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『Selection of metal tube float flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
What parameters are required for the selection of a rotor flowmeter?
1. For the selection of remote output metal tube float rotor flowmeter, it is necessary to choose a rotor flowmeter that is suitable for the explosion-proof requirements of the application site; During installation, attention should also be paid to the fastening of the instrument casing and the sealing of the wiring ports after power on, to meet the requirements of explosion prevention, protection, and corrosion prevention. 2. For places where the temperature of the measured medium is too high (>120 ℃) or too low, insulation or heat insulation measures should be taken for the sensor part of the rotor flowmeter. To ensure the normal working environment temperature of the signal converter indicator, a high temperature indicator should be selected. 3. For some measured media that require insulation or cooling, a jacket type rotor flowmeter should be selected. The heat tracing or cooling bucket of the standard metal tube float rotor flowmeter adopts DIN2501 DN15 PN1.6 flange connection for this grip interface. If other flanges or threaded connections are required, please specify
4. For the unstable pressure of the inlet medium of the rotor flowmeter, especially for gas measurement, damping structure should be selected to ensure accuracy and service life.
5. For the medium with high pressure requirements, when exceeding the standard pressure level, please choose high-pressure structure when selecting, and use HG20595-97 RF neck welded steel pipe flange for high-pressure type. If other standards are used, please indicate
6. When installing the rotor flowmeter, the verticality of the measuring tube should be ensured to be better t
7. The installation position of the rotor flowmeter should ensure that there is a straight pipe section of ≥ 5DN at the inlet and a straight pipe section of ≤ 250mm at the outlet;
; If the medium contains ferromagnetic substances, a magnetic filter should be installed before the rotor flowmeter. The control valve in the measurement and control system should be installed downstream of the rotor flowmeter. When used for gas measurement, it should be ensured that the working pressure is not less than 5 times the pressure loss of the rotor flowmeter to ensure stable operation of the rotor flowmeter. Before installing the metal tube float rotor flowmeter, the welding slag inside the pipeline should be blown clean and tidy; During installation, remove the stop element from the rotor flowmeter; When using after installation, slowly open the control valve to avoid impact damage to the rotor flowmeter.2. Main technical parameters of small flow metal tube float flowmeter
The main technical parameters of small flow metal tube float flowmeter are as follows
1. Flow range: When in water (20 ℃), the full-scale range is 3-100L/h;
; When in air (0.1013MPa, 20 ℃), the range can reach 50-3400NL/h2. Accuracy level: Standard type is 4.0 level, special type is 2.5 level, and users can choose products with different accuracy levels according to their needs
3. Flow scale division: Divided according to the actual flow scale to ensure measurement accuracy and reliability
4. Maximum pressure: Standard type can reach 6.4MPa, special type can reach 20MPa, suitable for high-pressure environments