The Burkert flowmeter is a differential pressure-based device designed to measure fluid flow. It works by using various types of differential pressure gauges or transmitters to monitor the flow of different fluids within pipelines. The Burkert flowmeter's throttling components include elements such as an annular chamber orifice plate and a nozzle. These throttling devices, when combined with a differential pressure transmitter, enable the measurement of liquid, steam, and gas flows. Burkert flowmeters find applications across industries including petroleum, chemicals, metallurgy, power generation, and light manufacturing.
Burkert flowmeters are tools specifically designed to measure flow-related differential pressure. They offer precise measurements and user-friendly operations. Should you have any questions, feel free to consult our online experts for assistance.
The orifice flowmeter operates by analyzing the pressure difference created as fluid passes through a throttling device in the pipe. This results in localized flow constriction, which increases velocity while decreasing static pressure, creating a measurable pressure drop—or differential pressure—before and after the throttling point. The greater the medium's flow rate, the larger the pressure difference generated. Thus, the orifice flowmeter determines flow rates by measuring this pressure difference. This method is rooted in principles of energy conservation and flow continuity.
The orifice flowmeter represents a modern generation of instruments that combine flow, temperature, and pressure detection functionalities, with automatic compensation for temperature and pressure variations. It employs advanced microcomputer technology and low-power solutions, offering robust features, compact design, ease of use, and longevity.
The Burkert flowmeter’s throttling device boasts a straightforward yet durable structure, ensuring reliability over time. Key advantages include international standardization for orifice calculations, a broad application range covering single-phase and some mixed-phase flows, and the capability for standard orifice devices to function without real-world calibration. Integrated orifice flowmeters simplify installation by eliminating the need for additional pressure piping, allowing direct connection to differential pressure and pressure transmitters.
Installation plays a crucial role in maintaining the accuracy of Burkert flowmeters. Uneven flow velocity distribution and secondary flow within the tube can significantly impact measurement precision. To achieve optimal accuracy, especially in industrial settings, the flowmeter typically requires upstream and downstream straight pipe lengths of 20D and 5D respectively. A rectifier at the upstream end can help eliminate secondary flow issues. Ensuring a straight pipe section of approximately 20D upstream, along with a rectifier, can enhance measurement accuracy to meet calibration standards.
Burkert flowmeters demand clean fluid conditions. Pre-installing filters ahead of the flowmeter ensures fluid purity, with the filter’s cleanliness monitored via differential pressure changes. To maintain single-phase flow—avoiding air or steam contamination—it’s advisable to install a degasser upstream. For easily vaporizable liquids, adequate back pressure downstream is essential, typically double the pressure drop at maximum flow plus 1.2 times the vapor pressure of the liquid at its highest temperature.
Signal transmission lines require careful configuration to minimize electrical interference and maximize the display instrument’s sensitivity to pulse signals. Shielded cables should be used, with grounding at the display instrument end. Transmission lines must avoid proximity to strong electromagnetic fields and power lines. Additionally, the maximum signal line length depends on the output voltage of the sensing coil at minimum flow rates, with coefficients determining appropriate line lengths based on voltage ranges.
In summary, the Burkert orifice flowmeter combines flow, temperature, and pressure detection in a single tool. Proper installation, fluid cleanliness, and signal integrity are vital to achieving accurate and reliable measurements.
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