Installation and precautions of oval gear flow meter

Abstract: The information on installation and precautions of oval gear flow meter is provided by excellent flow meter and flow meter manufacturers. The oval gear flowmeter is a precision instrument used to measure the flow of liquids. The product uses two counting mechanisms, mechanical display head and electronic display head, to display the table. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the installation and precautions of oval gear flowmeters. The oval gear flowmeter is a precision instrument used to measure the flow of liquids. The product adopts two counting mechanisms: mechanical display meter and electronic display meter. The display meter has the functions of displaying cumulative flow, instantaneous flow and zero return, which can realize on-site display and remote control. Installation of oval gear flowmeter 1. The pipeline should be thoroughly cleaned before installation, and a filter should be installed in front of the flowmeter to prevent debris from entering the flowmeter. When the liquid to be tested contains gas, an air separator should be installed. 2. It should be noted that the oval gear shaft of the flowmeter must be installed in a horizontal position, that is, the dial is perpendicular to the ground plane. To adjust the flow and start, the closed valve should be installed at the inlet and outlet ends of the flowmeter respectively. 3. The direction of the arrow on the flowmeter housing should be consistent with the liquid flow direction of the installed pipeline. 4. The pipeline of continuous process and the horizontal pipeline where the flowmeter is installed should be equipped with a bypass valve for regular cleaning and maintenance. On a vertical pipeline, the flowmeter should be installed in the bypass pipeline to prevent debris from falling into the meter. 5. Under the condition of correct installation of the flowmeter, in order to facilitate reading, the counter can be rotated 180 as required.°or 90° Precautions for oval gear flowmeter 1. The installation direction of the instrument should make the direction of the arrow shown on the instrument shell consistent with the direction of liquid flow, and the installation position should be paid attention to to facilitate reading. 2. The instrument should be installed at room temperature as much as possible, and should not be installed in the case of harmful gas and strong heat radiation, so as to prevent the damage to the counter part of the instrument. 3. The oval gear shaft in the instrument should be installed in a horizontal position as much as possible, that is, the reading plate should be installed in a vertical position (the front of the counter is parallel to the ground) to reduce the friction between the oval gear and the housing and reduce the wear of parts. Due to the different installation positions, in order to facilitate reading, the counter (head) can be rotated 90°or 180°. 4. Before the instrument is installed, the pipeline must be thoroughly cleaned. In the entire pipeline system, if there is no strict filtering device, a filter should be installed in front of the instrument to prevent impurities from entering the meter. 5. The meter should be installed at the outlet of the pump, and the flow control valve should be installed downstream of the meter. When using, first open the upstream shut-off valve, and then slowly open the downstream flow regulating valve or shut-off valve. It is strictly forbidden to open or close suddenly. 6. When the meter is in use, the meter should be filled with liquid. There should be no gas mixed in the liquid to be measured, otherwise the mixed volume of gas and liquid will be measured, which will make the measurement inaccurate. When the liquid is mixed with gas, a gas separator must be installed upstream of the instrument. 7. The flow rate in the pipeline should not increase or decrease sharply, and phenomena such as pipeline vibration, hydraulic shock and rapid pressure fluctuation should be avoided, otherwise it will affect the normal operation of the instrument. 8. When the flow exceeds the specified maximum flow, the wear of the oval gear increases with the increase of the speed, and the pressure loss increases sharply, so it should be avoided. Below the minimum flow rate, although it can still be measured, the error will increase. The starting flow of the flowmeter is about 2% of the maximum flow, and the normal working flow is 70%-80% of the maximum flow. 9. When measuring high-viscosity liquid, the liquid is generally heated to reduce the viscosity, and then circulated in the pipeline (both with a thermal insulation jacket type flowmeter). When the meter is out of use, the liquid filled in the meter becomes viscous due to cooling. If it is to be activated again, it must be heated outside the meter body with steam or other methods to reduce the viscosity of the liquid, and it can be used after the viscosity of the liquid in the meter is reduced. Otherwise, the mucus will bite the transmission parts and cause damage to the instrument. 10. The temperature of the liquid to be measured should not be higher than the specified value, otherwise, the meter will not work normally, or even stuck, and the counter part will be easily damaged under high temperature. Liquid temperature changes can also cause additional errors that are affected by viscosity. 11. Each instrument is calibrated with No. 0 diesel oil at room temperature when it leaves the factory. At room temperature, the viscosity of the oil is about 3mpa.s. If the viscosity of the liquid used by the user is quite different from this, it is necessary to adjust the gear ratio or flow coefficient. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Installation and Precautions of Oval Gear Flow Meter'

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