughly examining the valve allows for identifying any physical faults that may need repair or replacement, ensuring the valve can function correctly.

Checking for blockages is important but more of a secondary action; if the valve itself is defective, addressing blockages alone will not resolve the primary issue. Adjusting the pressure setting might be necessary under different circumstances, but if there is a defect in the valve, adjusting it won’t rectify the root problem. Replacing the entire assembly is a more drastic step that may not be necessary if the valve can be repaired after inspection, which helps in maintaining system efficiency and controlling costs. Hence, focusing on the inspection first allows for targeted troubleshooting.