What are the installation precautions for vortex flowmeters?

The vortex flowmeter is a type of flowmeter that is sensitive to pipeline velocity distribution distortions, rotational flows, and flow pulsations. Therefore, great attention should be paid to the installation conditions of the pipeline on site, and the operating instructions should be strictly followed. 

The vortex flowmeter can be installed indoors or outdoors. If it is installed in a manhole, to prevent being submerged by water, a water-resistant sensor should be selected. The sensor can be installed horizontally, vertically or at an angle on the pipeline. However, when measuring liquids and gases, to avoid interference from bubbles and droplets, the installation position needs to be noted. 

The vortex flowmeter must ensure that there is an adequate length of straight pipe sections upstream and downstream. 

When connecting to the pipeline, pay attention to the following issues. 

The inner diameters D of the upstream and downstream piping are the same as that of the sensor, and the difference between them should satisfy the following condition: 0.95D ≤ D' ≤ 1.1D. 

② The piping should be concentric with the sensor, and the coaxiality should be less than 0.05D'. 

③ The sealing gasket should not protrude into the pipeline. Its inner diameter can be 1 to 2 millimeters larger than the inner diameter of the sensor. 

④ If a flow interruption inspection or cleaning of the sensor is required, a bypass pipeline should be set up. 

⑤ When installing on-site, reducing the impact of vibration on the vortex flowmeter should be given attention. One should try to avoid the vibration source, use elastic flexible hoses to connect in small diameters, and install pipe supports.
Complete installation includes straight pipe sections before and after, and the flow adjuster is a measure to ensure high accuracy of measurement. Assembly at the manufacturing plant can better guarantee the installation quality. 

When conducting electrical installation, it is important to connect the sensor and the converter with shielded cables or low-noise cables, and the distance should not exceed the specified limit in the user manual. During wiring, it should be kept away from high-power power lines and metal sleeves with separate protection should be used as much as possible. The "one-point grounding" principle should be followed, with the grounding resistance being less than 10Ω. Both the integrated type and the separated type should be grounded at the sensor side, and the grounding point of the converter's housing should be the same as that of the sensor.