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Today, our technical specialist from the manufacturer will explain to users what the installation requirements for elliptical gear flow meters are. We hope this will be helpful for everyone’s future use. 1. The ambient temperature and relative humidity should meet the specified requirements; generally, the temperature ranges from -15 to 50°C, while the relative humidity ranges from 10% to 90%. 2. Shading or heat insulation measures should be taken in areas exposed to direct sunlight. 3. Dust- and water-proofless flowmeters should be kept away from corrosive and humid environments. If it cannot be avoided, a slight positive pressure can be maintained by blowing clean air into the interior cavity. 4. Avoid areas with vibration and shock. 5. There should be sufficient space for installation and routine maintenance. 6. The elliptical gear flow meter should be installed horizontally and vertically; for rotor-type flow meters, the rotor shaft must be parallel to the ground (with the exception of those with a vertical rotor shaft). For other types, installation is generally horizontal as specified in the user manual. 7. The actual flow direction should be consistent with the direction indicated on the flow meter housing. Positive displacement flowmeters generally measure in one direction; a check valve is installed downstream of them when necessary to prevent damage to the flowmeter. 8. Flowmeters should not be subjected to pipeline expansion, contraction, deformation, and vibration; the system should be protected from vibration caused by improper design of valves and pipelines, with particular attention being paid to avoiding resonance. During installation, do not subject the flow meter to stress; avoid improper installations such as non-parallel flange planes on the upstream and downstream pipes, excessive distance between the flange surfaces, or misalignment of the pipes. This is especially true for positive displacement flowmeters that lack a separate measurement chamber and in which the pressure-bearing housing and the measurement chamber are integrated, as high installation stresses can cause deformation, affect measurement accuracy, and even jam the moving components. 9. Prevent impurities and heterogeneous fluids from entering the flow meter. The gap between the measuring chamber of a positive displacement flow meter and its moving sensing element is very small; particle impurities in the fluid can interfere with the proper operation of the flow meter, often leading to jamming or wear. A filter must be installed upstream of the flow meter and cleaned regularly; when measuring gases, protective devices such as sedimentators or water absorbers should be considered if necessary. When measuring liquids, it is necessary to prevent gas from entering the pipeline system; a gas separator should be installed if required. 10. Reduce the hazards of pulsating flow, shock flow, or overload flow. The flow meter should be installed at the outlet of the pump. Pulsating and shock flows can damage positive displacement flowmeters; an ideal flow source is a centrifugal pump or a surge tank. If a reciprocating pump must be used, or in locations where the pipes are prone to shock flows such as overload shocks and water hammer impacts, protective devices such as buffer tanks, expansion chambers, or safety valves should be installed. Overloading and operating a positive displacement flow meter at excessive speeds can cause harm; for example, the piping system may experience excessive flow rates. Therefore, protective devices such as flow restriction orifice plates, constant flow valves, or flow controllers should be installed downstream. 11. Non-flowing installation. Since the damage to the measuring components of positive displacement flowmeters can cause the pipeline flow to stop, parallel systems that can switch automatically should be used in environments where continuous production is required or where a disruption in flow must be avoided; alternatively, the flowmeters can be operated in parallel, so that if one fails, the other can still continue to function. 12. On-site calibration. If it is necessary to calibrate positive-displacement flow meters on-site using standard volume tubes, standard meters, and other flow standard devices, branch pipes, connection fittings, and stop valves should be pre-installed at appropriate locations on site. 13. The new pipeline must be cleaned before operation, and then rinsed with water. At this time, the shut-off valves before and after the flow meter should be closed first, allowing the liquid flow to pass through a bypass pipe; if there is no bypass pipe, a short pipe should be installed in place of the flow meter. 14. When switching the cleaning flow from the bypass pipe to the flow meter, the operation must be done slowly, especially when working with high-temperature and high-pressure pipes. After startup, ensure that excessive flow is not occurring; the optimal flow rate should be maintained at 70% to 80% of the upper limit to ensure the meter’s service life. 15. For filters, check whether the filter screen is intact promptly after trial operation. When the filter screen is clean and free of debris, record the pressure loss at normal flow rates; determine whether cleaning is necessary based on the degree of increase in pressure loss. 16. High-viscosity liquids generally need to be heated in order to flow. When the flow meter is taken out of use, the liquid inside it cools down and becomes thicker; when it is used again, it must be heated first so that the viscosity of the liquid decreases before allowing the liquid to flow through the flow meter. Otherwise, the moving components inside the meter may get stuck, causing damage to the flow meter. Flow metering is one of the components of metrological science and technology, and it is closely related to the national economy, national defense construction, and scientific research. Doing this work well plays an important role in ensuring product quality, improving production efficiency, and promoting the development of science and technology. Especially in today’s era of energy crises and an increasing degree of automation in industrial production, the significance and role of flow meters in the national economy have become even more evident.