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『Jiangsu turbine flowmeter』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid flow meter)
1. The requirements for the use parameters of turbine flow meters are as follows:
The use parameters of turbine flow meters must strictly match the characteristics of the medium, working conditions, and installation requirements. The core of the core is to ensure measurement accuracy and instrument life. 1. Medium adaptation parameters Bi Chan • Liquid medium: viscosity should be ≤ 50mm ²/s, and when it is higher than 5 × 10 ⁻⁶ m ²/s, it must be calibrated with real liquid. Corrosive liquids must be used for instruments made of 316L or Hastelloy materials. • Gas medium: must be clean and dry, with impurities or easily condensable gases requiring the installation of precision filters, and not suitable for dirty media
2. Matching parameters for working conditions • Flow range: Liquid measurement should be maintained within the range of 10% -90%, gas is recommended to be 20% -80%, to avoid low flow rate failure or high flow rate wear. • Pressure and temperature: The working pressure and temperature should not exceed the rated value of the instrument (refer to the product manual for details, such as the common upper pressure limit of 1.6-6.4MPa). • Pipeline diameter: It must be consistent with the instrument diameter, and the length of the variable diameter section must be ≥ 10 times the pipe diameter when changing diameter
3. Accuracy and installation parameters • Accuracy level: Measurement level uses ≤± 0.5% FS, and industrial control can choose ± 1% FS. • Straight pipe section requirements: front straight pipe section 10D-15D (D is the pipe diameter), rear straight pipe section 5D, to ensure stable laminar flow of the fluid. Installation position: Horizontal or vertical installation (from bottom to
4. Output and environmental parameters • Signal output: Select pulse, 4-20mA or HART protocol according to system requirements. Explosion proof requirements: Explosion proof/intrinsic safety type (such as Ex d IIC T6) should be selected for explosive environments. Temperature adaptation: Insulation or heating kits should be selected for low-temperature environments, and expansion joints should be installed for high-temperature media to relieve thermal stress. (Note: Some pressure and temperature ratings may vary depending on the specific model, please refer to the latest product manual.)
2. Working principle of turbine flowmeter
The working principle of turbine flowmeter is based on fluid dynamics and electromagnetic induction principles, and the flow rate is achieved by measuring the impeller speed. The specific process is as follows
1. The fluid drives the impeller to rotate. After the fluid enters the sensor housing of the turbine flowmeter, it impacts the impeller blades.
. Due to the fixed angle between the blades and the flow direction of the fluid, the impulse of the fluid generates a rotational torque on the blades. The impeller begins to rotate after overcoming the frictional torque and fluid resistance, and when the torque reaches equilibrium, the impeller speed tends to stabilize. Key relationship: Under specific conditions (such as stable fluid viscosity and density), the impeller speed is directly proportional to the flui