Does the metal rotameter need temperature and pressure compensation?

Does the metal rotameter need temperature and pressure compensation?

 First of all, it is not necessary to introduce temperature and pressure compensation to measure the volume flow of gas. We use temperature and pressure compensation because the temperature and pressure of the pipeline often fluctuate, which will make the volume flow measurement most inaccurate, if the temperature and pressure is very stable or very small fluctuations, in the conversion of gas standard or steam mass flow can be completed in the DCS. Secondly, the measuring principle of the flowmeter is constant pressure difference, variable truncation and product (the throttle device is constant truncation blood product, variable pressure difference) , so the flowmeter can not be used under the working condition of the pressure fluctuates frequently, because the pressure fluctuates slightly, floating is very harmful to the tiger swing, or even damage the instrument, lost the significance of measurement, and sometimes measurement of gas, float before the need to install damping device. Therefore, the flow of the most non-sichuan temperature and pressure compensation, or if there is a need for temperature and pressure compensation, Sichuan Rotor flowmeter is not appropriate. The measuring accuracy of Metal Tube rotameter in order to ensure that the metal rotameter works normally and achieves the required measuring accuracy, the following points should be paid attention to: ● The metal rotameter must be installed vertically, flow from the bottom up through the flowmeter, and the vertical degree is better than 2 ° when the Horizontal Angle is better than 20; The metal is transferred to a straight pipe more than 5 times the diameter at the inlet of the flowmeter and 250 mm at the outlet. A magnetic filter should be installed if the medium contains ferromagnetic material. If the medium contains solid impurities, a filter should be considered between the valve and the pipe section, should ensure that the pipeline pressure is not less than 5 times the flow meter pressure loss, in order to make the floating stability。