speedaire model 3Z493 that is blowing air out of safety valve

by john bennett
(deming,nm )

I have a speedaire model 3Z493 that is blowing air out one of the safety valve

what would cause the air to come out the safety valve on one of the compressor heads? I tried switching the valves and the problem is still on the same cylinder,any suggestions?
John, the PRV is letting go because it is experiencing too high pressure in the line / head.

If you switched the valves, and the same problem occurs in the same cylinder, and the cylinder in question is the second of the two-stage, then I would remove, clean and replace the tank check valve, assuming that the problem is in the second cylinder. Make sure you power down and dump all the air before disassembling the tank check valve.


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