"In theory" and as I understand your system, ANY airspace, capped or not

in

your stand pipe on the pressure side of the valve will distort the
performance.

The standpipe should be on the suction side of the valve, with no air at

all

in the pressure side.

Bob Darrah

Why?


Not that there is much airspace. My guess is its less than one cubic inch.

Paul Lamar

In order to bring a cubic inch of captive air to, say for example, to 15
psig, you have to compress it by 1/2 cubic inch.  In your system, in order
to do that, you have to get 1/2 cubic inch of water from someplace.  In your
test rig, the only place you can get it is from the intake side, and that
would starve the intake side unless you put a stand pipe on that side to
supply the necessary water.  You will not get any useful pressure readings
with your setup.

I done told Orville and I done told Wilber it would never get off the
ground.

Bob Darrah

I totally disagree this is a closed loop system. THE STAND PIPE IS SEALED.
The stand pipe does NOT add water. What ever water is in the system is in the
system. Now the one cubic inch of air is probably mixed up with the one
gallon of water that is in this test system.


Paul Lamar
 
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