Protectoseal 6240 series end-of-line vacuum relief valves are designed to prevent explosions or collapses in tanks caused by internal and external pressure increases, specifically where only vacuum relief is necessary.

• Certified flow characteristics
• Certified test report confirming leakage performance
• "Air cushion" design for low leakage performance at 90% of the set pressure (less than 1 SCFH)
• Special design to reduce issues such as condensation, drainage, and freezing
• Rotary bolt design to facilitate easy control and maintenance
Datasheet