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Precautions for installation of split type electromagnetic flowmeter
2026-07-21
Author:
Yanhe Machinery Fittings Factory
The controller of the split type electromagnetic flowmeter should be installed vertically, and the two-phase flow should move from top to bottom to consider the mixing of solid and liquid phases. The reason is that liquid substances (such as fine sand, crushed stone particles, etc.) in the material are prone to settling. There are many fish in the other pipeline, and if the wild grass shakes in the pipeline, the output of the flowmeter will oscillate back and forth. The oscillation of the wild grass hanging around the elevator will also make the output of the flowmeter unstable. Install alloy filters at the upstream and downstream outlets of the flowmeter to cut off fish and weeds and allow them to enter the measuring tube.
The use of a split type electromagnetic flowmeter to avoid improper pipeline settings can cause air pressure inside the controller. When closing the gate valves on the flowmeter and upstream, if the temperature of the two-phase flow is higher than the weather. After cooling, it is compressed, which poses a risk of generating air pressure due to the water pressure outside the pipe. The air pressure caused the liner to detach from the alloy conduit, resulting in electrical leakage.
Add an air pressure avoidance valve around the split type electromagnetic flowmeter, open the gate valve to connect to atmospheric pressure to avoid causing air pressure inside the controller. When there is a vertical pipeline connected upstream of the separated electromagnetic flowmeter and the residual amount is cancelled or adjusted using the upper and lower gate valves of the flow sensor, the controller measures the negative pressure generated outside the pipeline. To prevent air pressure, it is necessary to add back pressure or use upstream gate valves to adjust and close the margin.
The split type electromagnetic flowmeter has appropriate protection space, and large-scale flowmeters are installed in meter wells. In order to facilitate piping engineering, wiring, and regular inspection and protection, it is necessary to confirm the appropriate space. For the convenience of observation, wiring, and protection, the installation of the meter should have the required height to width ratio from the road surface, making it easy to clean and install.
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