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1. Which is a good Werabar flowmeter? Werabar flowmeter is a new type of flow measurement instrument with high precision specifically designed for measuring engine exhaust volume. The commonly used series of free instruments require a minimum flow rate for measuring fluid flow with the Velbar flowmeter. If the measured fluid flow rate is less than the minimum flow rate, the measurement accuracy will decrease by 3% to 5%. The minimum flow rate requirements for measuring with a Velbar flowmeter are shown in the table below: Performance indicators of the Velbar flowmeter probe, measurement accuracy: ± 1.0%, repeatability: ± 0.1%, maximum pressure: 10~20MPa (usually); 40MPa (special). Suitable temperature: -100~500 ℃, range ratio:>10:1, measurement lower limit: based on its output differential pressure (Pa) as the standard, gas (vapor) is 24.9; The liquid content of the main segment of the clan is 249.2; Steam is 373.8, measurement upper limit: The strength of different models varies, and their upper limits are also different. Applicable range: square tube, round tube, pipe diameter (span):, medium: various single-phase gas, liquid, and steam media of round tube and square tube under full tube conditions. The Weiliba flowmeter is combined with a differential pressure transmitter to form a flow detection system. The accuracy of flow detection in this system is directly related to each component of the system, so there are high requirements for the installation of the transmitter and pressure pipe. The installation requirements of the transmitter must be strictly implemented in accordance with relevant regulations to ensure the installation quality of the transmitter. Generally, it is necessary to consider selecting a suit
2. Construction of a uniform velocity tube flowmeter
The core of the uniform velocity tube flowmeter construction consists of three parts: an integrated sensor, a differential pressure transmitter, and an accumulator.
. 1. The integrated power bar sensor of the core measurement unit adopts a streamlined dual cavity stainless steel structure, and the surface is roughened to form a turbulent boundary layer. The high-pressure tapping hole is set on the metal curved surface at the front end of the probe, forming a high-pressure barrier to prevent particles from entering; The low-pressure tapping hole is located in front of the side rear airflow separation point, and the double row symmetrical layout greatly reduces the risk of blockage. The differential pressure transmitter of the signal conversion module precisely senses the pressure difference between the total pressure of the high-pressure chamber and the static pressure of the low-pressure chamber, which directly reflects the average flow velocity of the fluid. After temperature compensation and linearization processing within the m