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Venturi Tube Type RH

EMCO Venturi Tube Type for High Pressure Gas Flow RH

venturi tube rh

Manufactured by  emco controls

The EMCO venturi tubes are used as primary elements in flow measurement of high pressure gas and steam according to the differential pressure principle. In high pressure gas flow, the discharge coefficient increase for venturi tubes according to ISO 5167-4, whereas the venturi type RH having a total inlet convergent angle of 10,5° provides a discharge coefficient more in accordance to a physical model.

Design Standards :

  • ISO/TR 15377, ISO 5167-4, ASME MFC-3M
  • Sizes : DN 50 – 200, 2" – 8" according to ISO/TR 15377.
  • Beta (d/D) : 0,4 ≤ β ≤ 0,75
  • Pressure rating : PN 40-640, 300-2500 lbs, ISO PN 50-420.
  • Material : Carbon steel, AISI 316, Duplex, 254 SMO others on request.
  • Mounting style : Weld ends according to EN 9692-1 or ANSI B16.25. Flanges acc. to DIN or ANSI B16.5 standards or Grayloc Clamp connections.
  • Pressure taps : Weld ends Ø 21.3 mm, 26.9 mm, thread connection 1/2" BSP, 1/2" NPT, or flanged, others on request.
  • Tapping hole size : 4 mm
  • Tappings : Single pressure tappings or 2x4 tappings each arranged with an external annular ring to equalise the pressure.
  • Inlet cone : 10,5°
  • Outlet cone : 7 – 15°

Technical Data

  • Accuracy : 1 % (according to ISO/TR 15377) uncalibrated, 1⁄4 % calibrated
  • Pressure loss : Depending on outlet cone between 10 - 15 % of the differential pressure measured
  • Limits for Re. No. : 3 x 10 5 < ReD, 24000 < Re* (Re* = (throat tapping inner d/venturi throat d) x Red.)
  • Accessories : Shut-off valves and condensing chambers for steam flow.

venturi tube rh ga

Straight Run Requirement

DIN Flanges

Diameter β ratio Single 90° bend  Two or more 90° bends 
      in the same plane  
      or different planes  
1 2   3  
A A B A B
0,30 3 a 3 0
0,40 3 a 3 0
0,50 3 a 3 0
0,60 6 3 6 3
0,70 17 3 22 3
0,75 24 6 27 6

Column A: without additional uncertainty

Column B: with 0,5 % additional uncertainty.

Works with:-

Differential pressure transmitters:-IDP10; IDP15; IDP25; IDP31; IDP50
And all our Absolute Pressure and Gauge Pressure transmitters, Temperature sensors and mass flow computers.
MultiVariable Transmitters :- IMV25, IMV30

 
Download Manual (Not Available)

If you require further information on this product or would like a quotation, please contact dp-flow on:

email: sales@dp-flow.co.uk
sales +44(0)1608 544222

Supplied by DP-Flow