Protectoseal Series 18540 Pipe-Away Pressure / Vacuum Conservation Vent is designed to provide pressure and vacuum relief in applications that require hazardous vapors to be piped away, rather than released into the atmosphere. The pallets in the vent housing allow intake of air and escape of vapors as the tank normally breathes in and out. Pallets open and close to permit only that intake or outlet relief necessary to remain within permissible working pressures and avoid tank damage. Relieving vapors may be piped away through a flanged connection one size larger than inlet providing greater flow capabilities.

• Certified flow curves validating flow characteristics of unit
• Certified test report verifying specified settings and leakage performance
• “Air-cushion” pallet design for low leakage performance of no more than 1 SCFH at 90% of the set pressure
• Pallet assembly guides and center pallet stem guide to ensure proper alignment of pallet assembly on the seat and smooth lifting and reseating action
• Automatic condensate drainage design to mitigate freezing, binding and clogging
• Swing-bolt design facilitating inspection and easy maintenance
• Serialized unit and associated weights for easy identification and traceability

Datasheet