Apollo Series 511 safety relief valve, model 511-FEBK-MAA-0075.

• 1" MNPT inlet x 1-1/2" FNPT outlet
• Bronze body, brass trim, closed cap
• Set pressure 75 PSI, capacity 550 SCFM air
• ASME Section VIII UV stamped and National Board certified, CRN 0G8547.5C
• New in factory box with tag

Please see all photos for details.