Flow meter bypass | Do valves need to be added before and after the flow meter

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1. Installation and use specifications for elliptical gear flowmeter

The installation and use of elliptical gear flowmeter should follow the following specifications to ensure measurement accuracy and equipment safety:

1. Preparation for pipeline flushing before installation. Before installation, the pipeline should be thoroughly flushed and a straight pipe section should be used to replace the position of the flowmeter to prevent welding slag, rust and other debris from entering the inside of the flowmeter.

. After flushing, check that there are no residual impurities in the pipeline before installing the flow meter. If the measured liquid has chemical corrosiveness, a stainless steel material (such as Ocr15Ni12MO2Ti) flowmeter should be selected to avoid corrosion damage to cast iron or steel materials. It is strictly prohibited to use water to calibrate flow meters made of cast iron or steel to prevent material corrosion or damage. Before installing the new flowmeter, gently push the gear several times from the outlet with a bamboo stick to confirm that the gear rotates flexibly. If the gear is stuck, it can be soaked in gasoline to remove any residual sediment after factory inspection.

2. Installation Specification Filters and Gas Separators Filters: Filters must be installed before the flowmeter, and the arrow direction on the filter housing must be consistent with the direction of liquid flow.

. Gas separator: When the measured liquid contains gas, a gas separator should be installed in front of the flowmeter to avoid gas affecting measurement accuracy. Installation direction and position: Horizontal gear shaft: Regardless of whether the pipeline is installed vertically or horizontally Flow meter bypass

, the elliptical gear shaft inside the flowmeter must be kept in a horizontal position (i.e. the dial is perpendicular to the ground) to ensure normal gear meshing. Reading adjustment: If the reading is difficult to observe after installation, the counter can be rotated 180 ° or 90 ° to facilitate data reading. Valve configuration throttle valve: installed at the inlet of the flow meter to regulate the flow rate. Open/close valve: Installed at the outlet of the flowmeter, it should be opened slowly during operation to avoid sudden pressure shock and damage to the gears. The flowmeter continuously used in the bypass pipeline needs to be equipped with a bypass pipeline for easy maintenance or replacement of the flowmeter without stopping the machine.

Thirdly, the working flow rate of the flow meter should not exceed the maximum value required by its technical specifications. The optimal working range is 50%~80% of the maximum flow rate to extend its service life and ensure accuracy.

. Medium restrictions prohibit the use of sweeping steam through flow meters, as high-temperature steam can damage gears and seals. If the liquid contains solid particles, it needs to be filtered in advance or a wear-resistant flowmeter should be selected. Regularly check the operation status of the flowmeter through operation monitoring, observe whether the gear rotation is smooth, and whether there are any abnormal noises or leaks. If abnormal readings are found in the flow meter, the machine should be stopped immediately to check if the filter, gas separator, or pipeline is blocked.

4. Maintenance and upkeep: Regular cleaning: Depending on the cleanliness of the medium, the flowmeter should be disassembled regularly to clean

Flow meter bypass | Do valves need to be added before and after the flow meter

1. Installation and use specifications for elliptical gear flowmeter

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