Flowmeter selection example
It is known that the actual working pressure of a certain gas supply pipeline is (gauge pressure) 0.8MPa~1.2MPa, the medium temperature range is -5C~+40C, and the gas supply volume is 3000~8000Nm2/h (standard flow rate), regardless of natural gas In the case of components, it is required to determine the specification and model of the flowmeter.
Analysis: The flow range given in Table 6.1 of the manual is the flow range of the working condition, while the flow range given in this example is the flow range of the standard condition.
Therefore, according to the gas state equation, the standard flow rate must be converted into the working condition flow rate first, and then the appropriate caliber should be selected.
The gaseous state equation is as follows:
The data in Table 6.2 is for reference only. The data are calculated based on the true relative density of natural gas Gr=0.600, and the mole fractions of nitrogen and carbon dioxide are both 0.00. When the medium pressure is lower than 0.5MPa, they can be estimated by Zn/Zg=1.00 .
calculate:
0 When the medium pressure is the lowest (0.8MPa) and the temperature is the highest (+40°C) (in the peak period of gas supply), it should have the largest standard volume flow rate (you can temporarily ignore the influence of FZ when selecting the model, and the local atmospheric pressure is 101.325 kPa):
Table 6.1 The conversion coefficient C value calculated according to the gas state equation
Table 6.2 Gas compression factor Fz value
Supporting products: LQW series gas filter
LQW series gas filter is a product produced by our company specially for the gas turbine flowmeter, which meets the installation requirements of the flowmeter.
According to statistics, the installation of LOW series gas filters can effectively avoid the damage of the flowmeter due to the impact of impurities, and reduce the failure rate of the instrument by more than 90%. It is one of the essential equipment for gas metering sites.
LQW series gas filter is also suitable for various pressure regulating devices, it is an important equipment to filter out dust and impurities in the gas and ensure the normal operation of various gas equipment.
Features
Large filtration area, small pressure loss, strong corrosion resistance;
The filter effect is good and the conduction ability is strong;
The filter chip can be cleaned many times and has a long service life;
Compact structure, easy maintenance;
Movable flange, easy to install;
Comes with drain valve.
Technical Parameters
Product size unit (mm)
