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:: VENTURI TUBES ::

Venturi tubes, pattern approved meter

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Venturi tubeProduction programme of MATTECH company covers production of classical Venturi tubes as well. This metering device is produced in the range of nominal inside diameter from DN 50 to DN 1200. Venturi tubes are designed and produced with regard to requirements of customers (two-sided measurement, special coating, heating with jacketing).

As a production method, machining practice (for lower DN), for higher DN welding of sheet steel is used. Venturi tube with jacketing In-welded Venturi tubes have cylindrical throat with required tolerance given by the standard. Working position of flow meter can be both vertical and horizontal. Venturi tubes can be produced for invoicing purposes as a verified metering device (with verification). For their production usually steel of 11 grade (for air), 12 and 15 (for steam) and 17 (for water and petrochemistry) are used.

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Diagram Venturi tube

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Venturi tube DN 600
vent_trubice_1200_01_s
Venturi tube DN 1200
Venturiho trubice
Venturi tube

Main Advantages of Classical Venturi Tubes:

  •  in comparison with orifice plates and nozzles Venturi tubes require considerably shorter straight lengths. Disturbing elements affect the straight sections of piping and cause rotation of fluid, e.g. two elbows on various levels.
  •  as a source of very low loss in pressure (4-20% of the measured pressure differential) classical Venturi tube is economical measuring element. It has the least pressure difference of all primary elements.
  •  for high speed fluid flows such as steam Venturi tubes are elements which cause the least wear of measuring areas.
  •  Venturi tubes are not clogged by sediments
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Loading of 4 pieces of DN 1200
Venturi tubes
vent_trubice_prechody_s Transition to square piping to
Venturi tube
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Packing of Venturi tube for
transport to abroad

Classical Venturi Tube consists of:

  •  feed cylinder in length 1-3 D for pressure differential taping (+)
  •  conical type confuser with total angle of 21°
  •  cylindrical throat for tapings pressure differential tapings (-). The throat length corresponds to diameter d.
  •  conical diffuser with total angle between 7-15°
  •  annular chamber for taping of pressure differential
  •  feed cylinder and diffuser is finished by a flange or welded joint finish (according to customer's requirement)
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Venturi tube
DN 600
vent_trubice_80_s
Venturi tube
DN 80
vent_trubice_nerez_s
VT DN 1000 stainless steel
material SS 316