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Design conditions of differential pressure transmitter

by:Sure     2021-08-11
Differential pressure transmitter design conditions: 2000m3 oil tank, diameter du003d14.5m, the height can get the actual oil inventory G, and the density hu003d14m can be known from the formula. Primary meter: 1151LT flange type explosion-proof differential pressure transmitter. The flange type is used to prevent the dirt at the bottom of the tank from clogging the pressure pipe. The range of the transmitter is 0~140kPa. Secondary meter: Choose WP series intelligent light beam display alarm instrument differential pressure transmitter Design conditions: 2000m3 oil tank, diameter du003d14.5m, height can get the actual oil inventory G, and the density ρhu003d 14m.  One-time meter: 1151LT flange type explosion-proof differential pressure transmitter. The flange type is used to prevent the dirt from the bottom of the tank from clogging the pressure pipe. The range of the transmitter is 0~140kPa.   Secondary meter: Choose WP series intelligent light beam display alarm instrument, universal signal input, can change the range arbitrarily, display the liquid level with the light beam, and display the tonnage of the oil by the number. Take 6# tank as an example, Su003dπ×r2u003d3.14×7.252u003d165m2, and the height is 14m.  On the top of the oil tank, the differential pressure transmitter is designed with a liquid level alarm device to prevent the oil from overflowing, as a double insurance. In the application, the measured value is directly the tonnage, so no matter what kind of oil is stored in the oil tank, the value displayed by the secondary meter is the tonnage of the oil in the tank, which avoids the need to determine the density for conversion. Differential pressure transmitters generally use pumps to transport oil products through oval gear flowmeters. Due to the limited accuracy of the flowmeters, the highest is only 0.2. The differential pressure transmitters also need to measure density calculations, and the results are often Some discrepancies caused measurement disputes. Now because the measurement result of the oil tank is in tons, and the accuracy can reach 0.2 or even 0.1, the measurement result of the differential pressure transmitter is more accurate compared with the positive displacement flowmeter. Although the absolute error of the measurement results is relatively large due to the resolution when a small number of oil products are in and out of the warehouse, when a large number of oil products are in and out of the warehouse, its higher accuracy and smaller relative error, differential pressure The transmitter is unmatched by other measurement methods, and is especially suitable for monthly, quarterly, and annual inventory. Practice has shown that the main advantages of differential pressure transmitters are: ① simple and convenient installation and maintenance; ② intuitive and direct reading, can directly read the inventory of oil products; ③ free of density measurement and conversion.
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