Differential Pressure Flow Meters

    Complete DP flow measurement solutions with custom-engineered primary elements

    ±0.5%
    Venturi Accuracy
    1/2" to 120"
    Line Size Range
    600°C
    Max Temperature

    FlowWorx DP Solutions

    Complete Differential Pressure Flow Measurement Systems

    Custom-engineered differential pressure flow measurement solutions for liquids, gases, and steam with primary elements designed to ASME/ISO standards

    Orifice Plate Systems

    Cost-effective flow measurement with proven reliability for general process applications

    Accuracy: ±1-2% of flow rate

    Key Features

    • Universal application for liquids, gases, and steam
    • Easy replacement and maintenance
    • Wide size range (1/2" to 120")
    • Established ISO 5167 standards

    Specifications

    Line Size:
    1/2" to 120" (DN15 to DN3000)
    Beta Ratio:
    0.2 to 0.75
    Pressure Drop:
    40-80% of differential
    Temperature:
    Up to 600°C
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    Venturi Tube Systems

    High accuracy flow measurement with minimal pressure loss for energy-critical applications

    Accuracy: ±0.5% of flow rate

    Key Features

    • Low permanent pressure loss (10-15%)
    • Superior accuracy and repeatability
    • Self-cleaning design for dirty fluids
    • Ideal for custody transfer applications

    Specifications

    Line Size:
    2" to 120" (DN50 to DN3000)
    Beta Ratio:
    0.3 to 0.75
    Pressure Recovery:
    85-90%
    Rangeability:
    4:1 typical
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    Flow Nozzles

    Robust design for high-velocity and erosive flow applications

    Accuracy: ±1% of flow rate

    Key Features

    • Higher flow capacity than orifice plates
    • Better pressure recovery than orifice
    • Suitable for high-temperature steam
    • Erosion-resistant design

    Specifications

    Line Size:
    2" to 48" (DN50 to DN1200)
    Beta Ratio:
    0.2 to 0.8
    Pressure Drop:
    30-60% of differential
    Applications:
    Steam, high-velocity flows
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    Averaging Pitot Tubes

    Multi-port averaging design for large pipes with minimal pressure drop

    Accuracy: ±1-2% of flow rate

    Key Features

    • Minimal permanent pressure loss (<5%)
    • Hot-tap installation capability
    • Ideal for large diameter pipes
    • Cost-effective for retrofit applications

    Specifications

    Line Size:
    2" to 120" (DN50 to DN3000)
    Insertion Depth:
    Full diameter averaging
    Pressure Loss:
    <5% of differential
    Installation:
    Flanged or hot-tap
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    Endress+Hauser Deltabar Systems

    Electronic Differential Pressure Technology

    Revolutionary electronic DP measurement eliminating traditional impulse lines and their associated maintenance issues

    Deltabar FMD78

    Electronic differential pressure system with dual pressure sensors

    Accuracy: ±0.075% of span

    Key Features

    • No impulse lines required
    • Eliminates plugging and freezing issues
    • Individual sensor diagnostics
    • 70% installation cost reduction

    Specifications

    Measurement Range:
    100 mbar to 40 bar
    Static Pressure:
    Up to 700 bar
    Temperature Range:
    -70 to +400°C
    Communication:
    HART, PROFIBUS PA, FF
    View Product Details

    DP Primary Element Selection Guide

    TypeBest ForPressure LossAccuracyRelative Cost
    Orifice PlateGeneral purpose, low initial cost, easy replacementHigh (40-80%)±1-2%$
    Venturi TubeEnergy recovery, custody transfer, slurriesLow (10-15%)±0.5%$$
    Flow NozzleHigh-velocity steam, erosive flowsMedium (30-60%)±1%$
    Averaging PitotLarge pipes, retrofits, minimal pressure dropVery Low (<5%)±1-2%$

    Applications

    Steam Flow Measurement

    Accurate steam flow measurement for energy management and billing

    Large Diameter Pipes

    Cost-effective solution for water mains and large process lines

    Custody Transfer

    High-accuracy measurement for fiscal metering applications

    High-Temperature Service

    Reliable measurement up to 600°C for demanding processes

    Why Choose Differential Pressure Flow Measurement?

    • Proven, reliable technology with decades of field experience
    • Wide application range for liquids, gases, and steam
    • No moving parts ensures long-term reliability
    • Cost-effective for large pipe sizes
    • Suitable for extreme temperatures and pressures
    • Well-established ISO/ASME design standards

    Need a Custom DP Flow Solution?

    Our flow measurement specialists can size and design the perfect differential pressure system for your application