Differential pressure

[scooter]

Trying to wrap my head around differential pressure, if I have 16" vertical rise on my incline mano, and am testing at 28" will I have 44" in the lower chamber or 60"

[Tony]

There will be minus 28 inches under what you are testing (in the settling chamber).
Then an additional 16 inches of further pressure drop below the orifice plate.

So the vacuum motors will see a 44 inch depression.

[scooter]

When building the inclined manometer if I intend to use 16" differential pressure, does the same concept of the u bend manometer apply, where 16" of water column is 8" of accual vertical rise on the incline?

[Tony]

Sixteen inches of pressure will support a water column difference of sixteen inches.

With a manometer that has a large surface area well at the low end, as most sloping manometers do, the water will rise sixteen inches above the (constant) water level in the well.

If there is no well, and the manometer is the U tube variety, one leg will go up eight inches, and the other leg will go down eight inches.