Measuring Flow Rates with
Fox P Venturi Flowmeters

Fox P Venturi Flowmeters are the simplest and most reliable means of measuring flow rates. In an instrumentation market filled with vastly more complex options, venturi flowmeters-an 18th Century solution - are still being selected for measuring flows in 21st Century process systems.

Venturies use the basic Bernouilli equation which relates fluid velocity to pressure. Increase fluid velocity and the pressure decreases. By increasing the velocity by forcing the fluid through a throat of known diameter, and by measuring the resultant P, we can calculate flow rate quite accurately.

Fox Venturi Flowmeters are not made from castings. All our venturies are machined from bar. This means that you can specify any throat diameter or flow-vs.-P design point and receive a precision machined venturi with a very reasonable delivery. You can specify any end connection, material, or special features required.

Why use Fox P Venturi Flowmeters?

Venturi flowmeters have a number of key features which make them attractive for designing into a system:

• 1/4"-6" Line Sizes
• Low Unrecoverable Pressure Loss - Venturies are usually chosen when losses must be minimized. Unrecoverable loss is about 15% of measured inlet-to-throat P.
• Suitable for High Pressure/High temperatures/Low temperatures: - Fox Venturies can be rated to any pressure, from 1000 psig to 20 ksi.
• Fast delivery available for custom engineered, custom built P venturies for 1/4" - 6" line sizes

  These features make them ideal for a variety of applications:
  

• Corrosive/Caustic Applications
  • Can be easily manufactured in any material:
    Monel, Titanium, Teflon, Hastelloy, Naval Bronze
• Temperature extremes
  
  • Cryogenics or High Temperatures