Key points in the installation of the flowmeter

Key points in the installation of the flowmeter

Flow measurement is one of the components of metrology science and technology. It has a close relationship with the national economy, national defense construction, and scientific research. Doing this work will play an important role in ensuring product quality, improving production efficiency, and promoting the development of science and technology, especially in the current era of energy crisis and industrial automation. Flowmeters are in the national economy. The status and role of the more obvious.

Flow meters are widely used in various fields of national economy such as metallurgy, electric power, coal, chemical, petroleum, transportation, construction, textile, food, medicine, agriculture, environmental protection and people's daily life. They are developing industrial and agricultural production and saving energy. Important tools to improve product quality and improve economic efficiency and management level play an important role in the national economy. Here are a few simple points to describe the installation of the flowmeter:

1. Requirements for the external environment:
The flowmeter is preferably installed indoors. When it is installed outdoors, it must be protected from sun, rain and lightning to avoid affecting the service life. The flowmeter should be installed in a place where it is easy to maintain without strong electromagnetic interference and heat radiation.
2. Requirements for the bypass pipe:
In order to ensure that the flowmeter does not affect normal production during maintenance, a shut-off valve (shut-off valve) should be installed on the pipe before and after the flowmeter, and a bypass pipe should be installed. The flow control valve should be installed downstream of the flowmeter. When the flowmeter is in use, the upstream shut-off valve must be fully open to avoid unstable flow in the upstream part of the fluid.
3. Requirements for straight pipe sections:
The flowmeter must be installed horizontally on the pipeline (the pipeline is inclined within 50). When installing, the flowmeter axis should be concentric with the pipeline axis and the flow direction should be consistent. The length of the pipeline upstream of the flowmeter should have a straight pipe section of not less than 2D. If the installation site allows the upstream straight pipe section to be 20D and the downstream to be 5D. The inner diameter of the upstream and downstream piping for the flowmeter installation point must be the same as the inner diameter of the flowmeter.
4. Requirements for impurities in the medium:
In order to ensure the service life of the flowmeter, the filter should be installed in front of the straight pipe section of the flowmeter.
5. Requirements for installation welding:
When installing a flow meter (such as a vortex flowmeter), the user needs to have a pair of standard flanges welded to the front and rear pipes. It is not allowed to weld with a flow meter! The gasket between the flanges should not be recessed into the pipe during installation. Before installing the flowmeter, the welding slag and other dirt in the pipeline should be strictly removed. For the debris in the pipeline, such as: debris, welding slag, stones, dust, etc., it is recommended to install an automatic filter with 5 micron mesh upstream to block the droplets and sand. . It is best to use a pipe of equal diameter (or a bypass pipe) instead of a flow meter to purge the pipe. To ensure that the flowmeter is not damaged during use.

6, The flowmeter grounding requirements:
The flowmeter should be grounded reliably and cannot be shared with the ground of the high-power system.
7. Requirements for explosion-proof products:
In order to safely and normally use the flowmeter (such as electromagnetic flowmeter), it should be checked whether the use environment of the explosion-proof flowmeter is consistent with the requirements of the user's explosion-proof requirements, and the installation and use process should strictly abide by the requirements of the national explosion-proof product. Change the connection mode of the explosion-proof system, and do not open the meter at will.

8, For the flow range requirements:
The selection is within the specified flow range to prevent overspeed operation to ensure the desired accuracy and normal service life.

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