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Turbine flow meter maintenance and repair
Turbine flowmeters are regularly maintained and maintained during use to ensure the normal and accurate operation of turbine flowmeters.
1. If it is a newly-purchased turbine flowmeter (within half a year) and troubleshooting of the flowmeter itself, it is recommended to check if there is a strong magnetic field around the fluid and if the fluid is stable (unstable rectifiers may be added).
2. If the turbine flowmeter is more than six months old, or the measured medium is not clean or corrosive, there may be wear on the bearings. A filter should be installed upstream of the flowmeter to replace the internal impeller of the turbine flowmeter. And it needs to be re-calibrated, because the repetitiveness of the turbine flowmeter generally cannot maintain the factory characteristics after six months.
3. The uneven distribution of flow rate and the presence of secondary flow in the pipe are important factors affecting the turbine. Therefore, it must be ensured that the straight pipe section before and after, upstream 20D, downstream 5D, in order to eliminate the secondary flow, should be installed rectifier.
4. Turbine has higher requirements for the cleanliness of the fluid. The addition of a filter in front of the flowmeter can ensure fluid cleanliness.
5, in order to ensure that the fluid is a single-phase, if necessary, installed upstream of the flow meter to install the air eliminator, for easy gasification of the liquid, the flowmeter downstream should ensure a certain back pressure, the size of the back pressure can take the largest flow sensor 2 times the pressure plus 1.2 times the vapor pressure of the liquid under test at the highest temperature.