IMO all compressors for aeration should have a pressure relief valve. Without one you are "spitting in the eye of the devil" and risking compressor damage whenever one has air blockage. The relief valve is cheap and it protects the most expensive part, the compressor, if ever there is an air blockage.
The vanes seem to break on an 0523 when the pressure gets to 30psi or more for several seconds.
Last edited by Bill Cody; 02/05/14 08:18 PM.
