Selection of Glass Rotor Flowmeters | Model, Specifications, and Technical Parameters of LZB Glass Rotor Flowmeters | Baoshan ultrasonic flowmeter manufacturer

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What is the relationship between the calibration pressure and range of a glass rotor flowmeter? The calibration pressure of a glass rotor flowmeter is positively correlated with the range, and the higher the calibration pressure, the larger the flow range. 1. Core relationship • Pressure induced turbulence determines the density of the medium: Calibration pressure directly affects the density of the gas medium (according to the ideal gas state equation PV=nRT), and changes in density will cause changes in the force on the float, thereby affecting the flow measurement range. • Range correction formula: The actual range needs to be corrected according to the calibration pressure. The formula is: $$Q_ {Actual}=Q_ {Calibration} \ times \ sqrt {\ frac {P_ {Calibration}} {P_ {Actual}} $(Q is flow rate, P is absolute pressure) 2 Parameter Corresponding Example | Calibration Pressure (MPa) | Typical Range (Air, L/min） | |----------------|---------------------------| | 0.1| 0.5-5 | | 0.6| 2-25 | | 1.0| 5-50 | 3. Operational limitations • Maximum pressure: The pressure resistance of ordinary glass rotor flow meters is ≤ 1.6MPa. If it exceeds this limit, a metal tube type should be selected. Nonlinear interval: When the pressure exceeds 30% of the calibration value, the flow indication error may be greater than 5% (please refer to the specific model manual). four When selecting gas measurement, the calibration pressure should be ≥ 1.2 times the actual working pressure of the pipeline. Liquid measurement can be ignored due to small density changes and negligible pressure effects.

2. 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 than 5%, and a bypass should be installed for easy maintenance and cleaning without affecting production

7. The installation

Selection of Glass Rotor Flowmeters | Model, Specifications, and Technical Parameters of LZB Glass Rotor Flowmeters

2. What parameters are required for the selection of a rotor flowmeter?

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