Got into a disagreement with my housing inspector (selling my house). He
was taking readings of my water pressure at various locations. Suggested
that I adjust my regulator for a little more pressure. Good idea, but I
told him that as long as her is going to read 'static' pressure only, he is
going to get the same reading no matter how far he is from the source (as
long as it's the same elevation). At least that's the way it was 40 years
ago (hydraulics classes) unless things have changed. Which leads me to the
following question:



Is the regulation of pressurized air much different? In a simple water
regulator the deed is accomplished by merely restricting the flow. In other
words, the regulator on the downhill side of my compressor could be set to
80 psi while my storage tank is reading 130 psi. I realize that I am going
to get 80 psi under flow conditions. But, do I really have 130-psi static
until I actually request the air flow (pull the trigger on my sandblaster,
for instance) at which time the dynamic pressure (pressure under requested
flow) reduces to 80 psi.



If the above is INCORRECT, then, somebody please explain how the reducer
works. How is it able to reduce the static pressure? If the above is
CORRECT, then somebody please explain how my nail gun works. If I shoot
nails at a slow rate (let's say, one every 5 seconds), my gun is basically
working on whatever static pressure is sitting behind the piston therein.
That static pressure should be the full pressure and not the reduced
pressure. Maybe there is a slight component of flow when you shoot a single
nail, but I have found otherwise. e.g., I can plug in my nail gun to a
short hose (say 10 feet), then fire a single successful shot after having
shut off the air supply on the uphill end of the short hose. Since there is
little or no flow, the gun must fire because off static pressure.



If anybody can explain the above, I would greatly appreciate it.



Ivan Vegvary