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technical article
Glass rotor flowmeter should be checked for technical parameters before installation
2012-4-10 14:03:14

的主要测量元件为一根垂直安装的锥形玻璃管及在内可上下移动的浮子。 The main measuring element of the glass rotor flowmeter is a vertically mounted conical glass tube and a float that can move up and down inside. The cone tube is at the end, and when the fluid passes through the cone glass tube from bottom to top, a pressure difference occurs between the upper and lower parts of the float, and the float rises under the effect of this differential pressure. When the force that causes the float to rise is equal to the combined forces of gravity, float, and viscous force, the float is in a balanced position. Therefore, there is a certain proportional relationship between the flow rate of the fluid flowing through the glass tube rotor flowmeter and the rising height of the float, that is, the flow meter area of the glass rotor flowmeter. Corrosion-resistant series of glass rotors are mainly composed of a conical glass tube, a float, upper and lower bases and supporting members.


Dongxiang Instrument LZB is a domestic system with strong versatility, simple structure and convenient maintenance. Segmented measurement, flexible measurement range, and small flow can be measured. The test body is made of various materials and can measure corrosive media. With a regulating valve below DN10, it is convenient for users. 在使用安装前,应先检查技术参数如:测量范围,精确度等级,额定工作压力,温度等参数是否符合使用要求。 There are the following requirements during installation and use: 1. Before using the glass rotor flowmeter , check the technical parameters such as: measurement range, accuracy level, rated working pressure, temperature and other parameters that meet the requirements for use. 2. Before installation, remove the top lining which is used for transportation protection. And check the cone tube for damage, whether the float can move up and down freely, and it can be installed only after it is normal. 3. The newly installed pipeline should be flushed clean. 4. Make the minimum graduation value of the rotor flow meter below and install it vertically on a pipe without vibration. The angle between the center line of the rotor flow meter and the plumb line should not exceed 5 degrees. Large-caliber flowmeters are heavy. To avoid pipe bending, measures such as reinforcement and support can be taken if necessary. 5. During installation, the rotor flowmeter should be protected from excessive external force, such as pressure and torque. 6. If necessary, install a filter upstream of the rotor flowmeter to block the rotor flowmeter according to different working conditions in use to prevent contamination by impurities. 7. If the fluid is unstable and has a pulsating flow, a buffer can be installed to ensure the good measurement of the rotor flowmeter to eliminate the pulsating flow. 8. When the rotor flowmeter is in use, slowly open the control valve on the upstream pipe of the flowmeter, and then use the regulating valve to adjust the flow rate, so as to avoid the sudden rise of the float and the damage to the cone tube. 9. In order to obtain accurate measurement accuracy, it is recommended that the common flow rate of the measured fluid should be more than 60% of the graduated flow rate of the rotor flow meter.


的选用可从以下几个方面考虑。 The selection of glass rotor flowmeter can be considered from the following aspects. 1. The object of measurement. That is to measure the type of medium, pressure, and chemical properties. For liquid and gaseous media, for corrosive media, a corrosion-resistant flowmeter should be selected. 2. The performance of the flow meter itself. After the above conditions are determined, generally speaking, if there is no major change in price, the needle valve is preferred to be placed on the upper part of the flowmeter; those with larger flow holes are directly flow scaled; simple structures; smaller external dimensions, etc. . If it is a small flow range, you can use the ball float type, because it is stable during measurement, not easy to accumulate dust, high accuracy, and good interchangeability. 3. Choose according to price. Generally speaking, high accuracy and high price. To select the accuracy level of the instrument according to the measurement purpose, if you only need to control the throughput of the measurement medium and adjust it after trial operation, you must always stabilize the throughput in the future, then the accuracy is secondary. The glass rotor flowmeter is a kind of instantaneous flow measuring instrument which is simple to use, convenient to read and very versatile. Jiangsu Jinhu Dongxiang Flowmeter Instrumentation needs to consider the requirements of the measurement medium when arranging the selection of flowmeter products. For example, the selection of electromagnetic flowmeters will be more specific and detailed. More knowledge can be stored in this site for later updates More information and price attention.