Gas waist flow meter installation steps explain, welcome to inquire
2021-05-15
Gas waist-wheel flowmeter as a positive displacement measuring instrument has a long history, with its high accuracy, wide range, small size, light weight, easy installation and maintenance, reliable use and durable service life and other characteristics, widely used in natural gas, coal-to-gas, -inert gas, air and other gas flow measurement, is domestic and foreign urban gas. Ideal flow metering device for chemical industry, scientific research and other departments in oilfield.
In this article, the installation steps of the gas waist flowmeter are simply explained for you:
1. the installation of the flow meter should be removed the import and export packaging, must prevent granular impurities fall into the measuring room, such as the measuring room table coated with anti-rust oil, can be washed with gasoline or kerosene, and strictly Jingchu pipeline magazine, the flow meter should be installed filters and filters, to prevent rust slag, welding slag and other impurities into the measuring room.
2. when the flow meter is installed, the logistics inlet and outlet are vertical or horizontal positions, and the rotor axis should be kept as horizontal as possible.
3. when the gas pressure fluctuation range is large, in order to ensure the measurement accuracy, the upstream of the flow meter should be installed voltage regulator.
4. in order to prevent the newly installed pipe rust slag, welding slag and other impurities into the flow meter, the user should first install the pipe on the installation position of the flow meter, ventilation for a period of time, to ensure that there is no large particle impurities, and then replace the quantity meter. If the pipe is welded, the transition pipe should be used, and the flow meter should not be welded directly.
5. the installation of the flow meter has two forms, import and export vertical installation and import and export horizontal installation. It is recommended to install the flow meter vertically, when the gas flow is upward and downward, so that the rotor has self-cleaning ability for impurities in the pipeline during installation, to reduce maintenance, improve service life and ensure measurement accuracy. In special cases, horizontal installation (also known as left in right out) can be taken, and the installation flow timing should be set up before and after the door valve and by-pass pipeline to ensure that maintenance, no need to stop gas.
6. the flow meter installation pipe distribution pipe and pipe fittings size must be appropriate, installation flow timing, should ensure that the center of the flow meter and the center of the pipeline alignment, no dislocation, and the flow meter body to withstand abnormal distortions (including axial and radial).
7. After installation, unscrew the plug on the back cover and turn the rotor with an Allen wrench to check whether the rotor rotates freely. If the rotor rotation is blocked, the instrument should be removed, ~ stolen goods. Then reinstall, after the rotor freely rotate, screw on the plug.
8. After the correct installation of the flow meter, inject special lubricating oil into the middle line of the oil window from the oil filling button (note that you cannot add more), and check regularly or irregularly during use to ensure the adequate cleanliness of the lubricating oil. If the lubricating oil is found to be black or the oil level is higher than the middle line of the oil window, it indicates that the lubricating oil has deteriorated or has impurities, and the new lubricating oil should be replaced at this time. If the oil level is 3MM lower than the middle line of the oil window, it indicates that the lubricating oil is lost and the middle line of the oil window needs to be replenished. When filling lubricating oil, the valve before and after the flowmeter must be closed, and the gas in the flowmeter must be drained before filling lubricating oil.
9. when the flow meter is put into operation, first open the bypass valve and the flow meter outlet valve, slowly open the inlet valve, the flow meter runs for a few minutes at a small flow rate, and listen to whether there is an abnormal sound, after the flow meter starts normally, gradually close the bypass valve, adjust the outlet valve a certain opening, is the flow meter under normal operation. Note: The opening and closing operation of the door valve must be slow to prevent the strong impact of the air flow and damage the flowmeter.
10. After the flow meter is put into operation for a period of time, if the filter pressure drop is found to increase, the filter should be cleaned or the filter medium replaced; If it is found that the pressure drop of the flowmeter increases and the initial flow rate increases, the measuring chamber can be washed with clean gasoline or gas.
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