On Mon, 6 Oct 2008 16:25:51 -0700 (PDT), wrote:


Many (if not most) compressors do not start under full load. There is
an "unloader" in either the pump output or in the controller.



Methinks that an 'unloading check valve' is a standard commercial
item, useful for smaller compressors. This valve is placed between
the compressor and air receiver. After compressor shut-off this valve
bleeds off the pressure between it and the compressor, allowing the
compressor to start against atmospheric, instead of tank, pressure.

Wolfgang


My Emglo 5hp gasoline powered air compressor has such a valve


Whenever a Liberal utters the term "Common Sense approach"....grab your
wallet, your ass, and your guns because the sombitch is about to do
something damned nasty to all three of them.