Venturi Tube

Proven, Reliable, and Low-Maintenance Flow Measurement

The Daniel® Venturi Tube is a proven and reliable solution for fluid measurement applications. Its rugged, streamlined design eliminates sharp edges or angles, making it ideal for measuring solid-laden fluids and slurries. The gradual sloping profile minimizes build-up, ensuring accurate measurements with minimal maintenance. 

One of the key features of the Venturi tube is its low pressure drop, which significantly reduces pumping and operating costs—ideal for low-pressure systems requiring small differentials. Commonly used in gas, liquid, and steam measurement, Daniel® Venturi Tubes are found across various industries, including oil and gas processing, petrochemicals, power generation, and water treatment. 

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Standard Accuracy 0.5% standard, higher accuracies available with calibration
Flow Ranges (turndown) 10:1 or greater
Repeatability ± 0.1% or better
Permanent Pressure Loss Varies with DP and Beta (H/D) Ratio
Beta Ratio 0.4, 0.5, 0.6, 0.7; Additional betas available by request. 
Line Sizes 2” to 24” – 26”and larger – available in any flange specification.
Pressure Ratings ANSI 150 thru 2500
Construction Materials All Grades of Stainless Steel, Carbon Steel and Alloys or any other weldable material.
End Configuration Wafer, Flanged, Beveled, Threaded and Others 
Approvals CE-PED 2014/68/EU, CRN
  • Provides measurement accuracy of ±0.5% and repeatability of ±0.1%. 
  • Available in a wide range of pipe sizes from 2” to 24”, with larger sizes available upon request. 
  • Choose from flanged, threaded, beveled, or wafer options to suit your system’s needs. 
  • Available in stainless steel, duplex steel, carbon steel, and custom alloys to meet specific operational demands. 
  • Manufactured to ISO 5167-4 standards, ensuring consistent quality and performance.  
  •  Lower pressure drop than other primary elements, reducing energy costs. 
  • With no moving parts, the Venturi Tube requires minimal upkeep and is resistant to wear. 
  • Capable of measuring gas, liquid, and steam across a wide range of industries. 
  •  Designed to withstand extreme pressures and temperatures, making it ideal for demanding environments. 
Line Size DN50 to DN200 (2-in to 8-in)
Fluid Type Liquid
Operating Temperature Range -29º C to +66º C (-20º F to +150º F)
Operating Pressure Range ANSI 150 to 300
Materials: Valve Body Carbon Steel, ASTM A352 GR LCC
Materials: Valve Cylinder DN50 to DN 200 (2-in to 4-in): Stainless Steel, ANSI 150 to 600; DN250 to DN 300 (6-in to 8-in) Carbon Steel, Nickel Coated, ANSI 150 to 600
Materials: Valve Piston Standard: Stainless Steel
Materials: Seat Ring DN50 to DN200 (2-in to 6-in) Stainless Steel; DN300 (8-in) Carbon Steel, Nickel Coated
Materials: O-Rings Standard: Viton; Optional: Neoprene, EPR, Kalrez / Teflon AP (Aggressive Products)