We have two, two stage air compressors that are connected in parallel to a storage tank to control the pneumatics of the building. The compressor closest to the tank had to be rebuilt with pistons and rings. After rebuilding the relief valve on that compressor pops every time we turn it on. The other pump works fine. The lines were inspeced and are clear of blockage. We have also found that there seems to be a lot of liquid in the line. At first we repiped the discharge line so that moisture from the first pump doesn't collect in the discharge of the rebuilt pump. This has not solve the problem.. Any suggestions??
Hi, Just a guess, but if the relief valve pops immediately after the compressor starts, and you have noticed an excessive amount of water internally, I’m wondering if the cooling water jacket around the heads is not leaking into the pistons of the compressor. Just a thought. Phred