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1. Qingdao Aobo ORB-LUGB Vortex Street Steam Flow Meter 80 Size
Qingdao Aobo ORB-LUGB Vortex Street Steam Model World Watch Flow Meter DN80 Specification Parameters and Selection Guide
1. Core Parameters nominal diameter: DN80 (flange mounted) Measuring medium: steam (saturated/superheated), gas, liquid Accuracy level: liquid ± 1.0%, gas/steam ± 1.5% Pressure resistance level: standard 1.6MPa/2.5MPa, customizable 4.0-10.0MPa Temperature range: -20 ℃~350 ℃ (special calibration required for high temperature steam) Body material: 304 stainless steel (contact medium part)
2. Key Features 1 Wide range ratio: usually up to 1:10~1:15, suitable for scenarios with large flow fluctuations No moving parts: using piezoelectric sensors to reduce wear and maintenance requirements Integrated display: On site LCD screen displays instantaneous/cumulative traffic in real-time Signal output: 4-20mA analog signal+pulse output, supporting RS485 communication (MODBUS protocol)
III. Selection precautions • Steam type: saturated steam requires temperature compensation, superheated steam requires temperature and pressure compensation • Installation requirements: front and rear straight pipe sections are recommended to be 20DN/5DN (to ensure measurement accuracy) buried • Protection level: IP65 (outdoor rain and dust protection), explosion-proof type can be selected Ex d Ⅱ CT6
IV. Typical application scenarios • Boiler steam metering (condenser required) • Chemical process steam consumption monitoring • Food processing industry high temperature medium flow control Data source: Qingdao Aobo Instrument 2023 version product technical manual, specific selection needs to be based on actual working conditions paramete
2. Could anyone please explain in detail the starting flow rate of the flowmeter, the more detailed the better.
The vortex flowmeter is a flow measurement instrument designed based on the Karman vortex principle, suitable for measuring the volumetric flow rate of gases, liquids, and vapors, as well as the volumetric flow rate or mass flow rate under standard conditions.. Its measuring medium includes but is not limited to gas, liquid, and vapor, with various connection methods including flange clamping, flange, and insertion, and a wide range of caliber options. The measurement range of the vortex flow sliding pin gauge is wide and suitable for fluids with Reynolds numbers between 1.5 × 104 and 4 × 106. For gases, the measurement range is 5-50m/s; The measurement range for liquids is 0.5-7m/s. In addition, the measurement accuracy of vortex flowmeter is divided into 1.0 level and 1.5 level, and it is believed that the temperature range of the measured medium covers normal temperature -25 ℃~100 ℃, high temperature -25 ℃~150 ℃ or -25 ℃~250 ℃. This flowmeter has two output modes: pulse voltage output signal and pulse current remote transmission signal. The high level of the pulse voltage output signal is 8-10V, the low level is 0.7-1.3V, the pulse duty cycle is about 50%, and the transmission distance can reach 100 meters. The pulse current remote transmission signal is 4-20 mA, with a transmission distance of 1000 meters. The working environment requirements for vortex flowmeters are relatively tolerant, with a temperature range of -25 ℃ to+55 ℃ and humidity of 5-90% RH below 50 ℃. The material selection of vortex flowmeter is diverse, including stainless steel and aluminum