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Technical information
Nomogram to determine the nominal hose width (DN)

Chapter 7-4/1
October 1996

Annotation:
Drawing a line between both values Q (l/min) and V (m/sec), you can read the nominal width on the scale in the middle.

Example:
Flow rate Q = 70 l/min
Flow velocity V = 4 m/sec
identified DN = 20 mm (clearence diameter 19.1 mm)

You can also use the following formula:

Q and V are to be inserted using the values above.

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Tel.: +49 (36602) 140-0
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