Measuring the Flow of Fuel/LPG Products

This is a volumetric fuel/LPG flow meter, commonly used for measuring oil loading and unloading in trucks. When the LPG passes through the flow meter, a certain pressure difference will be generated between the inlet and outlet of the flow meter. The rotating part of the flow meter (referred to as the rotor) rotates under the action of this pressure difference and discharges the fluid from the inlet to the outlet. In this process, the fluid fills the "metering space" of the flow meter again and again, and then is continuously sent to the outlet. Under given flow meter conditions, the volume of the metering space is determined. As long as the number of rotations of the rotor is measured, the cumulative value of the volume of the fluid passing through the LPG flow meter can be obtained. The application principle is to use a mechanical measuring element to continuously divide the fluid into single known volume parts, and measure the total volume of the fluid according to the number of times the measuring chamber is repeatedly filled and discharged with the fluid in the volume part. ‌The fuel flow meter is directly installed in the vehicle's oil pipe system as a frontier station for fuel consumption monitoring. It uses the principles of fluid dynamics to achieve real-time and continuous fuel consumption monitoring by measuring the volume or mass change of fuel flowing through the pipeline. It is suitable for liquid or gas flow measurement in small and medium-caliber pipelines, especially in situations where the cumulative flow or instantaneous flow needs to be directly displayed. Due to its mechanical structure, it may have certain requirements for the cleanliness of the fluid and is not suitable for fluids with high viscosity or particles. This direct measurement method ensures the immediacy and high accuracy of the data, and is particularly suitable for scenarios where the current fuel consumption status of the vehicle needs to be accurately grasped, such as long-distance transportation, fleet management, etc. The main function of a mechanical fuel flow meter is to measure the flow of fuel, thereby helping users to accurately grasp the fuel consumption. Mechanical fuel flow meter is a volumetric flow meter used to measure the flow of liquid in a pipeline.

Mechanical fuel flow meter adopts micro processing technology, and has the advantages of strong functions, wide flow range, simple operation and maintenance, easy installation and use, and the main technical indicators have reached the level of similar foreign products. Mechanical fuel flow meter is a light volumetric flow meter with a pointer display that can display instantaneous flow and cumulative flow, and the cumulative flow can return to zero. Fuel flow meter is a volumetric flow meter that measures the total flow of liquid flowing through the pipeline. The meter has high measurement accuracy, is less affected by liquid viscosity, and does not require a straight pipe section to be installed in front of the meter.‌

Measurement principle

‌The mechanical PD fuel flow meter indirectly calculates the flow rate by measuring the rotation speed of the internal mechanical parts (such as turbines and oval gears) driven by the flow of fluid. When the fluid flows through the flow meter, its kinetic energy drives the internal parts to rotate, and the rotation speed is proportional to the flow rate of the fluid. By measuring the rotation speed of these parts, the flow rate of the fluid can be calculated. ‌

Application scenarios

‌Mechanical fuel flow meters are widely used in various scenarios that require accurate measurement of fuel consumption, including:

‌Long-distance transportation‌: In long-distance transportation, real-time monitoring of fuel consumption can help timely detect abnormal fuel consumption, prevent fuel waste and oil theft, and optimize vehicle maintenance and cost control. ‌

Fleet management‌: In fleet management, flow meters can provide real-time fuel    consumption data to help managers reasonably arrange vehicle scheduling and refueling plans and improve operational efficiency. ‌

Industrial fuel metering‌: Although mainly used for fuel, mechanical Flow meters are also commonly used in household water meters and industrial water metering, especially in situations where low cost and high reliability are required.

Advantages and Disadvantages

Advantages:

1. Simple structure: Mechanical flow meters have a simple structure and low cost, making them suitable for large-scale applications.

2. High reliability: Due to their mechanical structure, they can work properly even in an environment without electricity or with low power consumption.

Disadvantages:

1. Accuracy is affected: Impurities in the fluid may affect the measurement accuracy, requiring regular maintenance and cleaning.

2. Limited scope of application: Suitable for clean liquids, poor measurement results for liquids containing solid particles or fibers.

Installation precautions:

1. The actual system working pressure shall not exceed the working pressure of the gasoline flow meter.

2. The material of the measuring part, the internal material and the float material shall be compatible with the measuring medium;

3. The ambient temperature and process temperature shall not exceed the maximum use temperature specified by the fuel transfer flow meter;

4. It must be installed vertically on the pipeline to ensure the measurement accuracy.

5. The rated size of the flow meter flange must be the same as the pipeline flange.

6. To avoid deformation caused by the pipeline, the matching flange must be in a free state to eliminate stress;

7. To avoid pipeline vibration and minimize the axial load of the flow meter, the pipeline should be supported by a firm bracket;

8. The shut-off valve and control flow must be downstream of the PD flow meter.