Boiler main steam, main feedwater, regenerated steam long diameter nozzle flowmeter

Long diameter nozzle flowmeterDetailed information:

QX-LGmajor axisThe nozzle flowmeter (long diameter nozzle flowmeter) is a flow measurement device with the characteristics of high temperature and high pressure resistance, impact resistance, long service life, large measurement range, and measurement accuracy. It is a throat pressure measuring deviceβ value lengthpathThe nozzle device is suitable for measuring fluid flow with high velocity in high-temperature and high-pressure steam heating network pipelines of power plants, as well as for measuring mainstream flow, such as precise measurement of condensate flow in power plants, measurement of feedwater flow or steam flow in power plants, and flow testing scenarios such as fan performance testing and compressor performance testing. Standard nozzle according to national standardsDesign and manufacture according to GB/T2624-93, and verify according to JJG640-94. No real flow calibration is required.

Long diameter nozzle flowmeterMeasurement principle:

Long diameter nozzle flowmeterThe measurement principle is to use a throttling flow sensor. It adopts a special pressure measurement method (throat pressure measurement) based on the nozzle, making the flow sensor not only have traditional longpathThe advantages of a nozzle include stable outflow coefficient and high repeatability. It is a high-precision flow sensor. Flow calculation formula:

Product Features

1. The structure of the throttling device is easy to replicate, simple and sturdy, with stable and reliable performance, long service life, and low price.

2. The nozzle calculation adopts international standards and processing

3. The nozzle has a wide range of applications, all single-phase flows can be measured, and some mixed phase flows can also be applied.

4. The standard throttling device does not require real flow calibration and can be put into use.

5. Adopting imported monocrystalline silicon intelligent differential pressure sensor

6. High precision, comprehensive self diagnostic function

7. The range of the intelligent standard nozzle intelligent orifice flowmeter can be self programmed and adjusted.

8. The intelligent standard nozzle can simultaneously display cumulative flow rate, instantaneous flow rate, pressure, and temperature.

9. In addition to online and dynamic full compensation functions, the intelligent orifice flowmeter also has self diagnosis and self setting range.

Equipped with multiple communication interfaces

10. High stability

11. Wide range, greater than 10:1

12. High precision: ± 0.075%

13. High stability: better than 0.1% FS/year

14. High static pressure: 40MPa

15. Continuous work for 5 years without calibration required

16. Negligible effects of temperature and static pressure

17. Anti high overvoltage

18. The measurement data is authentic and reliable, and can be used as a trade settlement measurement meter.

Long diameter nozzle flowmeterNearby velocity and pressure distribution map

Long diameter nozzle flowmeterTechnical Specifications

1. Applicable medium; Specially suitable for high temperature and high pressure steam and water, and can also be used for various gases and liquids
2. Nominal caliber: DN50-600mm
3. Work pressure: ≤ 42MPa
4. Working temperature: -50 ℃ -600℃
5. Pressure measurement method: radial distance (D-D/2) pressure measurement
6. Installation method of nozzle components: Install and weld the upstream and downstream pipe sections, and then set pressure tapping holes according to the diameter distance (D-D/2)
7. Execution standard: IS05167; GB/T2624
8. Accuracy: Complies with standard levels 1 and 1.5

9. Material: The upstream and downstream pipe sections can be selected from carbon steel, alloy steel, stainless steel, etc. according to the medium temperature, and the nozzle304/316

10. Reynolds number range: 0.30 ≤ β ≤ 0.44, 70000 ≤ ReD ≤ 107, 0.44 ≤ β ≤ 0.8, 20000 ≤ ReD ≤ 107

11. Throat diameter ratio: 0.30 ≤ β ≤ 0.80

Long diameter nozzle flowmeterInstallation precautions:

1. Can be installed horizontally, vertically, or diagonally, ensuring that the pipe is filled with liquid;
2. The front and rear straight pipe sections of the throttling device should be straight, without visible bending to the naked eye, and should be "round". The inner wall should be clean, without pits or sediment;
3. The length requirements of the straight pipe section and the installation of the throttling device shall comply with the relevant provisions of GB/T2624-93;
4. The installation of pressure pipelines should comply with the specifications specified in the standards.

longpathComparison of advantages and disadvantages between nozzle flowmeter and standard orifice flowmeter