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Unlocking Liquid Turbine Flow Meter Accuracy in Oil and Gas Applications

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Daniel Liquid Turbine Meter Loading Rack Application

Accurate liquid flow measurement is crucial in various applications, including petroleum processing, custody transfer, and chemical blending. Liquid turbine flow meters with high accuracy are required to ensure precise and reliable measurements. The liquid turbine meter has gained significant popularity due to its exceptional accuracy and reliability. This article will delve deeper into turbine flow meters’ function, linearity, sizes, and more.

In this blog, you will learn:

  • The function of turbine flow meters

  • Defining factors of the meter’s performance

  • The average accuracy of the flow meter

  • Typical sizes for the meters

  • Installation and maintenance considerations

  • The best meters on the market for liquid applications

Understanding the Function of Turbine Meters

A turbine meter is designed to measure the volumetric flow rate of liquids passing through a pipeline. They consist of a turbine rotor positioned within the flow stream, which is rotated by the force of the flowing liquid. As the liquid flows through the turbine meter, the rotational speed is then converted into electrical signals, captured by the electrical pickoffs mounted on the meter body. The electrical frequency output is proportional to the flow rate with each pulse representing a small incremental volume of flow, allowing for accurate measurement.

Turbine Meter Parameters

Several key parameters define the performance of turbine meters:

Linearity: Linearity measures the variation in signal output across the meter’s nominal flow range. The Daniel turbine meters have a nominal K-factor, which represents the number of pulses output for a given measured volume. Advanced technology enables linearization of the meter registration within flow computers, enhancing measurement accuracy.

Repeatability: Repeatability refers to a meter’s ability to consistently indicate the same reading under the same flow conditions. Turbine meters, including the Daniel Liquid Turbine Meter, exhibit excellent repeatability, making them suitable for various applications.

Accuracy: Accuracy represents how closely the meter indicates the actual flow and is typically expressed as a percentage of the true volume for a specific flow range. The Daniel Liquid Turbine Meter ensures high accuracy, surpassing rated flow range accuracy in some cases.

Resolution: Resolution refers to the smallest increment of total flow that can be individually recognized, typically defined by a single pulse. Turbine meters inherently provide high resolution, allowing for precise measurements.

Range: Range denotes the ratio of maximum flow to minimum flow over which the specified linearity is maintained. The Daniel Liquid Turbine Meter offers a normal range or turndown of 10:1, which can be exceeded depending on the meter size and required linearity.

Accuracy of Liquid Turbine Flow Meters

Liquid turbine meters are renowned for their linearity and repeatability. Their linearity can reach ±0.15% and a repeatability of ±0.2% under favorable conditions. Considering these factors and selecting the appropriate meter for specific applications is crucial to ensure optimal performance. Achieving such exceptional precision is crucial in industries where even slight deviations in flow measurement can have significant consequences. Accurate measurement enables better control over processes, improves efficiency, reduces costs, and ensures compliance with regulations.

Turbine Meter Sizes

Liquid Turbine meters come in various sizes to accommodate different flow rate ranges. The size refers to the diameter of the pipe or conduit it can be installed in. Common sizes range from small diameters, such as 1/2″, to larger sizes such as 24″, depending on the application’s specific requirements. This wide range of sizes allows the meter to be used in diverse industries such as oil and gas, chemical processing, water treatment, and more.

Installation and Maintenance Considerations for a Turbine Meter

Daniel Liquid Turbine Meter Series 1500 Repair As Found

Proper installation and regular maintenance are essential for achieving and maintaining accurate measurements with turbine flow meters. Correct placement within the flow stream, ensuring a straight pipe run upstream and downstream, and proper grounding is crucial for accurate readings. Additionally, periodic evaluation and maintenance procedures should be followed to ensure the ongoing accuracy of the flow meter.

Cherokee Technical Solutions Turbine Meter Evaluation and Repair Services

Daniel Liquid Turbine Meter Series 1500 Repair as left

In addition to the various factors to consider when installing and maintaining turbine flow meters, it is crucial to highlight the value of Cherokee Technical Solutions (CTS) Liquid Turbine Meter evaluation and repair services. We offer expert comprehensive in-house evaluation and repair services.

During every turbine meter evaluation and repair, CTS techs follow a detailed checklist ensuring all critical aspects of the meter are inspected. Some of these tasks include replacing the internals of the meter, testing power, and connections, applying the correct voltage, checking for wear, examining pickoff static resistance, verifying rotor assembly integrity, and assessing the condition of the meter’s LME. Finally, providing a detailed service report to the client.

Cherokee Technical Solutions’ commitment to excellence, attention to detail, and expertise in turbine meter evaluation and repair make them a trusted partner for accurate measurement. Our services ensure turbine flow meters maintain optimal performance, improving industrial processes’ efficiency and reliability.

High Accuracy for Custody Transfer Applications

In custody transfer applications, where the accurate measurement of fluids is critical for financial transactions, turbine flow meters excel. Their high accuracy, advanced electronics, and pulse integrity ensure precise measurements required for custody transfer in the petroleum industry. Daniel Measurement and Control’s Series 1500 Liquid Turbine Meters, specifically designed for custody transfer applications, provide exceptional reliability and accuracy, maintaining trust and integrity in financial transactions.

Daniel Liquid Turbine Flow Meters

Daniel Series 1200 LTM


The Daniel Series 1200 and 1500 Liquid Turbine Flow Meter Systems combine turbine meters with electronic instrumentation to measure volumetric total flow and flow rate accurately. Each Daniel turbine meter consists of a cylindrical housing containing a precise turbine rotor assembly. As fluid passes through the meter, it causes the rotor to rotate at an angular velocity proportional to the flow rate. Magnetic pickoffs mounted on the meter body capture the rotor’s velocity, generating pulsing voltage signals. These signals, representing discrete volumes, are transmitted to flow computers and prover computers for further calculations and display.

heir Series 1500 Liquid Turbine Meters are ideal for custody transfer applications in the petroleum industry. They provide reliable and accurate measurements with a stainless steel internal assembly, high flow ranges, and advanced electronics for total pulse integrity. The Series 1200 Liquid Turbine Meters are also designed for load rack and marketing terminal operations. They offer durability, extended flow range, and improved measurement accuracy. You can experience trusted performance and precise measurements in various industry applications by choosing Daniel.

Incorporating Flow Conditioner

Canada Pipeline Accessories Flow Conditioners

Incorporating flow conditioners into the pipeline is equally important in having a reliable meter. The primary reason for using flow conditioners is to eliminate pipeline swirls, which can account for a substantial portion of measurement errors. CPA flow conditioners have been proven to eliminate up to 80-95% of pipeline swirls, restoring flow profile symmetry and eliminating distortions before the measurement point. By isolating the liquid flow meter from upstream disturbances, flow conditioners allow for much shorter meter runs while maintaining high repeatability. This improves the effectiveness of many meter diagnostics by providing flow stability.

Liquid turbine flowmeters are highly accurate and reliable for measuring flow rates in various applications. Their versatility, ability to handle a wide flow range, and high accuracy make them a preferred choice in petroleum processing, custody transfer, and chemical blending. Selecting the appropriate turbine meter and flow conditioners, implementing proper installation and maintenance practices can help maintain precise measurements and optimize process efficiency.

Need Help Finding Turbine Flow Meters For Your Applications?

Are you interested in learning more about Cherokee Measurement & Control’s liquid turbine flow meters offerings? Contact us today at (918) 446-1611 or at sales@cherokeetulsa.com.