What common issue arises when using the vapor recovery system in MC-306/DOT-406 cargo tanks?

The use of a vapor recovery system in MC-306/DOT-406 cargo tanks is designed to capture vapors released during the loading and unloading of hazardous materials, but it can lead to specific issues, one of which is related to the venting of gases.

When dealing with these systems, rubber vent covers can sometimes lose their seal or become dislodged due to the pressure changes that occur during the vapor recovery process. This can result in the vent covers popping off, which allows product spillage to occur. Spillage not only poses environmental hazards but also increases the safety risks for personnel and the surrounding area. Properly functioning vent covers are crucial for maintaining seal integrity and preventing the escape of materials.

Understanding this problem highlights the importance of regular maintenance and checks on vapor recovery systems to ensure that all components, including vent covers, are in good condition and that the system functions correctly without allowing for any potential leaks or spills.