Installation and Commissioning of Balance Flow Meter

Abstract: The installation and debugging information of the balance flow meter is provided by the excellent flow meter and flow meter manufacturer and quotation manufacturer. The balanced flowmeter has greatly improved the traditional throttling device and has the remarkable feature of balanced rectification. The traditional throttling device has only one flow aperture, which makes the fluid lose its ideal state after throttling; while the balanced flowmeter has multiple function apertures, which can maximize the capacity. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the installation and debugging of the balance flowmeter. The balanced flowmeter has greatly improved the traditional throttling device and has the remarkable feature of balanced rectification. The traditional throttling device has only one flow aperture, and the fluid loses its ideal state after throttling; while the balance flowmeter has multiple function apertures, which can maximally balance and rectify the flow field into an ideal fluid, thereby reducing the differential pressure flowmeter's performance. The advantages are brought into full play. Balanced flowmeter is suitable for almost all fluid measurement, which is a revolution in fluid measurement technology. At present, balanced flowmeter has been widely used in petroleum, chemical, metallurgy, electric power, natural gas, water treatment and other industries. Installation requirements of differential pressure transmitter (1) Introduce the pressure pipe on the positive pressure side of the balance flowmeter into the three-valve group and connect it to the positive pressure chamber of the differential pressure transmitter, and introduce the pressure pipe on the negative pressure side of the balance flowmeter into the three-valve group for connection To the negative pressure chamber of the differential pressure transmitter (2) The installation position of the differential pressure transmitter on the process pipeline is related to the measured medium. In order to obtain a better installation effect, the following conditions should be considered A to prevent the transmitter from being corrosive Or the overheated medium to be measured directly contacts B Prevent dregs from depositing in the impulse pipe and block C The lengths of impulse pipes on both sides of positive and negative pressure should be the same as possible D The head of liquid column in impulse pipes on both sides of positive and negative pressure should be balanced E The pressure pipe is installed in the place where the temperature gradient and temperature fluctuation are the smallest. The transmitter should be installed beside or above the pipeline under test, so that the accumulated liquid can easily flow into the pipeline. middle. Special attention should be paid to prevent the temperature of the differential pressure transmitter from contacting the medium when measuring steam or other high-temperature media to exceed the limit temperature of the transmitter. Installation requirements for temperature and pressure transmitters 1. When measuring superheated steam medium, temperature integrated transmitter and pressure transmitter must be added for dynamic compensation. When measuring saturated steam medium, a pressure transmitter must be added for dynamic compensation. 2. When measuring natural gas and gas medium, a pressure transmitter must be added for dynamic compensation, and a transmitter with safety barrier and explosion-proof device must be used. 3. When measuring hot water medium, when heat display is required, an integrated temperature transmitter must be added, otherwise the integrated temperature transmitter can be omitted. 4. The temperature integrated transmitter is installed on the pipeline under test, and the temperature probe should be inserted into the top of the temperature probe beyond the first 5D pipe section or the rear 2D straight pipe section to ensure the measurement accuracy. 5. The pressure taking point of the differential pressure transmitter must be outside the 5D straight pipe section in front of the balance flowmeter or the 2D straight pipe section after the balance flowmeter, and an on-off valve must be installed in between. For the installation of temperature integrated transmitter and pressure transmitter, in principle, the requirements of this system can be met as long as the conventional installation specifications are met. For specific installation requirements, please refer to their respective installation instructions. The installation of the balance valve and the three-valve group requires the function of the balance valve or the three-valve group (1) to adjust the zero point of the differential pressure transmitter (2) to prevent the positive and negative of the differential pressure transmitter and the overpressure of the pressure chamber, please refer to the method and guide as shown below. pressure line connection. Commissioning and operation After the installation is completed according to the installation principles and procedures, before the system commissioning, check whether all equipment, pipes, valves, joints, wires, terminals, signal plugs, etc. are complete, correct and reliable, and whether the pipes and equipment are blocked or leaked. If there are any problems such as wrong connection, short circuit, disconnection and poor contact between wires and signal connection points, system debugging can be carried out after checking and confirming that there are no errors. Open the pressure-taking valves on both sides of the flowmeter (note: all valves must be opened); (2) Close the positive and negative pressure valves on both sides of the three-valve group, and open the balance valve in the middle; The negative pressure pie has no valve to open for sewage discharge. Clean the impulse tube. 2. Condensation of the pressure pipe: (1) When there is enough condensed water in the pressure pipe, the positive and negative pressure valves on both sides of the three-valve group can be opened (the balance valve in the middle is still open at this time), so that the The condensed water enters the positive and negative pressure chambers of the differential pressure transmitter respectively. Since the deposition of condensed water takes a certain amount of time, the displayed value of the differential pressure transmitter will not be accurate at the beginning. When the condensed water is completely filled with the entire measuring system (including the pressure-taking body, the pressure-inducing pipe and the positive pressure of the differential pressure transmitter) negative pressure chamber),The indicator of the differential pressure transmitter tends to be normal (about 2 hours). (2) Close the drain valve and let the medium condense naturally in the pressure-inducing pipe until the entire pipe is filled with condensed water (about 4 hours). 3. Exhaust of the differential pressure transmitter: In order to ensure that the residual air in the positive and negative pressure chambers of the differential pressure transmitter is cleaned up, the exhaust gas on the positive and negative pressure chambers of the transmitter is removed.

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