Surge events in liquid pipelines can cause severe infrastructure damage, loss of product and environmental harm, as well as a significant threat to personnel safety.
This solution integrates the Danflo surge relief valve into a skidded surge relief system that provides protection against dangerous pressure spikes in piping systems and pipeline surges. Danflo Surge Relief Valves are rated ANSI 150-900 and comprise a balanced plug assembly that slides back and forth to open, close and throttle. Danflo valve technology is used in the M&J Valve rate-of-rise surge relief system. This design combines a surge pressure relief valve with a predictive pressure rate-of-rise system to allow preventive action against a developing surge event.
To predict the rate of rise of the system pressure, the M&J Valve surge relief solution utilises a differential pressure pilot valve. This additional pressure control is constantly monitored and, upon reaching a pre-set limit, will trigger the main surge relief valve to open. As the surge dissipates, the valve closes without slamming shut, preventing ‘chatter’ or creation of additional surges. It is then ready to act again on any subsequent surge, so the line is constantly protected from pressure surges. The system, therefore, is said to offer a proactive response to pressure change and can reduce downtime associated with surge events.
According to Celeros, the circuit is mechanical and provides a hydraulic safety barrier against transient pressure surges. Because it uses no electronic devices, the M&J Valve surge relief system stand-alone solution is not affected by power loss, communication disruption, or cyber-attacks: making it less vulnerable to external factors. The system not only reacts to high pressure surge waves to minimise risks of the process exceeding the maximum allowable operating pressure, but it continuously monitors the rate of pressure rise in the system. This enables it to trigger a timely response that delivers a stable operation by early prevention of a surge event. The M&J Valve surge relief system, therefore, supports condition monitoring and preventative maintenance regimes.
In addition, its high flow capacities mean that smaller and/or fewer valves are used, which saves on installation costs and weight. A set-pressure test port makes it easy to comply with regulatory testing requirements and regulations, and an additional reserve flow capacity means the system can even cope with unexpectedly large surge transients.