Precautions for installation of orifice flow meter and installation of pressure taking port

Abstract: The installation precautions of orifice flow meter and the installation information of pressure taking port are provided by excellent flowmeter and flowmeter manufacturers. Orifice flowmeters are widely used in petroleum, chemical, metallurgy, electric power, light industry and other departments. Orifice flowmeter (also known as throttling device, differential pressure flowmeter) is a differential pressure generating device for measuring flow. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following are the installation precautions for orifice flowmeters and the details of the installation of the pressure port. Orifice flowmeters are widely used in petroleum, chemical, metallurgy, electric power, light industry and other departments. Orifice flowmeter (also known as throttling device, differential pressure flowmeter) is a differential pressure generating device for measuring flow. It can measure the flow of various fluids in the pipeline with various differential pressure gauges or differential pressure transmitters. When the orifice flowmeter measurement system is installed and used, it must meet the following technical requirements: 1) When the orifice flowmeter is installed, its hole center and the pipeline center axis are concentric, and its end face is perpendicular to the pipeline axis; 2) The orifice plate , The axis of the downstream pressure-taking hole conforms to the distance from the orifice plate and the downstream end face of 25.4±0.8mm; 3) The axis of the pressure-taking hole should be perpendicular to the axis of the inner cylinder of the 2D measuring tube length on the downstream side of the orifice plate, and the angle between the axis of the pressure-taking hole and the outward inclination angle of the two ends of the orifice plate should not be greater than 3 Spend. The diameter of the pressure taking hole should not be greater than 0.08D; 4) The installation of the orifice plate requires front and rear straight pipe sections. The length of the straight pipe section is proportional to the form and diameter of the local resistance member on the upstream side of the orifice plate.βRelevant, its determination method is as follows: Table. The required length of straight pipe section between the orifice plate and the blocking piece (without flow regulator) The application of the orifice plate flowmeter is due to the difference of the measured medium, and the position of the pressure-taking port during installation There are also corresponding changes. 1. When the fluid to be measured is liquid, in order to prevent air bubbles from entering the pressure guiding pipe, the pressure taking port should be located at the center line of the process pipe.≤45°When the positive and negative pressure inlets are in the symmetrical position with the pipeline, the two should be on the same level; 2. When the measured fluid is steam, the condensate level in the condenser should be constant and the positive and negative pressure guiding pipes should be kept at a constant level. The height of the condensation surface is the same. When the positive and negative pressure ports are in a symmetrical position with the pipeline, the two should be on the same level. 3. When the fluid to be measured is gas, in order to prevent liquid (condensate) from entering the pressure guiding pipe, the pressure taking port should be located on the upper line of the central pipe of the process pipe.≤45°When the positive and negative pressure inlets are in the symmetrical position with the pipeline, the two should be on the same horizontal line; the above is the whole content of this article, you are welcome to inquire about the flowmeter selection and quotation of our factory. 'Precautions for installation of orifice flow meter and installation of pressure tap'

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