A liquid turbine flow meter is a relatively precise flow measurement instrument. As the name suggests, a liquid turbine flow meter can only measure liquid media. This instrument is widely used in flow measurement in chemical, petroleum, metallurgy, water treatment, scientific research, environmental protection and other fields. Famit liquid turbine flow meters equipped with sanitary fittings can also be used in the pharmaceutical field.
Turbine flow meters are velocity-type flow meters. Due to their wide range of applications, they are among the most widely used measuring instruments. They are moderately priced and ideal for fluids with moderate and stable flow rates, and are clean and low in viscosity. They measure the flow rate of liquids, gases, and vapors in pipelines, such as chemicals, water, cryogenic liquids, air, and industrial gases like natural gas. Higher-precision turbine flow meters can also measure hydrocarbons, including natural gas for trade. In addition, they are used in the water, oil, and chemical industries. Water applications include distribution systems within and between water areas. Oil applications include the trade of hydrocarbons. Other applications can be found in the food and beverage and chemical industries.
1. Only suitable for low-viscosity single-phase fluids:
Through practical application and verification, it was found that when measuring low-viscosity media, the instrument coefficient of the turbine flow meter hardly changes with the flow rate. However, as the viscosity of the measured medium increases, the linearity of the turbine flow meter deteriorates, and the instrument coefficient changes significantly with the flow rate, making it difficult to achieve the required measurement accuracy. When the measured medium is a gas-liquid two-phase flow, the medium velocity becomes very unstable, resulting in a large measurement error.
2. The medium fluid measured by the turbine flow meter should be in a turbulent state:
According to the flow characteristics of turbine flow meters, when the medium is in a laminar flow state, the instrument coefficient changes significantly with the flow rate; when the medium is in a turbulent flow state, the instrument coefficient hardly changes with the flow rate. To ensure the measurement accuracy of turbine flow meters, the measured medium should be in a turbulent flow state.
3. Generally only used for measuring media with high cleanliness:
Most turbine flow meters use spherical bearings, which places high demands on the cleanliness of the measured medium. Particulate impurities in the medium will cause rapid bearing wear, while fibrous impurities will become entangled on the turbine blades, affecting the normal rotation of the turbine. In practical applications, an effective filter should be installed upstream of the turbine flow meter.
