Technical requirements for the installation of turbine flowmeters

Turbine flowmeter has some advantages such as high accuracy, good repeatability, wide range, compact and light structure, convenient installation and maintenance, large flow capacity, suitable for high pressure measurement, no need to open holes on the meter body, etc., and can realize quantitative control, over-measurement Alarm and other functions, it is an ideal instrument for flow measurement and energy saving. However, some requirements and methods also need to be paid attention to in the installation of the turbine flowmeter. For installation and welding, a pair of standard flanges shall be welded on the front and rear pipes first, and no flowmeter shall be used for direct welding. Impurities such as welding slag in the pipeline should be removed before installation. It is best to use a pipeline (or bypass pipe) of equal diameter to replace the flowmeter to purge the pipeline. To ensure that the flowmeter is not damaged during use. When installing the flowmeter, the sealing gasket between the flanges cannot be recessed into the pipe. The turbine flowmeter must be reliably grounded and cannot be shared with the ground wire of the heavy current system. For explosion-proof products, for the safe and normal use of the instrument, whether the use environment of the explosion-proof flowmeter conforms to the user's explosion-proof requirements, and during installation and use, it should strictly abide by the national requirements for the use of explosion-proof products, and the user is not allowed to change the connection of the explosion-proof system Do not open the instrument arbitrarily. The type selection is within the specified flow range to prevent overspeed operation, so as to ensure the ideal accuracy and normal service life. The debris in the pipeline should be cleaned before installation of the turbine flowmeter: debris, welding slag, stones, dust, etc. A 5 micron mesh filter upstream is recommended to hold back liquid droplets and sand particles. When the flowmeter is put into operation, the front valve should be opened slowly first, and then the rear valve should be opened to prevent the turbine from being damaged by the impact of the instantaneous air flow. Lubricating oil should be operated according to the notice board, and the frequency of refueling depends on the cleanliness of the temperament, usually 2-3 times a year. Overspeeding of the turbine due to pressure testing, purging of pipes or exhaust, and operation of the turbine in reverse flow can damage the flowmeter. When the flowmeter is running, it is not allowed to open the front and rear covers arbitrarily to change the relevant internal parameters, otherwise it will affect the normal operation of the flowmeter. Install the gasket carefully, making sure no protrusions enter the pipe to prevent interference with proper flow measurement. When the flowmeter is calibrated, the pressure should be collected on the pressure port of the flowmeter. The transmitter should be installed horizontally, avoid vertical installation, and ensure that there are suitable straight pipe sections before and after it, generally 10D in the front and 5D in the back. Finally, the measured medium must not corrode the turbine, especially the bearing, otherwise measures should be taken. Good pre-installation preparations will definitely bring convenience to daily use. Good installation and use methods will not easily cause damage to the instrument, this is for sure.

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