的主要测量元件为一根垂直安装的下小上大锥形玻璃管和在内可上下移动的浮子。 The main measuring element of the plastic tube rotor flowmeter is a vertically mounted lower and upper conical glass tube and a float that can move up and down inside. When the fluid passes through the conical plastic from bottom to top, a pressure difference occurs between the top and bottom of the float, and the float rises under the effect of this differential pressure. When this rising force, the buoyancy and viscous lift force of the float are equal to the gravity of the float, the float is in an equilibrium position. Therefore, there is a certain proportional relationship between the flow rate of the fluid flowing through the plastic rotor flowmeter and the rising height of the float, that is, the flow meter area of the plastic rotor flowmeter. The position height of the float can be used as a flow measurement.
Plastic rotor flowmeter is mainly used in chemical, petroleum, light industry, medicine, fertilizer, chemical fiber, food, dye, environmental protection and scientific research and other departments to measure the single-phase non-pulsating (liquid or gas) fluid flow. Anti-corrosive plastic rotor flowmeter is mainly used to detect the flow of corrosive liquids and gaseous media, such as strong acids (except hydrofluoric acid), strong bases, oxidants, strong oxidizing acids, organic solvents and other corrosive gases or liquids Flow detection of media
LZB-() S plastic tube rotor flowmeter cone and other main components are made of AS, ABS plastic, have good corrosion resistance, the product also has a reasonable structure, small size, light weight, cone tube is not easy to break, etc. Features, plastic tube rotor flowmeter can be widely used in chemical, environmental protection, food and other industrial sectors.
Principles and Structure
的主要测量元件为一根小端向下，大端向上垂直安装的锥形塑料管及其在内可以上下移动的浮子。 The main measuring element of the plastic tube rotor flowmeter is a conical plastic tube with a small end facing downward and a large end facing upward, and a float that can move up and down inside. When the fluid flows through the conical plastic tube from bottom to top, a pressure difference is generated between the upper and lower parts of the float, and the float rises under the action of this differential pressure. When the force that causes the float to rise is equal to the combined forces of gravity, buoyancy, and viscous force, the float is in an equilibrium position. Therefore, there is a certain proportional relationship between the flow rate of the fluid flowing through the flowmeter and the rising height of the float, that is, the flow area of the flowmeter. The position height of the float can be used as a flow measurement.
3. Installation  Before installation, the foam support in the instrument should be gently taken out with tool nose pliers, and then reinstalled. When installing, pay attention to whether the rubber gasket is installed in the groove of the pipe. To prevent water leakage.
 The interface of the flowmeter can be matched with ABS plastic pipe, or PVC plastic pipe, and connected with special glue, or it can be connected by plastic method, and then connected to the metal flange.
 The flowmeter must be installed vertically, without obvious tilt, and its installation height should be convenient for reading the float. When reading, the line of sight and the float should be horizontal. [General standard: The optimal flow rate required is 50% -70% of the maximum flow rate of the flow meter. Try not to use the highest number. A
 At the upstream and downstream of the meter, the inlet and outlet of the meter should ensure a straight pipe section with 5 times the meter diameter.
 The pressure of the bedding fluid must be stable. If the fluid is too unstable, it will cause the float to fluctuate and cannot be measured correctly. A buffer or a setter should be set upstream of the flowmeter.
 The plastic tube rotor flowmeter should be installed vertically, and the angle between the centerline of the flowmeter and the plumb line should not exceed 5 degrees.
使用〔1〕仪表使用时，应先缓慢开启上游阀门至全开，然后用流量计下游的调节阀调节流量。 Fourth, the use of plastic tube rotor flowmeter  When the meter is used, the upstream valve should be slowly opened to full open, and then the flow rate should be adjusted with the regulating valve downstream of the flowmeter. When the meter is out of use, close the upstream valve slowly, and then close the flow regulating valve downstream of the meter.
 The indication value of the meter is seen in the middle of the score line, and the indication value is read from the scale of the float according to the height of the float.
〔3〕 When the cone and float are contaminated, they should be cleaned in time.
 Regularly check the flowmeter for errors. Once it exceeds the specified error, the float and cone should be replaced or recalibrated to obtain better accuracy.
 When the measured fluid is inconsistent with the calibration medium of the flowmeter, the displayed value must be corrected.