Quote:
Originally Posted by volvobrynk
Hello
A few questian from Denmark. Sorry for any incorrect spelling!
I have made a good deal on a set of industial vacuum meters, gauge type. Is it posible to use or will the reading be to slopy?
How importen are the 28 inches of water, can less be uset. For instens 20" ot 10"?
Best Regards
Rasmus Brynk
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28” is an industry standard that is used to compare one head flow or one head porter’s claimed flow to another.
If you flow at a different setting like 10”, 20”or 25” you can convert any test pressure to 28” by dividing 28 by the test pressure you are flowing at then squared.
This is the equation the Superflow book gives for converting test pressures although their chart shows a little different #’s.
Forgive me if that is not the correct way to lay out mathematical equations but I’m not a math magician.
Example 28/25 x square root = 1.059, Superflow’s chart shows 1.060?
Example 28/20 x square root = 1.183, Superflow’s chart shows 1.180?
Example 28/10 x square root = 1.673, Superflow’s chart shows 1.670?
Example 28/7 x square root = 2.000, Superflows chart shows 2.000?