Turbine Type Flow Meter for Liquid – Gas

Advantages of Turbine Flowmeter:

• High Precision: Turbine flowmeter has high measurement accuracy, which can usually reach the range of ±0.2%~±1%, and is one of the most accurate flowmeters.
• Good Repeatability: Its short-term repeatability can reach 0.05%. After frequent calibration, it can obtain very high accuracy.
• Stable Output Signal: Output pulse frequency signal, when connected with batch controller and flow display for signal processing, basically no error will be added.
• Wide Measurement Range: The range is wide, the maximum and minimum flow ratio can reach 6:1~10:1, and the medium and large caliber can even reach 40:1, which is suitable for the measurement of various fluid media.
• Fast Response Speed: Small inertia, fast response, time constant of 1ms~50ms, for pulsating flow with low change rate, the introduced error can be ignored.
• Simple Structure: It consists of turbine blades and sensors, which is easy to install and maintain.
• High Pressure and Corrosion Resistance: High pressure resistance, can be used for the measurement of high pressure fluid; the sensor is made of corrosion-resistant materials and can resist corrosion from general corrosive media.
• Multiple output modes: The output of the turbine flowmeter can be a frequency pulse or a digital signal, which can adapt to different application scenarios.
• No zero drift: Good anti-interference ability, no zero drift.

Disadvantages of turbine flowmeter:

• Requires regular calibration: The calibration characteristics cannot be maintained for a long time, and the calibration cycle is generally two years.
• Affected by fluid properties: Fluid properties (density, viscosity) have a great influence on flow characteristics, and compensation measures need to be taken according to the degree of influence.
• Sensitive to the distortion of the incoming flow velocity distribution and the rotating flow: The flowmeter is greatly affected by the distortion of the incoming flow velocity distribution and the rotating flow. A longer straight pipe section needs to be set on the upstream and downstream sides of the sensor. In theory, the front straight pipe section should be >10D.
• Not suitable for the measurement of pulsating flow and mixed-phase flow: Under pulsating flow and mixed-phase flow conditions, its measurement accuracy will be affected.
• High requirements for the cleanliness of the measured medium: Although filters can be installed to adapt to dirty media, pressure loss and maintenance will increase.
• Pressure loss: Inside the turbine flowmeter, the gas flowing through the blades will cause a certain amount of pressure loss, especially under high flow conditions, which may affect the pressure balance in the system.
• Affected by gas properties: The performance of the turbine flowmeter is greatly affected by the properties of the gas such as density and viscosity. The flow measurement results of different gases under the same conditions may be biased.
• Higher cost: Compared with some other flow measurement technologies, the manufacturing and maintenance costs of turbine flowmeters are higher.
• Flow noise: When high-speed gas flows through the blades of the gas turbine flowmeter, some flow noise may be generated. Especially in some scenarios with high environmental noise requirements, some measures need to be taken for noise control.