Orifice steam flowmeter | Principle of condensing tank for steam orifice flowmeter

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1. The meaning of the coefficient k of steam orifice flowmeter

The ratio between the pressure difference and flow rate of the orifice instrument under certain flow rate, rolling and viscosity conditions, that is, k=Cv × (d/D) ^ 2. The steam orifice flowmeter is a commonly used instrument for measuring steam, gas, and liquid flow rates. Its coefficient k refers to the flow coefficient of the orifice plate and is one of the important parameters for measuring fluid flow with this instrument. The magnitude of the coefficient k determines the sensitivity and accuracy of the orifice instrument. The larger the value of k, the higher the sensitivity of the orifice instrument, and the wider the flow range that can be measured. However, this can also cause certain pressure losses.

2. How to design the parameters of the secondary meter of the orifice steam flowmeter

When choosing a secondary meter, it is recommended to use a display meter with temperature and pressure compensation function.

. If the differential pressure transmitter is not equipped with square root function, the secondary instrument should have square root setting function. For saturated steam, temperature or pressure compensation is required; For superheated steam, temperature and pressure compensation need to be performed simultaneously. Specific parameter configuration should refer to the instruction manual for guidance. Firstly, set the range to ensure that the instrument can cover the required measurement range. Next, configure the decimal places and units to meet the specific needs of the application scenario. When performing temperature compensation, it is necessary to ensure that the instrument can accurately reflect the actual Orifice steam flowmeter

temperature changes to ensure the accuracy of steam flow measurement. For pressure compensation, instruments also need to have corresponding precision sensitivity to ensure measurement accuracy under different pressure conditions. When setting the range, the appropriate range should be selected based on the actual steam flow range used. This ensures that the instrument does not experience saturation or lower limit alarms during the measurement process. The setting of the decimal point should be determined according to actual needs, usually with two or three decimal places, to meet the requirements of measurement accuracy. At the same time, choose appropriate units (such as kg/h or t/h) to facilitate understanding and recording of measurement results. By following the above steps, secondary instruments can be effectively configured to ensure optimal performance during steam flow measurement.

3. Temperature and pressure installation position of orifice steam flowmeter

The installation position of temperature and pressure measuring points of orifice steam flowmeter has clear specifications to ensure wax resistance and accurate and reliable measurement.

. 1. The temperature sensor should be inserted into the pipeline at an angle of 45 ° along the direction of fluid flow, ensuring that the measuring end is within one-third of the center of the pipeline. The measuring point is located downstream of the orifice plate, at a distance of 5 to 10 times the inner diameter of the pipeline from the outlet end face of the orifice plate

2. The installation position of the pressure measuring point should be flush with the inner wall of the pipeline to avoid protrusions or burrs. For standard orifice plates, the pr

Orifice steam flowmeter | Principle of condensing tank for steam orifice flowmeter

1. The meaning of the coefficient k of steam orifice flowmeter

2. How to design the parameters of the secondary meter of the orifice steam flowmeter

3. Temperature and pressure installation position of orifice steam flowmeter

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