Eight-path meter from Emerson adds accuracy for flow measurement
Emerson has introduced the Daniel 3418 Eight-Path Gas Ultrasonic Flow Meter, which delivers highly accurate flow measurement in natural gas custody transfer applications with reduced upstream piping requirements and without flow conditioning. The Daniel 3418 compensates for flow distortions that result from pipe bends, shorter straight runs or smaller design footprints, allowing it to operate in more design configurations without sacrificing accuracy and long-term performance.
The 3418 is the first ultrasonic flow meter to pass all perturbation tests for OIML R-137 Accuracy Class 0.5 with only five pipe diameters in front of the meter and without a flow conditioner. It features eight interlocked direct chordal paths, positioned as two British Gas path layouts where the second is the mirror image of the first, allowing the meter to cancel out asymmetrical velocity effects. This design enables the meter to measure flow with greater resolution and accurately calculate swirl, reducing the need for flow conditioning and long upstream piping configurations.
As a part of the Daniel Gas Ultrasonic product line, the 3418 features the ability to calculate standard flow and directly integrate with temperature and pressure transmitters, gas chromatographs and flow computers while providing real-time meter and process diagnostics. The 3418 uses Emerson's proprietary MeterLink diagnostic software with specific enhancements designed to mimic the look and feel of the original Daniel four-path gas ultrasonic meter interface.
"The addition of this new model further supports our customers with the most technologically advanced fiscal measurement ultrasonic portfolio in the marketplace, yielding the highest level of measurement confidence available," said Lonna Dickenson, director of product marketing for Daniel ultrasonic flow meter products at Emerson.
Available in sizes DN250 to DN1050 (10-in to 42-in), the 3418 offers bidirectional flow capabilities, increased flow capacity and no incremental pressure drop, therefore reducing measurement risk and minimizing operating cost.