Flow meter scale selection principle

Abstract: the flow meter scale selection principle of the information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Flowmeter selection is to point to in accordance with the requirements for production, starting from the actual situation of instrument product supply, synthetically considering measuring safe, accurate and economical efficiency, and according to the nature of the current body condition determine the flow sampling device and flow type and measuring instrument. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a meter scale selection principle article details. Flowmeter selection is to point to in accordance with the requirements for production, starting from the actual situation of instrument product supply, synthetically considering measuring safe, accurate and economical efficiency, and according to the nature of the current body condition determine the flow sampling device and flow and measuring instrument type and specification. The flow measurement of safe and reliable, the first is a reliable measurement way, that will not happen in the operation of the sampling device in the electric circuits of the mechanical strength or failure caused by the accident; 2 it is measuring instrument both under the condition of normal production or malfunction does not affect the safety of production system. For power plants, for example, high temperature and high pressure main steam flow measurement, a measuring element in its installation in the piping must be strong, to ensure that the damage will not occur mechanism under high speed steam flow washed away. Generally preferred to choose the standard throttling device, therefore, not choose double cantilever beam type horn tube or insert flowmeter and other non-standard devices, as well as the structural strength low target type, turbine flowmeter, etc. Fuel power plants and combustible gas in the situation, should choose explosion-proof type instrument. Flowmeter selection is to point to in accordance with the requirements for production, starting from the actual situation of instrument product supply, synthetically considering measuring safe, accurate and economical efficiency, and according to the nature of the current body condition determine the flow sampling device and flow and measuring instrument type and specification. The flow measurement of safe and reliable, the first is a reliable measurement way, that will not happen in the operation of the sampling device in the electric circuits of the mechanical strength or failure caused by the accident; 2 it is measuring instrument both under the condition of normal production or malfunction does not affect the safety of production system. For power plants, for example, high temperature and high pressure main steam flow measurement, a measuring element in its installation in the piping must be strong, to ensure that the damage will not occur mechanism under high speed steam flow washed away. Generally preferred to choose the standard throttling device, therefore, not choose double cantilever beam type horn tube or insert flowmeter and other non-standard devices, as well as the structural strength low target type, turbine flowmeter, etc. Fuel power plants and combustible gas in the situation, should choose explosion-proof type instrument. On the basis of guarantee the safe operation of the instrument, and strive to improve the accuracy of the instrument and energy saving. Therefore, not only to choose display instrument that could satisfy the requirement of accuracy, but also to choose according to the characteristics of the measured medium reasonable way of measurement. Main generator steam flow measurement, because of its safety and economical efficiency of the coal-fired power plant is crucial, generally USES the mature standard throttling the load with differential pressure flowmeter, chemical water treatment of sewage and fuel respectively belong to the dirt flow and low viscous flow Reynolds number, don't apply standard throttling. Of dirt flow generally selected segmental orifice and other non-standard throttling with differential pressure gauge or ultrasonic doppler flowmeter, and viscous flow can target type or cuneate, displacement and flow meter, etc. Population of water turbine, condenser circulating water and heat recovery unit of heat recovery steam etc are all big diameter ( More than 400 mm) Flow measurement parameters and to create difficulties and pressure loss is big, do not choose standard throttling device. In order to guarantee the service life of the meter and the accuracy, also note the instrument model selection of the vibration control requirements. In hot and humid region should choose wet and heat meter. To correctly choose the specifications of the instrument, but also to ensure the service life of the instrument and the accuracy is important one annulus. Should pay special attention to static pressure and temperature resistant selection. 25 times, in order to make sure no leak or an accident. Span the range of choice, mainly instrument calibration limit choice. Choose the small, easy to overload, damage the instrument; Choose the big, impedes the accuracy of the measurement. Three times. Installed on the production line long running contact instrument, should also consider the energy loss caused by the flow measurement device.

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