How to use the orifice flow meter correctly

Abstract: The information on how to use the orifice flow meter correctly is provided by the excellent flow meter and flow meter production and quotation manufacturers. Orifice plate flowmeter is a high-range ratio differential pressure flow device composed of standard orifice plate and multi-parameter differential pressure transmitter (or differential pressure transmitter, temperature transmitter and pressure transmitter), which can measure gas, The flow rate of steam, liquid and lead is widely used in petroleum. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the article details on how to use the orifice flowmeter correctly. Orifice plate flowmeter is a high-range ratio differential pressure flow device composed of standard orifice plate and multi-parameter differential pressure transmitter (or differential pressure transmitter, temperature transmitter and pressure transmitter), which can measure gas, The flow rate of steam, liquid and lead is widely used in process control and measurement in petroleum, chemical, metallurgy, electric power, heating, water supply and other fields. The throttling device, also known as the differential pressure flowmeter, is composed of a primary detection part (throttling part) and a secondary device (differential pressure transmitter and flow indicator), which is widely used in gas. Flow measurement of steam and liquids. It has simple structure, convenient maintenance and stable performance. How to use the orifice flowmeter? How to use the orifice flowmeter correctly? What are the precautions for the use of the orifice flowmeter? Compensated new generation flowmeter adopts advanced microcomputer technology and new micro-power consumption technology, with strong function, compact structure, simple operation and convenient use. The orifice flowmeter consists of three parts: sensing, transmission, and operation display. It is mainly suitable for industrial measurement of saturated steam, superheated steam, compressed air, mixed non-flammable and explosive gases and hot water. Flow measurement and display of the above fluids , measurement and online automatic control of the production process can be used. The most important thing to pay attention to when putting into operation is that the pressure guiding pipe must be filled with water or injected with high temperature steam to cool before starting operation. The straight pipe section before and after the throttling part of the orifice flowmeter must be straight, and the straight pipe section used to install the throttling part should be smooth. If it is not smooth, the flow coefficient should be multiplied by the roughness to correct the sparseness. A sufficiently long straight pipe section is required before and after the throttling piece, and the upstream side of the throttling piece is an open space or diameter≥In the case of a 2D large container, the length of the straight pipe between the open space or the large container and the throttle shall not be less than 30D (15D). If there are other local resistance parts between the throttling part and the open space or the large container, in addition to the specified minimum straight pipe length 1 between the throttling part and the local resistance part, from the open space to the junction The total length of the straight pipe section between the flow parts shall not be less than 30D (15D). How to use the orifice flowmeter correctly: The following is a detailed description for everyone: 1. The pressure guiding pipe system is filled with cold water as the pressure guiding medium, and the measurement of high temperature steam is generally conducted through the cold water. When the pipeline is not transporting steam, open the primary valve, pressure valve and balance valve, close the drain valve, and directly inject cold water from the water injection hole of the condensate tank until it is fully filled. Of course, the balance valve and pressure valve can also be closed, and the valve can be opened once to introduce high-temperature steam and slowly cool it into water. This method is generally not used because the steam temperature is too high and it is easy to damage the instrument. Special attention should be paid to the measurement of high temperature steam when the pressure guiding pipe is not filled with water or the temperature is very high and it is strictly prohibited to put it into operation. Measured compressed air and cold water directly use the medium pressure. 2. Adjust the zero-point migration of the pressure transmitter. Since the water column in the pressure guiding pipe generates an additional pressure, the pressure indicator must have additional readings. It is necessary to zero-adjust this additional pressure, which is called zero-point migration. Specific methods: close the primary valve, open the pressure valve, and turn on the power supply. Open the housing of the pressure transmitter and adjust the migration screw so that the output of the pressure indicator is zero. 3. After the differential pressure transmitter is exhausted or drained, after the pressure guiding pipe is filled with water, sometimes a small amount of gas will accumulate in the pressure chamber of the differential pressure transmitter to affect the pressure guiding, which must be eliminated. Unscrew the bolts at the lower part of the positive and negative pressure chambers to drain the fluid. Generally, instruments newly put into operation do not need to be drained. Check that there is no leakage in the pressure guiding pipeline system, close all valves, and prepare to put into operation. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'How to use the orifice flow meter correctly'

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