Emergency Relief Venting
Solved Leak Problem
Background
A large chemical processing plant in the United States, operating with hazardous and highly toxic materials, struggled with persistent leaks from an Emergency Relief Vent installed on one of its storage tanks. The chemical handled was extremely volatile, making any fugitive emissions especially problematic. The facility’s LDAR readings were repeatedly spiking, leading to safety concerns, elevated
maintenance
Maintenance
Combination of all technical and administrative actions, including supervision actions, intended to maintain or restore a unit in working order.
workloads, and pressure to meet increasingly stringent emissions regulations.
The plant sought a solution that could deliver a verifiable, long-term improvement in sealing integrity.

Solution
The facility approached PROTEGO® for technical support. After analyzing the tank service conditions and the vapor characteristics of the chemical, PROTEGO® recommended installing two 12" PROTEGO® D/SVL pressure relief valves with metallic sealing in place of the existing 24" emergency relief vent.
The D/SVL series provides a particularly high flow capacity. Its extreme tightness is far above the normal standard and meets the stringent demands of emission control regulations.
The facility decided to adopt PROTEGO® D/SVL valves as its standard across operations.
Results
The PROTEGO® solution delivered:
- Near-zero leakage performance, supporting stable LDAR compliance
- Elimination of recurring vent failures, reducing operational risk
- Greater maintenance efficiency, cutting troubleshooting time and emergency interventions
- Improved environmental performance, with a measurable reduction in fugitive emissions
- Long-term reliability, validated by the plant’s repeat purchases
One thing I have learned is whenever faced with a difficult tank venting problem – call PROTEGO®. They know what they are doing. Their products work, and work often way better than they say. Our plant wouldn’t try to install another vent without going to these guys.



