When more than one pressure relief valve is installed, how should they be configured?

When multiple pressure relief valves are installed, they should be configured in parallel with each other. This arrangement allows each valve to operate independently, ensuring that if one valve activates due to overpressure, the others remain available to relieve excess pressure if necessary.

This parallel configuration is essential for reliability and safety, as it provides a backup mechanism; if one valve fails to open or becomes blocked, the rest can still function. Additionally, parallel arrangement helps distribute the flow equally among the valves, which can be crucial for systems that require a specific amount of pressure to be maintained.

In contrast, a series configuration would not provide the same level of redundancy and could potentially lead to a failure in pressure relief if one valve does not function correctly. Similarly, placing the valves in the suction line or directly on the compressor head may not adhere to best practices for pressure management within a system, as these positions could interfere with proper operation and safety standards.