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Venturi nozzles
These nozzles have the lowest losses in pressure of all primary
elements. In comparison to orifice plates they also have lower range
of measured flow. There are different shapes and technological
designs of the nozzles.
flow
direction
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Diagram of
DN 200 Venturi nozzle |
Use: for measurement of air sucked from open area
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Long
radius nozzles
These nozzles have lower losses in pressure than orifice plates.
In comparison with orifice plates these also have lower range of
measured flow. The nozzles have different shapes and positions
of pressure tappings.
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DN 50-200 Long-radius nozzles
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Long-radius nozzles
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Use: Measurement within foreign standards
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Elliptic nozzles
These are very specialised products with high requirements on accuracy
of measurement both concerning calculations and the product itself.
Tappings of pressure differential are placed in the throat of nozzle.
Use: As testing meter in acceptance capacity tests of steam
turbines
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