Principle: Based on the ISO 5167-4 standard, the venturi tube offers durable flow measurement with minimal pressure loss.
![01_Venturi_Tube_mashined-Main[1]](https://www.emcocontrols.com/wp-content/uploads/2022/05/01_Venturi_Tube_mashined-Main1.png)
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Design and calculation standards
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ISO 5167-4, ASME MFC-3M
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Sizes
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DN 50 - DN 250, 2” - 10"
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Pressure rating
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PN 10 - 640, 150 - 2500 lbs, ISO PN 20 - 420
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β (d/D)
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preferred range 0,4 < β < 0,75
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Material
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Carbon steel, AISI 316, Duplex, 254 SMO, other on request
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Mounting style
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Weld ends according to DN 2559 or ANSI B16.25. Flanges acc. to DIN or ANSI B16.5 standards (Greyloc Clamp connection available on request)
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Pressure taps
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Weld ends Ø 21.3 mm, 26.9 mm, thread connection 3/8", 1/2" BSP, 1/2" NPT, or flanged
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Tappings
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Single pressure tappings or 2x4 tappings each arranged with an external annular ring to equalize the pressure
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Outlet cone
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7-15°
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Accuracy
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1 % (acc. to ISO 5167)
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Pressure loss
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Depending on outlet cone, between 10-15% of the differential pressure measured
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Limits for Reynolds No
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2*10^5 < ReD < 2*10^6 according to ASME
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Accessories |
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shut-off valves
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Condensing chamber unit for steam flow
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