Cross-sectional flow meter principle and application characteristics

Cross-sectional flowmeters Because there are not enough straight sections, the flow rates through the points in the cross-section of the pipeline are different. It is difficult to find a point that can represent the average flow rate. The actual wind speed distribution also has no certain rules to follow. We divide the size of the rectangular or circular pipe into an equal number of small cells. Measure the flow velocity at the center point of each cell and then measure the flow rate and average value of all the small cells. It is the entire cross-sectional area. The average flow rate is the velocity area method. The more the unit area is divided, the more accurate the flow rate measured by the cross-sectional flowmeter.
Power plant coal-fired boiler load, pulverized coal volume and air distribution need to be realized on-line monitoring and automatic control, so that the first and second air distribution of the boiler is reasonable, and the wind speed in each air duct is uniform, which ensures stable boiler combustion and improves efficiency for the production process. Technical analysis and economic accounting are very necessary. The cross-section air flow measurement device is a novel structure flow sensor designed and manufactured based on the measurement principle of the speed area method. It measures the area of ​​the cross section of the measuring section of the closed pipe (circular, rectangular or other profiled section) and the average flow rate of the fluid through this area. It is installed inside the pipe according to its shape and size. Multiple unique structure detection devices. The average differential pressure was obtained by pressure equalization. Installation requirements are low, as long as there is a straight pipe section 250-300m m can be installed with a self-rectifying function, not affected by irregular fluids, or even multi-rotating airflow up to a small pressure loss, the pressure loss is only wing wing 10 %. Its flow coefficient is stable and no on-site calibration is required. In-line purging and maintenance can be performed through a deblocking purge device. It has good long-term stability, wide application range, simple structure, easy operation, and easy troubleshooting.
The cross-sectional flowmeter measurement is not affected by changes in fluid density, viscosity, temperature, pressure, and conductivity. There are no flow-blocking components in the measurement tube, no pressure loss, and low straight pipe section requirements. It has unique adaptability to the measurement of slurry, reasonable selection of electrodes and lining materials, ie, good corrosion resistance and wear resistance, all digital quantities, strong anti-interference ability, reliable measurement, high precision, and flow measurement range up to 150:1. There are no moving parts in the cross-section flowmeter, no flow block components, almost no additional pressure loss during the measurement, on-site modification of the range according to the actual needs of the user, measurement results and flow velocity distribution, fluid pressure, temperature, density, viscosity and other physical parameters Irrelevant, all Chinese menu operation, easy to use, simple operation, easy to learn and understand.

Blank Flange is the same to Blind Flange, usually ANSI (ASME) B16.5, BS4504 and SANS1123 flanges standard called blind flange type to blank flange, DIN EN1092-1 UNI GOST33259 and JIS B2220 usually call blind flange but BS4504, ANSI B16.5 and SANS1123 called blank flange, blank flange also have RF FF and RTJ facing type.

Blank Flange

Blank Flange, Blank Flange Raised Face, Blank Flange Flat Face, BLRF BLFF, ANSI BLANK FLANGE

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