Gas flowmeter selection and installation method details

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A gas flow meter is an instrument used to measure the flow of gases. Gas flow meters are indispensable tools in many industrial and laboratory applications. In this article, we will introduce how to select and install the gas flow meter.

I. Selection of gas flow meter

Before selecting a gas flow meter, the following factors need to be considered:

1. Measuring range: gas flowmeter should be able to cover the required measurement of the flow range, usually in the selection of gas flowmeter, it is recommended to choose the measurement range is slightly larger than the actual needs of the model.

2. Measurement accuracy: accuracy is an important index of gas flowmeter, therefore, when choosing gas flowmeter, you should consider the accuracy demand, such as the need for high-precision flowmeter, you need to choose the model with higher accuracy.

3. Working conditions: When choosing a gas flowmeter, you should choose a suitable model according to the actual working conditions, such as pipeline pressure, temperature, gas composition and so on.

4. Use of the environment: the use of gas flowmeter environment should also be considered, such as whether the need for anti-corrosion, explosion-proof and other special features.

5. Price and cost-effective: different models of gas flowmeter prices are different, according to the actual demand and economic strength to choose, it is recommended to choose a more cost-effective models.

Second, the installation of gas flowmeter

1. Installation location selection: gas flowmeter installation location should be in the stable area of gas flow, in general, before and after the flowmeter should be kept 5 times the diameter of the pipeline above the straight line section, to ensure the stability and accuracy of the gas flowmeter.

2. Installation: The gas flowmeter can be installed in the pipeline upstream and downstream, and should be avoided as much as possible in the elbow, pumping stations and gates and other equipment upstream of the installation.

3. Installation requirements: When installing the gas flowmeter, the following aspects should be noted:

(1) pipeline preparation: the pipeline should be cleaned before installation to ensure that there are no impurities and dirt in the pipeline;

(2) Installation location: a flat, vibration-free ground should be selected to ensure the accuracy of the gas flowmeter;

(3) Installation direction: gas flowmeter should be installed correctly according to the flow direction;

(4) Fixing method: the gas flowmeter should be fixed in a suitable way to ensure that the flowmeter is fixed and stable;

(5) cable connection: the cable should be properly connected to the gas flowmeter to avoid signal interference and error.

4. Gas flowmeter debugging: after the installation is completed, the gas flowmeter needs to be debugged to ensure its normal operation. In debugging, should pay attention to the following aspects:

(1) power supply: check whether the power supply is connected correctly and whether the voltage meets the requirements;

(2) Signal output: check whether the gas flowmeter can output a stable and accurate signal;

(3) Zero calibration: carry out zero calibration to ensure that the output of the gas flowmeter is zero when no gas flows through;

(4) range calibration: carry out range calibration to ensure that the gas flowmeter can output accurate signals within the measuring range;

(5) gas characteristic calibration: for some gas flowmeter, it is necessary to carry out gas characteristic calibration to ensure that it can still output accurate signals when different gases flow through.

(5) Regular maintenance: In order to ensure the normal work of gas flowmeter, it is necessary to carry out regular maintenance, including cleaning, calibration and replacement of wearing parts. In the maintenance, should pay attention to the safety and operation standard.

In short, the gas flowmeter selection and installation methods for the accuracy and stability of gas flow measurement has an important impact on the need to select and install according to the actual needs and working conditions, but also need to debugging and regular maintenance to ensure its normal operation and long-term stability.