The measurement accuracy and service life of duweyintelli hygienic liquid turbine flowmeters highly depend on installation specifications and daily usage details. Many minor issues during equipment operation are not easily detected immediately, and if ignored for a long time, they will directly lead to various potential hazards such as measurement deviations and equipment failures. duweyintelli Flowmeter Manufacturer To ensure the stable and accurate operation of flowmeters, the key details that are extremely easy to overlook during the installation and usage process are now summarized as follows.
Installation Requirements for duweyintelli Flowmeter Piping
For hygienic turbine flowmeters , the inner diameters of the upstream and downstream pipes at the installation point must be consistent with the inner diameter of the flowmeter body to avoid problems such as fluid turbulence and throttling caused by pipe inner diameter deviation, which may affect the accuracy of flow measurement.
Requirements for straight pipe sections and installation levelness
The duweyintelli flowmeter must be horizontally installed on the pipeline, and the pipeline’s inclination angle must be controlled within 5°. During installation, it is necessary to ensure that the flowmeter’s axis is concentric with the pipeline’s axis, the fluid flow direction is completely consistent with the flow direction marked on the flowmeter, and issues such as eccentricity and reverse flow are eliminated.
To ensure the stability of fluid flow regime, a straight pipe section with a length of not less than 2D and a constant diameter shall be reserved upstream of the flowmeter; if the installation site conditions permit, it is recommended to reserve a 20D straight pipe section upstream and a 5D straight pipe section downstream to minimize the impact of flow regime disorder on measurement accuracy. (D is the nominal diameter of the flowmeter)
Valve and Bypass Pipeline Installation Requirements
To achieve non-stop maintenance of the hygienic turbine flowmeter and ensure the continuity of medium transportation, it is necessary to install shut-off valves on the pipelines before and after the flowmeter, and also set up a bypass pipeline. Flow control valves are uniformly installed downstream of the flowmeter.
During normal operation of the equipment, the upstream shut-off valve must remain fully open to prevent fluid instability and pressure fluctuations caused by throttling in the upstream pipeline, which may in turn interfere with measurement data.
External environment and media filtration requirements
Sanitary turbine flowmeter manufacturers recommend: prioritize indoor installation to avoid interference from complex outdoor environments. If outdoor installation is necessary, it is required to be equipped with complete sun protection, rain protection, and lightning protection measures to slow down equipment aging and extend the service life of the equipment.
If the transported medium contains impurities or particulate matter, a filter must be installed upstream of the straight pipe section of the flowmeter to effectively intercept impurities, prevent the turbine impeller from wearing and lagging, and ensure the long-term stable operation of the equipment. It is recommended to select a filter with a 5-micron sieve opening, which can efficiently block tiny impurities such as droplets and sand grains.
Selection and Daily Operation Specifications
duweyintelliSanitary Turbine Flow MeterSelection must strictly match the actual operating conditions’ flow range, and over-flow and over-speed operation are strictly prohibited to ensure that the measurement accuracy meets the standard and, at the same time, extend the service life of the equipment.
During the operation of the flowmeter, it is prohibited to privately disassemble the front and rear end covers of the device or modify internal parameters. Violation of this rule will directly damage the operating parameters of the device, leading to abnormal measurement and equipment failure. When installing the sealing gasket, ensure that the gasket is flat without protrusions, prevent the gasket from protruding into the pipeline, and avoid interfering with fluid flow and affecting measurement accuracy. During device calibration operations, pressure data must be collected through the dedicated pressure tapping port to ensure calibration accuracy.
Before installing the device, it is necessary to thoroughly clean up debris such as welding slag, gravel, dust, and fragments inside the pipeline to prevent impurities from entering the device and damaging the turbine structure.
When the device is put into operation, it is necessary to follow the principle of slow opening and closing of “open the front valve first, then open the rear valve”, and it is strictly prohibited to fully open the valve instantaneously to avoid damage to the turbine impeller caused by the instantaneous impact force of the fluid.
Equipment lubrication must be strictly operated in accordance with the Device ID specification. The frequency of oiling is adjusted based on the cleanliness of the medium, and under normal operating conditions, it is sufficient to add lubricating oil 2-3 times per year.
During the pipeline pressure test, purging, and venting operations, it is easy to cause the turbine to overspeed and idle or run in reverse, which can easily lead to damage to the flowmeter. Therefore, protective control measures need to be taken in advance during the operation.
Influence of Medium Viscosity on Flowmeter Measurement
Medium viscosity is the core factor affecting the measurement performance of the duweyintelli turbine flowmeter, directly changing key parameters such as the device’s K value, linearity, and starting displacement. The specific influencing patterns are as follows:
1. For the working conditions of low-production wells with high viscosity of produced fluid, a dedicated turbine flowmeter with higher signal acquisition sensitivity should be selected, which can accurately capture ultra-low rotational speed signals below 0.01 r/s, ensuring the measurement accuracy of low-flow, high-viscosity media.
2. Before the linear response range of the turbine flowmeter, the device’s K value will exhibit an exponential upward trend with the Reynolds number at the pipe inlet.
3. As the viscosity of the medium continuously increases, the K value of the flowmeter gradually decreases, while the measurement linearity of the device continuously deteriorates, and the measurement error will increase accordingly.
4. The greater the viscosity of the medium, the lower the starting displacement and minimum response speed of the turbine flowmeter, and the response threshold of the device to low-flow conditions will further decrease.
5. For measurement scenarios of different viscous fluids, only one set of calibration operations under high-viscosity conditions with different incoming flow Reynolds numbers needs to be completed to fit the corresponding relationship between the device K value and the Reynolds number, and further back-calculate the device response curves suitable for various viscous fluids, thus simplifying the calibration process for multiple operating conditions.
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