LeRoi/Dresser Rand compressor second stage prv pops off at 70lbs
LeRoi/Dresser Rand compressor
I have a LeRoi/Dresser Rand compressor with a 20hp 3 phase motor with a 200 gallon tank, model 770A. I have replaced the o-rings and felts on the valves and resealed the caps. I removed the air lines and found the secondary leaking so I resealed all of them. While running it will pump up to 70 lbs and then the PRV will pop on the high pressure secondary stage cylinder. Can you explain to me why this might be happening and what is needed to do? I also see that the PRV is mounted on the intercooler off the high pressure head if that matters.